GPSC Assistant Engineer 2020: Preliminary, Assistant Engineer (Electrical) Class-2, Road and Building Department
Text of page 1
AMF
PROVISIONAL ANSWER KEY
Name of The Post Assistant Engineer (Electrical), Class-2, Road and Building
Department
Advertisement No 82/2019-20
Preliminary Test Held On 01/03/2020
Que. No. 001-300 (General studies & Concerned Subject)
Publish Date 02-03-2020
Last Date to Send 09-03-2020
Suggestion (S)
Instructions / સૂચના
Candidate must ensure compliance to the instructions mentioned below, else objections
shall not be considered: -
(1) All the suggestion should be submitted Physically in prescribed format of suggestion sheet.
(2) Question wise suggestion to be submitted in the prescribed format of Suggestion Sheet
published on the website.
(3) All suggestions are to be submitted with reference to the Master Question Paper with
provisional answer key, published herewith on the website. Objections should be sent
referring to the Question, Question No. & options of the Master Question Paper.
(4) Suggestions regarding question nos. and options other than provisional answer key (Master
Question Paper) shall not be considered.
(5) Objections and answers suggested by the candidate should be in compliance with the
responses given by him in his answer sheet /response sheet. Objections shall not be
considered, in case, if responses given in the answer sheet /response sheet and submitted
suggestions are differed. For the purpose, the candidate shall attach a copy of his
answersheet/ Response sheet along with his application(s).
(6) Objection for each question shall be made on separate Suggestion sheet. Objection for more
than one question in single Suggestion sheet shall not be considered & treated as cancelled.
ઉમેદવાર ે નીચેની સૂચનાઓનું પાલન કરવાની તકે દારી રાખવી, અ યથા વાંધા-સૂચન અંગે કર ેલ રજૂ આતો યાને
લેવાશે નહીં
(1) ઉમેદવારે વાંધા-સૂચનો િનયત કરવામાં આવેલ વાંધા-સૂચન પ કથી રજૂ કરવાના રહેશે.
(2) ઉમેદવારે માણે વાંધા-સૂચનો રજૂ કરવા વેબસાઈટ પર િસ ધ થયેલ િનયત વાંધા-સૂચન પ કના નમૂનાનો જ
ઉપયોગ કરવો.
(3) ઉમેદવારે પોતાને પરી ામાં મળે લ પુિ તકામાં છપાયેલ માંક મુજબ વાંધા-સૂચનો રજૂ ન કરતા તમામ વાંધા-
સૂચનો વેબસાઈટ પર િસ ધ થયેલ ોિવઝનલ આ સર કી (મા ટર પ )ના માંક મુજબ અને તે સંદભમાં
રજૂ કરવા.
(4) મા ટર પ માં િનિદ અને િવક પ િસવાયના વાંધા-સૂચન યાને લેવામાં આવશે નહીં.
(5) ઉમેદવારે જે ના િવક પ પર વાંધો રજૂ કરેલ છે અને િવક પ પે જે જવાબ સૂચવેલ છે એ જવાબ ઉમેદવારે પોતાની
ઉ રવહીમાં આપેલ હોવો જોઈએ. ઉમેદવારે સૂચવેલ જવાબ અને ઉ રવહીનો જવાબ િભ હશે તો ઉમેદવારે રજૂ
કરેલ વાંધા-સૂચન યાનમાં લેવાશે નહીં. આ હેતુ માટે , ઉમેદવારે પોતાની અર (ઓ) સાથે પોતાની જવાબવહીની
એક નકલનું િબડાણ કરવાનું રહેશે.
(6) એક માટે એક જ વાંધા-સૂચન પ ક વાપરવું. એક જ વાંધા-સૂચન પ કમાં એકથી વધારે ોની રજૂ આત કરેલ
હશે તો તે અંગેના વાંધા-સૂચનો યાને લેવાશે નહીં.
Text of page 16
M
101. The inverse Fourier transform of δ(f) is
(A) 1 (B) u(t) (C) δ(t) (D) ei2pt
102. The sequence components of the fault current are as follows: i+ = j0.5 p.u., i– = – j0.5 p.u.,
i0 = –j1 p.u. The type of fault in the system is:
(A) LG (B) LL (C) LLG (D) LLLG
K
103. For a system G(s)H(s) = , the phase crossover frequency is
(1 + s ) (1 + 2s ) (1 + 3s )
(A) 2 (B) 0 (C) 1 (D) 3
104. Synchronous condenser refers to
(A) over excited synchronous generator
(B) over excited synchronous motor
(C) neither (A) nor (B)
(D) either (A) or (B)
105. The dimension of Hessian matrix i.e., H-matrix in power system state estimation for m number
of measurements and n number of variables to be estimated is _____________.
(A) mxn (B) (m – 1) x (n – 1)
(C) (m + 1) x (n + 1) (D) None
106. An FIR filter does not have the following property
(A) Has a finite length (B) Is always stable
(C) Cannot have linear phase (D) None of the above
107. Statement 1: In circuit analysis loads are represented in the form of impedance, whereas in
power flow analysis loads are represented in the form of power consumption.
Statement 2: In circuit analysis voltage source is considered as infinite, whereas in power flow
analysis sources are considered with some generation capacity.
Which of the statements is true?
(A) Statement 1 (B) Statement 2
(C) Both the statements (D) None
108. Which theorem assists in replacement of an impedance branch over the network by the
other network comprising different circuit components, without affecting the V-I relations
throughout the entire network?
(A) Superposition Theorem (B) Compensation Theorem
(C) Substitution Theorem (D) Maximum Power Transfer Theorem
16 (AMF–M] [Contd.
Text of page 17
M
109. Consider a feedback system with gain margin of about 30. At what point does Nyquist plot
cross negative real axis?
(A) – 3 (B) – 0.03 (C) – 30 (D) – 0.3
110. Which one of the following is correct statement?
The continuous time system described by y(t) = x(t2) is
(A) Causal, linear and time varying
(B) Causal, non-linear and time varying
(C) Non-Causal, non-linear and time invariant
(D) Non-Causal and time variant
111. Licensing is governed by which Section of Electricity Act 2003?
(A) Section 9 (B) Section 10
(C) Section 11 (D) Section 12
112. In 8051, the register that can be used as a scratch pad is
(A) B register (B) Accumulator
(C) Data register (D) Accumulator and B register
12
113. The DC gain of a system represented by the transfer function is
(s + 2 ) (s + 3 )
(A) 5 (B) 10 (C) 1 (D) 2
114. The speed of a DC shunt motor is required to be more than F.L. (Full Load) speed. This is
possible by ___________.
(A) Increasing the armature current (B) Decreasing the armature current
(C) Increasing the excitation current (D) Reducing the field current
115. What is the Laplace transform of delayed unit impulse function δ(t – 1)?
(A) 1 (B) Zero (C) exp(– s) (D) s
− 10 0
116. The Transfer Function of a system given by T(s) = s 2 + 2 0s + 1 0 0 . The system is
(A) Critically damped (B) Overdamped
(C) Underdamped (D) Unstable
117. The additional input to a relay apart from current and voltage signals from CT and PT is:
(A) Frequency (B) Voltage signal
(C) current (D) status of circuit breaker
(AMF–M] [P.T.O. 17
Text of page 18
M
118. The time span of electro-magnetic transients and switching surges in a power system will be:
(A) (10-100) sec (B) (0-10) sec
(C) (0-100) m sec (D) Any time range
119. If the magnitude of G(jω) H(jω) at phase crossover frequency is 0.5, find the gain margin of
the given system.
(A) 0.5 (B) 1 (C) 4 (D) 2
120. In the case of full wave rectifier, the ripple factor is
(A) 0.48 (B) 0.5 (C) 1.51 (D) 1
121. The signal x(t) = A cos (ωt + φ) is
(A) A power signal (B) An energy signal
(C) An energy as well as power signal (D) Neither an energy nor a power signal
122. In DC chopper, the waveform for input and output voltages are respectively
(A) Both discontinuous (B) Both continuous
(C) Continuous, discontinuous (D) Discontinuous, continuous
123. DC generators are designed to develop armature voltages not exceeding 650 V because of the
limitations of
(A) Field winding (B) Armature Winding
(C) Commutator (D) Starter
124. A system described by y (n) = x2(n) is
(A) Nonlinear (B) Linear
(C) cannot be determined (D) Dependent on x (n)
p p ) is,
125. The phase difference between two signals x1(t) = 2sin (2t + ) and x2(t) = – 3 sin(2t +
2 2
(A)
p (B) –
p (C) 0 (D) p
2 2
126.
None of the poles of a linear control system lie in the right half of s plane. For a bounded input,
the output of this system is,
(A) Always bounded (B) Could be unbounded
(C) Tends to zero (D) None of these
127. Which among the characteristics of the crystal diode is used for rectification?
(A) Opposite (B) Can’t be determined
(C) Forward or reversed (D) Forward
18 (AMF–M] [Contd.
Text of page 19
M
128. A power station generates 600 MW of electrical power which is fed to a transmission line. If
the input voltage is 300 Kv, then what current would flow in the transmission line?
(A) 5 × 103 A (B) 10 × 103 A (C) 7 × 103 A (D) 2 × 103 A
129. In 8051 architecture, the transmit buffer of serial data buffer is a
(A) parallel-in serial-out register (B) serial-in parallel-out register
(C) serial-in serial-out register (D) parallel-in parallel-out register
130. Power transformers are designed to have maximum efficiency at
(A) Full load (B) 50% load
(C) 80% load (D) no load
131. The characteristic equation has the following Roots over damped stable system.
(A) 2,2 (B) – 2 + j4 (C) 2, – 2 (D) – 2, – 4
132. The average value of the signal 2cos100t is
1
(A) 0 (B) 2 (C) (D) 2
2
133. The solution of voltage angles for a 3 bus system are found to be 0, – 4 and 7 degrees respectively.
Which of the following can also be considered as another solution?
(A) 1, – 3 and 8 (B) – 1, – 5 and 6
(C) Both (A) and (B) (D) No other solution exists
134. An electromagnetic torque is produced as an interaction between flux and current. The angle
between flux and current is 45°. If this angle is changed to 30°, flux increases by 100% and
current reduces by 25%, then the torque
(A) Increases to 183.7% of the original (B) Reduces to 81.6% of the original
(C) Reduces to 54.4% of the original (D) Reduces to 66.7% of the original
135. Non-minimum phase transfer function is defined as the transfer function
(A) Which has zero in the right-half s-plane
(B) Which has zero only in the left-half s-plane
(C) Which has poles in the right-half s-plane
(D) Which has poles in the left-half s-plane
136. The ripple frequency of a six-phase half wave rectifier for 220 V, 60 Hz input is
(A) 2160 Hz (B) 720 Hz (C) 60 Hz (D) 360 Hz
137. Sin c(x) function is defined as
sin (πx)
(A) x sin(x) (B)
πx
(C) x cos(x) (D) None of the above
(AMF–M] [P.T.O. 19
Text of page 20
M
138. Laplace transform of u (t) is
1 1
(A) 1 (B) (C) s (D)
s s+1
139. Mechanical power developed by a DC series motor is maximum when
(A) back emf is equal to half the applied voltage.
(B) back emf is equal to applied voltage.
(C) back emf is equal to twice the applied voltage.
(D) back emf is equal to zero.
5 (1 + 0.3s )
140. The Compensator G(s) = would provide a maximum phase shift of:
(1 + 0.1s )
(A) 30° (B) 10° (C) 40° (D) 60°
141. Which of the following braking is not suitable for the motor?
(A) Plugging (B) Regenerative braking
(C) Dynamic braking (D) Friction braking
142. For a 6-pole dc machine with wave wound armature, the number of brushes required is
(A) 2 (B) 4 (C) 6 (D) 12
143. In a series resonant circuit, the impedance of the circuit is
(A) Zero (B) Maximum
(C) Minimum (D) None of the above
1
144. Inverse Laplace transform of is
s+1
(A) u(t) (B) u(– t)
(C) e– t u(t) (D) et u(– t)
145. Transfer function of the system y (n) = x(n) – 2x(n–1) + y (n–1) can be given by
1 − 2 z −1 1 − 2 z −1 1 − z −1 1 + z −1
(A) (B) 1− z −1 (C) 1 − 2z −1 (D)
1 + z −1 1 − 2z −1
146. If holding current of a thyristor is 2 mA then latching current should be
(A) 0.01 A (B) 0.002 A (C) 0.009 A (D) 0.004 A
147. An SCR is considered to be a semi-controlled device because
(A) it can be turned OFF but not ON with a gate pulse
(B) it conducts only during one-half cycle of an alternating current wave
(C) it can be turned ON but not OFF with a gate pulse
(D) it can be turned ON only during one-half cycle of an AC
20 (AMF–M] [Contd.
Text of page 21
M
148. Commutation conditions at full load for large DC machines can be efficiently checked by the
(A) Brake test (B) Swinburne’s test
(C) Field test (D) Hopkinson’s test
149. The impulse response of system is c (t) = – te– t + 2e– t (t > 0). Its closed loop transfer function is
( 2s + 1) ( 2s + 1)
(A) (B)
s2 (s + 1) 2
( 2s + 2)
(C) (D) ( 2s + 2)
(s + 1) 2 s2
150. Short transmission line is governed by
(A) Thermal limits (B) Stability limit
(C) Surge impedance loading (D) No limits
151. In the process of state estimation for a DC network, H-matrix is ___________ with the variation
of variable to be estimated and H-matrix for a power system network is __________ with the
variation of variable to be estimated.
(A) Variable, Variable (B) fixed, fixed
(C) Variable, fixed (D) fixed, variable
152. The minimum duration of the pulse in a pulse triggering system for thyristors should be at
(A) 10 μs (B) 10 ms (C) 30 ms (D) 1 sec
153. The unit circle of the Nyquist plot transforms into 0 db line of the amplitude plot of the Bode
diagram at
(A) 0 (B) Low frequency
(C) Any frequency (D) High frequency
154. The power consumed in a circuit element will be least when the phase difference between the
current and voltage is
(A) 180° (B) 90° (C) 60° (D) 0°
155. Which among the below specified assertions are precisely related to the conditions applicable
for a path to be an improper subgraph?
A. Incidence of a single branch at a terminating node
B. Incidence of two branches at the remaining nodes
(A) A is true & B is false (B) A is false & B is true
(C) Both A & B are true (D) Both A & B are false
(AMF–M] [P.T.O. 21
Text of page 22
M
156. A half-controlled single-phase bridge rectifier is supplying an R-L load. It is operated at a firing
angle a and the load current is continuous. The fraction of cycle that the freewheeling diode
conducts is
(A) a/p (B) a (C) p+a (D) p–a
157. Which among the following indicates early effect in BJT?
(A) Zener breakdown (B) Base narrowing
(C) Avalanche breakdown (D) Thermal breakdown
158. Fleming’s left-hand rule is applicable to
(A) DC generator (B) DC motor
(C) Alternator (D) Transformer
159. What will be the nature of impedance at a frequency below the antiresonant frequency?
(A) Capacitive (B) Inductive
(C) Reactive (D) Resistive
160. Which of the following transfer functions represents under-damped second order systems?
1 4
(A) 2 (B)
s + 3s + 1 2
s + 2s + 4
2
(C) 2
(D) All of the above
s + 4s + 2
161. DFT of the single point sequence δ(n) can be given by
(A) 1 (B) 0 (C) ∞ (D) not defined
162. A capacitor start, capacitor run induction motor is basically a,
(A) ac series motor (B) dc series motor
(C) 3-phase induction motor (D) 2-phase induction motor
163. Phasor analysis can be applied if
(A) input is DC and system has reached its steady state
(B) input is sinusoidal and system has reached its steady state
(C) input is DC and system has not reached its steady state
(D) input is sinusoidal and system has not reached its steady state
22 (AMF–M] [Contd.
Text of page 23
M
164. The purpose of using the dummy coil in a dc machine is to
(A) Eliminate harmonics developed in the machine
(B) Eliminate armature reaction
(C) Bring mechanical balance of the armature
(D) Bring mechanical balance of the body of the motor
165. Which operation is likely to get executed or performed by Millman’s theorem in terms of
converting the voltage or current sources into a single equivalent voltage or current source?
(A) Subtraction (B) Combination
(C) Differentiation (D) Integration
166. For an unity feedback system with G(s) =
K (s + 2 )
, part of the root locus is a circle of radius
approximately s (s + 1)
(A) 1 (B) 1.25 (C) 1.5 (D) 2
167. A device that cannot be triggered with low voltage of either polarity is
(A) Diac (B) Triac (C) SCS (D) All of the above
168. Assertion (A): The phase angle plot in Bode diagram is not affected by variation in the system
gain. Reason(R): the variation in the gain of the system has no effect on the phase margin of
the system.
(A) Both A and R are true but R is correct explanation of A
(B) Both A and R are true but R is incorrect explanation of A
(C) A is true but R is false
(D) A is false but R is true
169. The phase crossover frequency of the system is the frequency at which the phase angle first
reaches:
(A) – 90° (B) – 180° (C) 90° (D) 180°
k
170. A control system has open loop transfer function G(s) = . Breakaway point lies
between s (s + 4 ) (s + 6 )
(A) 0&–4 (B) 0&4 (C) –4&–6 (D) –4&6
171. The voltage magnitude and angles at the terminal buses A and B of a transmission line are
2 ∠0.2 0 and 11.05
1.02 5 ∠0.2 0 , respectively. Then the active and reactive power flow between A and
.0
B are ___________ and ___________, respectively.
(A) Zero, Positive (B) Positive, Zero
(C) Zero, Negative (D) Negative, Zero.
(AMF–M] [P.T.O. 23
Text of page 24
M
172. What will be the midpoint voltage when the voltage magnitude at the terminal buses of a
transmission line is maintained at nominal values?
(A) Nominal value (B) More than nominal value
(C) Less than nominal value (D) None
173. A 150 V DC motor of armature resistance 0.4 Ω has back emf of 142 V. The armature current is
(A) 100 A (B) 10 A (C) 150 A (D) 20 A
174. Two DC series motors connected in series draw current I from supply and run at speed N. When
the same two motors are connected in parallel taking current I from the supply, the speed of
each motor will be
(A) N/2 (B) N (C) 2N (D) 4N
175. An electrical switch that opens and closes under the control of another electrical circuit is called
(A) Fuse (B) Relay
(C) Breaker (D) Transformer
176. In a power system, active power is influenced with
(A) Voltage angle (B) Voltage magnitude
(C) Frequency (D) Both (A) & (C)
177. Root locus is used to calculate
(A) Marginal Stability (B) Absolute Stability
(C) Relative Stability (D) Conditional Stability
178. RC snubber circuit is used to limit the rate of
(A) Rise of current in SCR (B) Rise of voltage across SCR
(C) Conduction period (D) All of the above
179. In reverse blocking mode of a thyristor
(A) junction J1, J3 is in reverse bias and J2 is in forward bias.
(B) junction J1 and J2 is in forward bias and J3 is in reverse bias.
(C) junction J2 is in reverse bias and J1, J3 is in forward bias.
(D) junction J3 is in forward bias and J1, J2 in reverse bias.
180. What is the z-transform of the signal x(n) = [3(2n)]u(n)?
(A) 3/(1 – 2z–1) (B) 3/(1 + 2z–1)
(C) – 3/(1 – 2z) (D) None of the mentioned
24 (AMF–M] [Contd.
Text of page 25
M
181. The regulating constant in Automatic Generation Control (AGC) is defined as the ratio of:
∆P ∆P
(A) (B)
∆f ∆d
∆f ∆d
(C) (D)
∆P ∆P
182. If the firing angle in an SCR rectifier is decreased, the output is
(A) Increased (B) Maximum
(C) Decreased (D) Remains unaffected
183. In a three-phase halfwave rectifier, the ratio of average output voltage to per phase maximum
AC voltage is
(A) 1 (B) 1.169 (C) 0.827 (D) 1.571
(s − 1)
184. An Open loop Control System, represented by the transfer function G(s) = , is
(s + 2 ) (s + 3 )
(A) Stable and of the non-minimum phase type
(B) Stable and of the minimum phase type
(C) unstable and of the minimum phase type
(D) unstable and of the non-minimum phase type
185. Number of roots in left half of s plane of the characteristic equation s3– 4s2 + s + 6 = 0 is
(A) 2 (B) 3 (C) 1 (D) 0
186. The angle d in the swing equation of a synchronous generator is the
(A) Angle between stator voltage and current
(B) Angular displacement of the rotor with respect to the stator
(C) Angular displacement of the stator mmf with respect to a synchronously rotating axis
(D) Angular displacement of an axis fixed to the rotor with respect to a synchronously rotating axis
187. In a distance protection scheme, if the ratio of apparent impedance seen by a relay and positive
sequence impedance is less than unity then it indicates:
(A) Healthy condition (B) Fault
(C) ideal state (D) None
188. As per Electricity Act 2003, any generating company may establish, operate and maintain a
generating station without obtaining a licence under this Act if it complies with the technical
standards relating to connectivity with the grid referred to in which section?
(A) Section 69 (B) Section 71
(C) Section 73 (D) Section 75
(AMF–M] [P.T.O. 25
Text of page 26
M
189. Which is used to store critical pieces of data during subroutines and interrupts?
(A) Stacks (B) Queues
(C) Accumulators (D) Data registers
190. The leakage flux in a transformer depends upon the value of
(A) Frequency (B) Mutual Flux
(C) Applied voltage (D) Load current
191. AC regulators are widely used in
(A) traction drives
(B) fan drives
(C) synchronous motor drives
(D) slip power recovery scheme of slip-ring induction motor
π
192. The period of the sequence cos n is
4
(A) 1/8 s (B) 8s
(C) 4s (D) It’s an aperiodic sequence
193. A 183 bus power system has 150 PQ buses and 32 PV buses. In the general case, to obtain the
load flow solution using Newton-Raphson method in polar coordinates, the minimum number
of simultaneous equations to be solved is:
(A) 664 (B) 332 (C) 166 (D) None
194. The function of the commutator in a DC machine is
(A) To change alternating current into direct current
(B) To improve commutation
(C) To ease speed control
(D) To change the alternating voltage to direct voltage
195. If two sinusoids of the same frequency but of different amplitudes and phase angles are
subtracted, the resultant is
(A) A sinusoid of the same frequency
(B) A sinusoid of half the original frequency
(C) A sinusoid of double the frequency
(D) Not a sinusoid
196. A control system whose step response is – 0.5(1+e–2t) is cascaded to another control block whose
impulse response is e–t. What is the transfer function of the cascaded combination?
1 1
(A) (B)
s (s + 2 ) (s + 1) (s + 2)
0.5 0.5
(C) (D)
s (s + 2 ) (s + 1) (s + 2)
26 (AMF–M] [Contd.
Text of page 27
M
197. The system is initially critical damped. If the gain of the system is doubled, then it will exhibit
(A) Overdamped characteristics (B) Critical damped characteristics
(C) Underdamped characteristics (D) undamped characteristics
198. If the supply polarity to the armature terminal of a separately excited d.c. motor is reversed, the
motor will run under
(A) Plugging condition (B) Regenerative braking condition
(C) Dynamic breaking condition (D)
Normal motoring condition
1
199. A system has an open loop transfer Function of s (1 + s ) (1 + 0.0 2s ) . The phase margin at closest
to which of the angles below?
(A) 35° (B) 30° (C) 45° (D) 50°
200. When the system gain is doubled the gain margin becomes
(A) Two times (B) Half times
(C) Remains constant (D) None of the above
201. Statement 1: Synchronous generator will not generate reactive power when a pure resistive load
is connected at the terminals
Statement 2: Synchronous generator will generate only active power when a pure resistive load
is connected at the terminals
Which of these statements is true?
(A) Statement 1 (B) Statement 2
(C) Both the statements (D) None
202. If the transmission lines are realized in nominal T-form, then a meshed 3-bus 3-line network will
have ___________ number of nodes.
(A) 3 (B) 6 (C) 9 (D) None
203. For long transmission line, the relay preferred will be:
(A) Ohm relay (B) Mho relay
(C) Buchhloz’s relay (D) None
204. A LTI system has the form
A = [0 0 1 0] , B = [1 0], C = [0, 1], D = 0.
The system in the above equation is………
(A) Only observable (B) Observable and Controllable
(C) Only controllable (D) Neither Observable nor controllable
(AMF–M] [P.T.O. 27
Text of page 28
M
205. For the system c(s) /R(s) = 16/(s2 +8s +16), the nature of the response will be
(A) Overdamped (B) Critical damped
(C) Underdamped (D) None of the mentioned
206. The series impedance matrix of a short three-phase transmission line in phase coordinates:
Zs Zm Zm
Z
m Zs Z m
Z m Zm Z s
If the positive sequence impedance is (1 + j 10) Ω, and the zero sequence is (4 + j 31) Ω, then the
imaginary part of Zm (in Ω) is:
(A) 3.5 Ω (B) 0Ω
(C) 14Ω (D) 7Ω
207. The electrical frequency observed at the terminals of a 2-pole alternator running at 1440 rpm.
(A) 50 Hz (B) 24 Hz
(C) 40 Hz (D) 25 Hz
208. Active and reactive power quantities associated with a synchronous machine will be governed
by ______________ and ___________ , respectively.
(A) quadrature axis, rotor axis (B) rotor axis, quadrature axis
(C) rotor axis alone (D) quadrature axis alone
209. The characteristic equation is s3 +14s2 + (45+k)s + K = 0, centroid is located at (–x,0) then the
value of x is,
(A) 4 (B) 3 (C) 2 (D) 1
210. The time required for the response to reach half the final value the very first time, is called
(A) Delay time (B) Half peak time
(C) Settling Time (D) Half Peak overshoot
211. The characteristic equation of the system is given as s4 + 12s3 + 64s2 + 128s + K. Consider K as
parameter for the root locus plot. The center of the asymptotes is
(A) –1 (B) – 1.33 (C) –3 (D) –4
212. The fully controlled thyristor converter in the figure is fed from a single-phase source. When the
firing angle is 0°, the DC output voltage of the converter is 300 V. What will be the output voltage
for a firing angle of 60°, assuming continuous conduction?
(A) 300 (B) 150 (C) 200 (D) 700
28 (AMF–M] [Contd.
Text of page 29
M
213. The load characteristics of dc shunt generator are determined by
(A) The voltage drop in armature resistance
(B) The voltage drop due to armature reaction, the voltage drop due to decreased field current
and voltage drop in armature resistance
(C) The voltage drop due to armature reaction and voltage drop in an armature resistance
(D) The voltage drop due to the armature reaction, the voltage drop due to decreased field
current and voltage drop in armature resistance and field resistance.
214. In State space representation, an Nth order differential equation can be represented with _____
equations each of ____ order,
(A) N, N (B) 1, 1 (C) 1, 2N (D) N, 1
k
215. What is the type of closed loop system for the plant transfer function G(s) = 2 and with
s (1 + T s )
unity feedback?
(A) 1 (B) 0 (C) 3 (D) 2
216. Statement 1: In a transmission line, inductive reactance is dominated than line resistance
Statement 2: In a distribution line, line resistance is dominated than line reactance
Statement 3: Line to ground capacitance can be ignored in a distribution line
Statement 4: Line to ground capacitance cannot be ignored in a long transmission line
Which of these statements is false?
(A) Statements 1 & 2 (B) Statement 2
(C) Statement 3 (D) None
217. The steady-state frequency of a large power system with multiple generators is given as:
N
1 N 1 N ∑H ω i i
(A) ∑ ωi
N i =1 (B) ∑ H iωi
N i =1 (C)
i =1
N (D) None
∑H
i =1
i
218. Statement 1: The reactive power drawn by an induction motor will be same irrespective of load
torque.
Statement 2: The active power drawn by an induction motor will be same irrespective of load
torque.
Statement 3: The reactive power drawn by an induction motor varies with the variation of load
torque.
Statement 4: The active power drawn by an induction motor varies with the variation of load
torque.
Which of these statements are true?
(A) Statements 1 & 2 (B) Statements 2 & 3
(C) Statements 1 & 4 (D) Statements 2 & 4
(AMF–M] [P.T.O. 29
Text of page 30
M
219. A network has 10 nodes and 17 branches. The number of different node pair voltages would be
(A) 7 (B) 9 (C) 90 (D) 45
s+7
220. If a system is represented by G(s)H(s) = k , what would be its magnitude at ω = ∞?
s (S + 3 ) (s + 2 )
(A) ∞ (B) 0 (C) 7 (D) 21
10
221. With regard to the filtering capacity the lead compensator and lag compensator are respectively:
(A) Low pass and high pass filter (B) Both low pass filters
(C) Both high pass filters (D) High pass and low pass filter
222. If the primary line voltage rating is 3.3 kV (Y side) of a 25 kVA star-delta transformer
(the per phase turns ratio is 5:1), then the line current rating of the secondary side (in Amperes)
is ______.
37 74
(A) 74 A (B) (C) 37 A (D)
3A 3A
223. The frequency of rotation of negative sequence component will be ___________.
(A) Same as fundamental frequency (B) Half of fundamental frequency
(C) Twice of fundamental frequency (D) zero
224. A 200 V dc machine has an armature resistance of 0.5 ohm. If the full load armature current is
30 Amp, the induced emf when the machine acts as (i) motor, (ii) generator will be
(A) 185, 215 (B) 170, 230 (C) 175, 225 (D) 120, 210
225. A 500 MW, 21kV, 50 Hz, 3-phase, 2–pole synchronous generator having a rated power factor
of 0.9, has a moment of inertia of 0.0275 kg-m2. The inertia constant (H) will be:
(A) 5.42 s (B) 2.71 s (C) 4.88 s (D) 2.44 s
226. A freewheeling diode connected across an inductive load is
(A) To restore conduction angle on phase (B) To avoid negative reversal voltage drop
(C) To reduce the PRV (D) All of the above
227. The low frequency and high frequency asymptotes of Bode magnitude plot are respectively
– 60 db/decade and – 40 db/decade. What is the type of system?
(A) 3 (B) 2 (C) 1 (D) 0
228. With regard to filtering property, the lead compensator is
(A) Low pass filter (B) Band pass filter
(C) High pass filter (D) Band reject filter
229. The highest speed attainable by DC shunt motor is
(A) Much higher than the no-load speed (B) Equal to no-load speed
(C) Much lower than the no-load speed (D) Ideally infinite
30 (AMF–M] [Contd.
Text of page 31
M
230. Which of the following statement is true about Thyristor?
(A) The turn-off time of a thyristor is less than the turn-on time
(B) The turn-on time is less than the turn-off time
(C) The turn-off time for the line commutation is less than the forced commutation
(D) None of the above
231. The discrete time function defined as u(n) = 1 for n ≥ 0 ; = 0 for n < 0 is an:
(A) Unit sample signal (B) Unit step signal
(C) Unit ramp signal (D) None of the mentioned
232. Statement 1: The admittance matrix will be singular for a power system network which is not
having any shunt element.
Statement 2: The admittance matrix will be non-singular for a power system network which is
not having any shunt element
Which of the aforementioned statements is true?
(A) Statement 1 (B) Statement 2
(C) Both statements (D) Neither Statement 1 nor Statement 2
233. In Fast-decoupled load flow solution, the coupled effect of following variables is neglected.
(A) Active power-Voltage angle, Reactive power-Voltage magnitude
(B) Active power-Voltage magnitude, Reactive power-Voltage angle
(C) Active power-Reactive power, Voltage magnitude-Voltage angle
(D) None
234. Differential protection scheme is employed for the detection of __________ fault.
(A) Transformer (B) Line
(C) Alternator winding (D) Internal fault
235. In DC chopper, per unit ripple is maximum when duty cycle α is
(A) 0.1 (B) 0.3 (C) 0.5 (D) 0.7
236. Which of the given losses is directly proportional to the square of speed?
(A) Windage Loss (B) Eddy current Loss
(C) Both Windage and eddy current loss (D) Hysteresis loss and brush loss
237. Pure inductive circuit
(A) Consumes some power on average
(B) Does not take power at all from a line
(C) Takes power from the line during some part of the cycle and then returns back to it during
another part of the cycle
(D) None of the above
(AMF–M] [P.T.O. 31
Text of page 32
M
238. What do the high pass filters generally comprise of?
(A) Capacitive series arm & Inductive series arm
(B) Capacitive series arm & Inductive shunt arm
(C) Capacitive shunt arm & Inductive shunt arm
(D) Capacitive shunt arm & Inductive series arm
239. Dynamic braking can be used for which of the following?
(A) Shunt Motors (B) Series Motors
(C) Compound Motors (D) All options are correct
240. The Ward-Leonard system is used for controlling the speed of
(A) DC motors (B) Single Phase AC motor
(C) Three phase motors (D) Universal Motors
241. A minimum phase digital filter has all of its zeros
(A) Outside unit circle
(B) Inside the unit circle
(C) Either inside the unit circle or outside the unit circle
(D) On the unit circle.
242. Cooley-Tukey N-point FFT algorithm requires the following number of complex multiplications:
(A) N2 (B) N/2 log2(N)
(C) N log2(N) (D) N/2 log10(N)
243. A triac
(A) Conducts when not triggered in both directions
(B) Conducts when not triggered
(C) Conducts when triggered in one direction
(D) None of the above
V (s ) (S + 3 )
244. The system function N (s ) = = . The system is initially at rest. If the excitation i(t)
I (S ) (4S + 5)
is a unit step, which of the following is the final value?
3 1
(A) 0 (B) 1 (C) (D)
5 4
245. The Windowing technique is associated with design of
(A) Analog filters (B) IIR digital filters
(C) FIR digital filters (D) All of the above
32 (AMF–M] [Contd.
Text of page 33
M
246. The loss associated with the mechanical friction of a machine is called
(A) Eddy current Loss (B) Mechanical Loss
(C) Hysteresis Loss (D) Stray Load loss
247. What will be the value of equivalent single source, if the two voltage sources connected in series
combination possess equal or similar polarity?
(A) Addition of two sources with opPosite polarity
(B) Addition of two sources with polarities similar to that of two sources
(C) Difference between the two sources with polarities similar to that of two sources
(D) Difference between the two sources with polarities similar to that of greater among the two
sources
248. Steady state error of Type-1 system in terms of Gain K for a ramp input is
1
(A) 0 (B) K (C) K
(D) Infinity
249. The following non-linearity is present in an Electric Machine
(A) hysteresis (B) Saturation
(C) Both of the above (D) None of the above
250. A load bus with voltage support/control can be treated as ________
(A) PQ bus (B) PV bus
(C) Slack bus (D) None
251. Statement 1: A three-phase unbalanced system with ungrounded/floating star will have no zero
sequence current
Statement 2: Zero sequence current components will appear in line currents for an unbalanced
system with ungrounded/floating star configuration.
Which of the statements is true?
(A) Statement 1 (B) Statement 2
(C) Both the statements (D) None
252. What would be the value of power factor for series RLC circuit under the resonance phenomenon?
(A) 0 (B) 0.5 (C) 1 (D) Infinity
253. A phase lead compensation network is to be formed using resistance and capacitances. How
many minimum number of resistor and capacitor are needed?
(A) 1 Resistor and 1 Capacitor (B) 2 Capacitors and 1 Resistor
(C) 1 Capacitor and 2 Resistors (D) 2 Capacitors and 2 Resistors
(AMF–M] [P.T.O. 33
Text of page 34
M
254. The units of inertia constant are:
(A) Joule (B) Hertz
(C) Joule/sec (D) Sec.
255. The preferred transmission system above break-even distance:
(A) AC transmission (B) DC transmission
(C) Hybrid AC-DC transmission (D) None
256. In a step-up chopper circuit, if Vs is the source voltage and α is duty cycle, then the output
voltage is
(A) Vs/(1 + α) (B) Vs(1 + α)
(C) Vs(1 − α) (D) Vs/(1 − α)
257. What is the Nyquist rate for the signal x (t) = cos200πt ?
(A) 2kHz (B) 4kHz
(C) 12kHz (D) 6kHz
258. The secondary winding of which of the following transformers is always kept closed?
(A) Current transformer (B) Voltage transformer
(C) Power transformer (D) Stepdown transformer
259. The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no. of roots
in the right half of the s-plane is
(A) 2 (B) 3 (C) 4 (D) 0
260. A proportional plus derivative controller
(A) has high sensitivity (B) increases the stability
(C) makes system unstable (D) improves the steady state accuracy
261. An electro-magnetic relay is provided with additional coil/shading coil so as to minimize
(A) Cost (B) Weight
(C) Losses (D) Pulsating torque
262. Loss of synchronism is related to
(A) Active power (B) Current
(C) Frequency (D) Reactive power
34 (AMF–M] [Contd.
Text of page 35
M
263. If an alternator is supplying load of 350 kW at 0.6 pf lagging and its power factor is raised
to unity then to supply the alternator for the same kVA loading, the extra required kilowatts
will be
(A) 205 kW (B) 212 kW
(C) 233 kW (D) 246 kW
264. The steady state error due to ramp input for a type two system is equal to
(A) Zero (B) Infinite
(C) Non-zero number (D) Constant
265. The concept of locus diagram is applied to:
(A) Steady state stability limit (B) Surge impedance loading
(C) Power system protection (D) None
266. When the firing angle α of a single phase fully controlled rectifier feeding constant dc current
into the load is 30°, the displacement factor of the rectifier is
(A) 2 (B) 5 (C) 3/ 2 (D) 2/3
267. Equalizing circuits are provided across each SCR in series operation to provide uniform
(A) Current distribution (B) Voltage distribution
(C) Firing of SCRs (D) All of the above
268. The Interpoles in the DC Machine has a tapering shape in order to
(A) Reduce the overall weight
(B) Reduce the saturation in the interpole
(C) Economise of the material required for the interpoles
(D) Increase the acceleration of commutation
(s + a )
269. The Phase of lead compensator of the system G(s) = is at its maximum at:
(s + b )
a a
(A) ab (B) (C) (D) ab
b b
270. Under frequency relays will be a part of:
(A) Apparatus protection (B) System protection
(C) Transformer protection (D) None
(AMF–M] [P.T.O. 35
Text of page 36
M
271. Which of these components are negligible in a balanced three phase system?
(A) Positive sequence (B) Negative sequence
(C) Zero sequence (D) Both (B) & (C)
272. Armature reaction effect is more in
(A) Field weakening Method (B) Armature resistance control
(C) Same in both method (D) All of the above
273. Lead compensator is used to improve _________
(A) Transient Response (B) Steady state response
(C) Both (A) & (B) (D) None of the above
274. Adding a pole to the open loop transfer function has the effect of pulling the root locus to the
________ the settling of the response.
(A) Left and slow down (B) Right and speeds up
(C) Left and speeds up (D) Right and slow down
275. A fuse has:
(A) Linear characteristics
(B) Inverse time characteristics
(C) No characteristics
(D) Exhibits both linear and non-linear characteristics.
276. Negative sequence relay is employed for:
(A) Alternator protection (B) Feeder protection
(C) Transformer protection (D) Transmission line
1
277. The system with the open loop transfer function is
s (s + 1)
(A) Type 2 and order 1 (B) Type 1 and order 1
(C) Type 0 and order 0 (D) Type 1 and order 2
(s + 1)
278. The polar plot of the transfer function G(s) = will be in which quadrant?
(S + 2 ) (s + 3 )
(A) First Quadrant (B) Second Quadrant
(C) Third Quadrant (D) Fourth Quadrant
36 (AMF–M] [Contd.
Text of page 37
M
279. The even part of a signal x(t) is:
(A) x(t) + x(– t) (B) x(t) – x(– t)
(C) (1/2)*(x(t)+x(– t)) (D) (1/2)*(x(t) – x(– t))
280. Which one of the following is the mathematical representation for the average power of the
signal x(t)?
1 T 1 T 2
T ∫0 T ∫0
(A) x (t ) d t (B) x (t ) d t
1 T/ 2 1 T2 2
T ∫− T2
x (t ) d t
T ∫− T / 2
(C) x (t ) d t (D)
281. IGBT and MOSFET are _________ and ___________ controlled devices
(A) voltage and voltage (B) voltage and current
(C) current and voltage (D) current and current
282. Equal-area criterion is applicable to:
(A) Two-machine infinite bus system (B) Multi-machine infinite bus system
(C) Single-machine infinite bus system (D) None
283. Nodal analysis can be applied for
(A) planar networks.
(B) non-planar networks.
(C) both planar and non-planar networks.
(D) neither planar nor non-planar networks.
284. The thyristor is turned off when the anode current falls below_____
(A) Holding current (B) Forward current
(C) Latching current (D) Breakover current
285. In a thyristor the ratio of latching current to holding current is
(A) 2.7 (B) 1 (C) 0.5 (D) 5
286. When thyristor and transistor as a switch are compared, the true statement is
(A) Thyristor requires turns off circuit while transistor does not
(B) The voltage drop of the thyristor is less than transistor
(C) Thyristor requires a continuous gate current
(D) Transistor does not draw continuously base current
(AMF–M] [P.T.O. 37
Text of page 38
M
287. A Shunt motor running at 1000 rpm generated emf of 100 V. If the speed increases to 1200 rpm,
the generated emf is
(A) 140 V (B) 120 V (C) 240 V (D) 360 V
288. In which of the following voltage sources is the movement of conductors in a magnetic field used
to produce voltage?
(A) Transformer (B) D.C. Motor
(C) D.C. generator (D) Zinc-copper element
289. A bus or node in a power system network refers to:
(A) Capacitor bank (B) Alternator
(C) Compensator (D) Sub-station
290. The current flowing in the conductors of a DC motor is
(A) D.C. (B) A.C.
(C) D.C. as well as A.C. (D) Transients
291. An e.m.f. is induced in the windings of an armature of a DC generator when the armature
rotates in
(A) Alternating magnetic flux (B) Magnetic field
(C) Electrostatic field (D) Electromagnetic flux
292. Consider the following systems:
1 1
System 1: G(s) = and System 2: G(s) = . The true statement regarding the
( 2s + 1) (5s + 1)
system is:
(A) Bandwidth of the system 1 is greater than the bandwidth of system 2
(B) Bandwidth of the system 1 is lower than the bandwidth of system 2
(C) Bandwidth of both the system are same
(D) Bandwidth of both the system are infinite
293. Let P = Number of open loop poles and Z = Number of open loop zeros and P > Z, find number
of branches terminating at ∞ .
(A) Z (B) P–Z
(C) P (D) None of the above
294. Which of the following statements is correct for system with gain margin close to unity or a
phase margin close to zero?
(A) The system is relatively stable (B) The system is highly stable
(C) The system is highly oscillatory (D) The system is stable
38 (AMF–M] [Contd.
Text of page 39
M
295. A system has poles at 0.01 Hz and 80 Hz, zeroes at 5 Hz, 100 Hz, 200 Hz. The approximate phase
of the system response at 20 Hz is
(A) – 90° (B) 0°
(C) 90° (D) – 180°
296. The possible phase shift in a Y-Y power transformer are
(A) 0 and 90 (B) 0 and 180
(C) 0 and 270 (D) None
297. The power and current drawn by an electric bulb are 100 W and 0.5 A, respectively when a
supply of 200 V is given to it. Calculate the current drawn by the bulb when the supply is 100 V
when acting as constant power load and constant impedance load, respectively.
(A) 1 and 0.25 A (B) 0.25 and 1 A
(C) 1 and 0.5 A (D) 0.5 and 1 A
298. Why sinusoidal signal is preferred for power generation, transmission and distribution?
(A) it can be easily generated
(B) retains its shape after performing integration and/or differentiation
(C) generating sinusoidal waveform is the only possibility at power frequency
(D) none of the above
299. Load on an Electric Machine can be increased by
(A) increasing resistance (B) decreasing resistance
(C) decreasing current (D) increasing current
300. In lap winding, the number of brushes is equal to
(A) two (B) four
(C) number of poles (D) twice the number of poles
________________
(AMF–M] [P.T.O. 39
Text of page 1
Gujarat Public Service Commission
Assistant Engineer (Electrical), Class-II, Road and Building Department,
Advt. No. 82/ 2019-20 P.T. Date :01-03-2020 (AMF) Series : A
F I N A L A N S W E R K E Y For Question No. 001 - 300 is declared as below
Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer
1 C 31 C 61 C 91 D 121 B 151 A 181 D 211 D 241 B 271 A
2 B 32 C 62 A 92 C 122 B 152 C 182 A 212 C 242 C 272 C
3 B 33 B 63 B 93 A 123 B 153 C 183 C 213 C 243 C 273 C
4 B 34 B 64 D 94 B 124 D 154 A 184 C 214 A 244 D 274 A
5 B 35 D 65 D 95 D 125 A 155 D 185 B 215 C 245 B 275 A
6 C 36 A 66 C 96 C 126 B 156 B 186 D 216 * 246 D 276 A
7 B 37 A 67 C 97 B 127 C 157 D 187 C 217 B 247 A 277 B
8 D 38 D 68 B 98 C 128 A 158 D 188 D 218 B 248 A 278 C
9 D 39 C 69 B 99 B 129 C 159 A 189 B 219 D 249 A 279 D
10 A 40 C 70 A 100 D 130 B 160 A 190 A 220 B 250 D 280 B
11 D 41 D 71 D 101 D 131 C 161 A 191 D 221 B 251 D 281 B
12 B 42 D 72 B 102 A 132 B 162 C 192 A 222 A 252 C 282 B
13 C 43 C 73 D 103 C 133 D 163 C 193 D 223 B 253 C 283 A
14 * 44 B 74 D 104 A 134 D 164 D 194 D 224 C 254 A 284 C
15 A 45 A 75 B 105 A 135 B 165 A 195 C 225 A 255 D 285 C
16 B 46 A 76 D 106 D 136 D 166 D 196 A 226 B 256 A 286 B
17 A 47 C 77 C 107 B 137 C 167 C 197 D 227 A 257 A 287 B
18 D 48 D 78 D 108 B 138 B 168 C 198 C 228 B 258 C 288 C
19 A 49 C 79 B 109 A 139 A 169 D 199 D 229 D 259 B 289 C
20 B 50 A 80 B 110 A 140 A 170 D 200 A 230 C 260 B 290 B
21 C 51 C 81 A 111 A 141 D 171 C 201 B 231 D 261 D 291 C
22 D 52 A 82 D 112 D 142 A 172 A 202 A 232 A 262 B 292 B
23 B 53 A 83 D 113 B 143 C 173 C 203 B 233 A 263 B 293 B
24 B 54 D 84 D 114 C 144 B 174 A 204 D 234 D 264 B 294 D
25 C 55 D 85 C 115 B 145 C 175 C 205 C 235 B 265 B 295 D
26 B 56 A 86 B 116 C 146 A 176 D 206 C 236 A 266 D 296 D
27 B 57 C 87 B 117 A 147 B 177 B 207 C 237 D 267 D 297 C
28 D 58 C 88 B 118 C 148 B 178 C 208 B 238 D 268 B 298 C
29 A 59 B 89 C 119 B 149 B 179 A 209 D 239 C 269 C 299 D
30 D 60 B 90 D 120 A 150 B 180 D 210 A 240 D 270 A 300 B
* Cancelled Question(s)
GANDHINAGAR Date : 19-06-2020
Text of page 2
Gujarat Public Service Commission
Assistant Engineer (Electrical), Class-II, Road and Building Department,
Advt. No. 82/ 2019-20 P.T. Date :01-03-2020 (AMF) Series : B
F I N A L A N S W E R K E Y For Question No. 001 - 300 is declared as below
Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer
1 A 31 D 61 C 91 D 121 D 151 D 181 A 211 D 241 D 271 D
2 D 32 D 62 D 92 B 122 A 152 A 182 C 212 A 242 C 272 C
3 D 33 C 63 B 93 D 123 C 153 D 183 C 213 A 243 C 273 C
4 D 34 B 64 B 94 D 124 A 154 D 184 D 214 D 244 A 274 A
5 C 35 A 65 C 95 B 125 A 155 C 185 A 215 B 245 D 275 C
6 B 36 A 66 B 96 D 126 D 156 A 186 D 216 A 246 A 276 *
7 B 37 C 67 B 97 C 127 B 157 D 187 C 217 D 247 A 277 B
8 B 38 D 68 D 98 D 128 B 158 C 188 C 218 D 248 C 278 B
9 C 39 C 69 A 99 B 129 A 159 D 189 D 219 C 249 B 279 D
10 D 40 A 70 D 100 B 130 A 160 A 190 D 220 D 250 B 280 B
11 C 41 C 71 D 101 D 131 D 161 B 191 C 221 B 251 C 281 D
12 C 42 A 72 B 102 A 132 A 162 B 192 A 222 A 252 B 282 B
13 B 43 A 73 C 103 C 133 C 163 B 193 C 223 B 253 B 283 B
14 B 44 D 74 * 104 C 134 B 164 D 194 A 224 D 254 D 284 B
15 D 45 D 75 A 105 B 135 C 165 A 195 C 225 C 255 D 285 B
16 A 46 A 76 B 106 D 136 A 166 B 196 D 226 C 256 D 286 D
17 A 47 C 77 A 107 C 137 B 167 C 197 B 227 C 257 C 287 D
18 D 48 C 78 D 108 D 138 B 168 A 198 C 228 B 258 C 288 B
19 C 49 B 79 A 109 B 139 B 169 C 199 A 229 D 259 D 289 C
20 C 50 B 80 B 110 A 140 B 170 B 200 D 230 A 260 B 290 A
21 C 51 D 81 C 111 C 141 A 171 A 201 B 231 B 261 B 291 A
22 B 52 C 82 A 112 B 142 C 172 D 202 B 232 C 262 A 292 C
23 B 53 A 83 B 113 D 143 C 173 B 203 A 233 C 263 B 293 C
24 B 54 B 84 D 114 D 144 A 174 C 204 C 234 D 264 C 294 A
25 B 55 D 85 D 115 B 145 D 175 B 205 C 235 B 265 A 295 A
26 C 56 C 86 C 116 D 146 B 176 C 206 B 236 D 266 B 296 A
27 B 57 B 87 C 117 C 147 D 177 A 207 B 237 A 267 A 297 B
28 D 58 C 88 B 118 B 148 D 178 C 208 C 238 A 268 B 298 C
29 D 59 B 89 B 119 A 149 A 179 B 209 C 239 A 269 D 299 D
30 A 60 D 90 A 120 A 150 A 180 A 210 B 240 D 270 C 300 B
* Cancelled Question(s)
GANDHINAGAR Date : 19-06-2020
Text of page 3
Gujarat Public Service Commission
Assistant Engineer (Electrical), Class-II, Road and Building Department,
Advt. No. 82/ 2019-20 P.T. Date :01-03-2020 (AMF) Series : C
FINAL ANSWER K E Y For Question No. 001 - 300 is declared as below
Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer
1 C 31 D 61 D 91 C 121 A 151 D 181 D 211 D 241 B 271 B
2 A 32 C 62 B 92 C 122 D 152 A 182 A 212 B 242 A 272 B
3 A 33 A 63 D 93 B 123 B 153 C 183 C 213 B 243 B 273 A
4 D 34 B 64 D 94 B 124 C 154 A 184 B 214 B 244 C 274 C
5 D 35 D 65 B 95 D 125 B 155 A 185 C 215 B 245 A 275 C
6 A 36 C 66 D 96 A 126 C 156 D 186 A 216 D 246 B 276 B
7 C 37 B 67 C 97 A 127 A 157 B 187 B 217 D 247 A 277 B
8 C 38 C 68 D 98 D 128 C 158 B 188 B 218 B 248 B 278 C
9 B 39 B 69 B 99 C 129 B 159 A 189 B 219 C 249 D 279 C
10 B 40 D 70 B 100 C 130 A 160 A 190 B 220 A 250 C 280 B
11 C 41 C 71 A 101 A 131 D 161 C 191 C 221 D 251 B 281 B
12 A 42 D 72 D 102 C 132 A 162 A 192 B 222 C 252 A 282 C
13 B 43 B 73 D 103 C 133 D 163 C 193 D 223 C 253 B 283 C
14 D 44 B 74 D 104 A 134 D 164 A 194 D 224 A 254 D 284 D
15 D 45 C 75 C 105 D 135 C 165 C 195 B 225 C 255 C 285 B
16 C 46 B 76 B 106 B 136 A 166 D 196 D 226 * 256 C 286 D
17 C 47 B 77 B 107 D 137 D 167 B 197 C 227 B 257 C 287 A
18 B 48 D 78 B 108 D 138 C 168 C 198 B 228 B 258 B 288 A
19 B 49 A 79 C 109 A 139 D 169 A 199 A 229 D 259 D 289 A
20 A 50 D 80 D 110 A 140 A 170 D 200 A 230 B 260 A 290 D
21 D 51 C 81 D 111 A 141 B 171 D 201 D 231 C 261 A 291 D
22 B 52 B 82 D 112 C 142 B 172 A 202 C 232 B 262 C 292 A
23 C 53 B 83 C 113 C 143 B 173 C 203 C 233 B 263 C 293 A
24 * 54 B 84 B 114 D 144 D 174 C 204 A 234 D 264 A 294 D
25 A 55 B 85 A 115 A 145 A 175 B 205 D 235 D 265 A 295 B
26 B 56 C 86 A 116 D 146 B 176 D 206 A 236 D 266 A 296 A
27 A 57 B 87 C 117 C 147 C 177 C 207 A 237 C 267 B 297 D
28 D 58 D 88 D 118 C 148 A 178 D 208 C 238 C 268 C 298 D
29 A 59 D 89 C 119 D 149 C 179 B 209 B 239 D 269 D 299 C
30 B 60 A 90 A 120 D 150 B 180 A 210 B 240 B 270 B 300 D
* Cancelled Question(s)
GANDHINAGAR Date : 19-06-2020
Text of page 4
Gujarat Public Service Commission
Assistant Engineer (Electrical), Class-II, Road and Building Department,
Advt. No. 82/ 2019-20 P.T. Date :01-03-2020 (AMF) Series : D
FINAL ANSWER K E Y For Question No. 001 - 300 is declared as below
Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer Q.No. Answer
1 D 31 C 61 C 91 C 121 C 151 B 181 A 211 B 241 C 271 D
2 D 32 C 62 B 92 A 122 A 152 B 182 D 212 B 242 B 272 B
3 C 33 B 63 B 93 A 123 C 153 B 183 B 213 A 243 B 273 B
4 B 34 B 64 B 94 D 124 A 154 D 184 C 214 C 244 D 274 B
5 A 35 D 65 B 95 D 125 C 155 A 185 B 215 C 245 D 275 B
6 A 36 A 66 C 96 A 126 D 156 B 186 C 216 B 246 D 276 D
7 C 37 A 67 B 97 C 127 B 157 C 187 A 217 B 247 C 277 D
8 D 38 D 68 D 98 C 128 C 158 A 188 C 218 C 248 C 278 B
9 C 39 C 69 D 99 B 129 A 159 C 189 B 219 C 249 D 279 C
10 A 40 C 70 A 100 B 130 D 160 B 190 A 220 B 250 B 280 A
11 A 41 D 71 C 101 D 131 C 161 D 191 A 221 A 251 B 281 D
12 D 42 C 72 A 102 A 132 B 162 A 192 C 222 C 252 A 282 C
13 D 43 A 73 B 103 C 133 D 163 C 193 C 223 C 253 B 283 C
14 D 44 B 74 D 104 B 134 D 164 A 194 A 224 A 254 C 284 A
15 C 45 D 75 D 105 C 135 B 165 A 195 D 225 A 255 A 285 C
16 B 46 C 76 C 106 A 136 D 166 D 196 B 226 A 256 B 286 *
17 B 47 B 77 C 107 B 137 C 167 B 197 D 227 B 257 A 287 B
18 B 48 C 78 B 108 B 138 B 168 B 198 D 228 C 258 B 288 B
19 C 49 B 79 B 109 B 139 A 169 A 199 A 229 D 259 D 289 D
20 D 50 D 80 A 110 B 140 A 170 A 200 A 230 B 260 C 290 B
21 D 51 C 81 D 111 D 141 D 171 A 201 B 231 D 261 B 291 D
22 B 52 D 82 B 112 A 142 A 172 C 202 C 232 A 262 A 292 C
23 D 53 B 83 C 113 C 143 D 173 C 203 C 233 A 263 B 293 C
24 D 54 B 84 * 114 C 144 D 174 D 204 D 234 D 264 D 294 A
25 B 55 C 85 A 115 B 145 C 175 A 205 B 235 B 265 C 295 D
26 D 56 B 86 B 116 D 146 A 176 D 206 D 236 A 266 C 296 A
27 C 57 B 87 A 117 C 147 D 177 C 207 A 237 D 267 C 297 A
28 D 58 D 88 D 118 D 148 C 178 C 208 A 238 D 268 B 298 C
29 B 59 A 89 A 119 B 149 D 179 D 209 A 239 C 269 D 299 B
30 B 60 D 90 B 120 A 150 A 180 D 210 D 240 D 270 A 300 B
* Cancelled Question(s)
GANDHINAGAR Date : 19-06-2020Page 1 of 39
Source: Gujarat Public Service Commission. Question paper published by Gujarat Public Service Commission.