JPSC Assistant Engineer 2021: Assistant Engineer Written Exam, Advt. No. 08/2018 and 08/2019, CIVIL ENGINEERING PAPER-I-SUBJECT-CODE-08
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Total No. of printed Pages - 6
AEUD
CIVET ENGINEERING
PAPHR-I
SUBJECT CODE : 08
Full Marks : 200 Time : 3 Hours
Irstruetioas For Candidates :
PleasereadeachOfthefollowingiustructiouscarefullybeforeattemptingquestious.
(1) Ariswers must be written in ENGLISH only.
(2) The question paper contalus a total Of 8 questions in TWO Sections : Section-A
and Section-B. q70UR questions in each section)
(3) Question No.1 Of section `A' and Question No. 5 Of section `B' are compulsory.
(4) Candidates have to atterxpt another TIIREE questions from remaining Sin
questions choosing atleast ONE question from each section.
(5) Assume suitable data if f ound necessary.
(6) Wherever any assumption be made for answering a question, they must be
clearly indicated.
q) Marks carried by a question / section is indicated againt it.
(8) Unless struck of f ; attempt of question shall be counted even if attempted partly.
(9) Any page or portion of the page lef i blank in the Answer Booklet r"st be clearly
st"ck off
SECTION-A
Marks
8
(i) Writeshortnoteson:
(a) Defects intimber
a) Plywood
(c) Seasoning of timber
(d) Preservation oftinber
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AEUD (08)
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(ii) Calculate the total elongation of a prismatic bar of length J and cross sectional
area `A' which hangs vertically under its own weight.
(iii) Analyze the continuous beam shorn in Fig. 1 (iii) by Moment Distribution
Method and find the Moment at various points A, a and C.
I - Constant
Fig. 1 (iii)
(iv) Find the centroid of a 120 mm x 150 mm x 20 mm T section.
(v) State the Muller Breslau principle and its applications.
(i) What is rapid hardening cement? What is its sigrificance? How does it differ
from ordinary Portland cement ? 15
(ii) Find the deflection at free end of a cantilever beam of length J, loaded with .10
triangular load, w per unit length at fixed end and zero at free end.
(iii) A solid shaft of aluminum of length 1.5 in and of 60 mm diameter is to be
replaced by a tabular steel shaft of the same length and the sane outside
diameter, such that each of two shafts have the same angle of twist per unit
torsional moment over the total length. Determine the irmer dianeter of the
tubular steel shaft, if the modulus of riSdity of steel is three times that of
-urn. 15
3. (i) Explain various ingredients of brick earth work and state different types of
10
bricks as per hdian Standard code ?
(fi) A timber beam of rectangular section is to support a load of 25 kN (uniformly
distributed) over a span of 4 in. If the depth of the section is to be twice the
breadth, and the stress in the timber is not to exceed 50 N/mm2, find the
dimensions of the cross section.
How the cross-section of the beam would be modify if it were a concentrated
20
load placed at the centre with the same ratio of breadth to depth.
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AEun (08)
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(iii) Find the collapse load factor for the fixed bean (fixed at both end) of length /
loaded with unifomly distributed load of w/unit length all over the span. Fully
10
plasticmomentofsectionisMp.
Fig. 3 (iii)
4. (i) A Continuous bean ABC is simply supported at A, a and C as shown in
Fig 4 (i). The support C is yielding and settles at the rate of 3 mm per 1000 kg.
El = 8 x 1010 kg¢m2. Analyze the beam and draw bending moment and shear
force diagrams. 30
Fig. 4 (i)
(ii) Show that for a rectangular section, the distribution of shearing stress is
10
parabolic.
SECTION-8
5. (i) Determine the rivetvalue of20 mm dianeterrivets cormecting 10 mm plate and
is in (a) single shear and a) double shear. The permissible stresses for rivets in
shear and bending are 80 rna and 250 rna respectively and for plate in bearing
is 250 rna.
(ii) The one-way slab of a reading room is estimated to have a thickness of 100 mm
along with thickness of finishing as 75 mm. The slab is to carry a live load of
4 kN/m2. Determine the factored loads (a) for strength, and a) for serviceability
limit states. Take Unit weight of concrete as 25 kN/m3 and finishing as
22 kN/m3 .
AEUD (08) Paper-I
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(iii) Calculate the strength of ISA 40 x 25, 6 - thick when used as a tension
member with its longer leg comected by
(a) 14 mm dianeterrivets
a) Filletweld
(iv) Design a balanced singly reinforced concrete bean section for an appfied
moment of 60 EN-in. The width of the bean is limited to 175 mm. Use M20
grade of concrete and Fe 415 steel bars.
(v) Followingdatapertaiustoaprojectnetwork.Drawthenetwork,computeproject
duration and indicate the critical path.
8 C D E F Dummy G
Activity A
A A C C D,E 8'Dummy
Dependence on
10 4 8 - 9
Duration, days 6 12 10
6. (i) Determine the size of the bolts required to comect the bracket to the column
showninFig.6(i).AlllineardimeusiousintheFig6(i)areinmm
v - 200 kN
ISSC 250 eh-250
r+H-
T - 12. 5+
40i I
I
II
''-
'r
:y
8
rJ I
+:i+ Gusset
aclC1
+:I :+I plate
11aCOt3 --+-ii-G-+--
+:i+
t +: i+
11I
tg-10
T40 1ro .I-
!! -'- Lg
8 - 250 Fe410 steel
Fig. 6 (i)
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AEUD (08)
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(ii`\ Acircularcolumn,4.6mhighiseffectivelyheldinpositionatboththeendsand
restrainedagaiustrotationatoneend.Designthecolumn,tocanyanaxialload
of1200kN,ifitsdiameterisrestrictedto450min.UseM20gradeofconcrete
20
and Fe 415 steel.
7. (i) Determinethedesigntensilestrengthofplate(160rmx8mm)comectedto10
mmthickgussetplateusing16mmboltsasshouninFig.7(i).Iftheyieldand
ultimatestressofthesteelare250Mpaand410Mparespectively,for following
Case
(a) Gross section yielding
20
a) Netsectionrupture
Fig. 7 (i)
(ii) Arectangularconcretebean150mmwideand300mmdeepisprestressedbya
straight cable carrying an effective prestressing force of 225 kN at an
eccentricity of 50 mm. The bean supports a uniformly distributed load Of
72kN/minclusiveoftheselfweightofthebear.Spanofthebeanis5m.If
themodulusofruptureofconcreteis5N/mm2,calculatetheloadfactoragainst
20
cracking.
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AEUD (08)
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8. (i) Drawthenetworkofthefollowingactivities.hdicatethecriticalpath.Node(1)
denotes start and Node (5) denotes end. Calculate total float, free float and
independent float values .
Activity1-2 Duration a}ays) Dependence (upon)
3 none
1-3 5 none
2-4 4 1-2
4-5 5 1 -3, 2 -4
8 1-3
3-5
(ii) Name the different concreting equipment Write the Purpose of any two 15
equipment.
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AEUI) (08)Official key not published for this paper.
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Source: Jharkhand Public Service Commission. Question paper published by Jharkhand Public Service Commission.