JPSC Assistant Engineer 2021: Assistant Engineer Written Exam, Advt. No. 08/2018 and 08/2019, CIVIL ENGINEERING PAPER-II-SUBJECT-CODE-09
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AEUD
CIVIL ENGINEERING
PAPER - 11
SUBJECT CODE : 09
Full Marks : 200 Time : 3 Hours
Instructions For Candidates :
Please read each Of the following irlstructions carefully bof;ore attempting questions.
(I) A:nswers must be written in ENGLISH only.
(2) The question paper contains a total Of 8 questions in TWO Se6tiors : Section-A
and Section-B. qTOUR questions in each section)
(3) Question No.1 Of section `A' and Qf testion No. 5 of section.B' are compulsory.
(4) Candidates have to attempt another THREE questions from remaining SET
questtous choosing atleast ONE question from each section.
(5) Assume suitable data if f ;ound necessary.
(6) Wherever arly assumption be made for answering a question. they must be
clearly indicated.
q) Marks carried by a question / section is indicated against it.
(8) Unless struck of f attenapt of question shall be counted even.lf attempted partly.
(9) Any page or portion of the page lei it blank in the Answer Booklet must be clearly
struck off:
SECTION-A Marks
(5 x 8 = 40)
1. ` (i) Differentiate betweenthe following set offluid properties :
(a) Specific weight and mass density
a) Cohesion and adhesion
(c) Surface tension and capillarity
(d) Dynamic viscosity and kinematic viscosity
(ii) A pipeline carrying water has surface roughness of average heicht 1.165 mm. If
the shear stress developed is 3.6 N/m2, what is the nature of the pipe surface ?
Find the shear velocity.
AEUD (09) Paper-H
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Marlrs
(iii) Define recurrence interval and return period of a storm.
(iv) Describe in brief the various types of cross-drainage works.
(v) Enumerate the merits and demerits of rapid and slow sand filters.
(a) A block of wood of specific gravity 0.7 floats in water. Determine the meta-
centric height of the block if its size is 2 in x 1 in x 0.8 in. (20)
a) Design a regime channel according to Lacey's silt theory for discharge of
35 m3/s with silt factor 1.0 by taking side slopes as 0.5 H : 1 V. (20)
3. (a) Derive Bemouni's equation of motion from Euler's equation. (10)
a)) Define Most Probable Number (MPN) and Colifom Index (CI). Discuss
membrane filtration technique. (15)
(c) Design a rectangular primary sedimentation tank for treating 1 million litres of
water per day (MLD) for the given design data :
Detention period = 2.5 hours
Velocity of flow = 8 cm/ininute and
Depth of water = 3 in (15)
4. (a) At an energy dissipater structure below a low spillway, the discharge is 19 m3/s
and the energy loss is 1 in at the hydraulic jump forming therein. Determine the
depth of flow at both ends of the junip by assuming a rectangular section. (20)
a) Design a turbine from the given data :
Head - 120m
Power produced = 5xl20Ow
Nos. of turbines -5
Head loss due to ffiction = 3%ofgrossheed
Length of each peustock - 1300m
Overall efficiency - 0.87
Nos. of pairs ofpoles -18
Speed = 166.7rpm
Breadth to diameter ratio -0.3
Darcy Weisbach a - 0.02
Determine the diameter of the penstock rurmer and type of turbine for speed
ratio `¢' of o.75. (20)
AEUD (09) Paper-H
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Marks
SECTION - 8 (5 x 8 - 40)
5. (i) Describe the method of garbage disposal from a town.
(ii) Explain the pollutants responsible for air and noise pollution.
(iii) Discuss in brief the consistency limits along with their significance.
(iv) What are the principles of surveying? Explain.
(v) Indicate the limitations of plate load test and how these are resolved.
6. (a) Explain the various zones of pollution in river stream with the importance of
re-orygeneration. de-oxygeneration and oxygen deficit in the problems of strean
sanitation. (20)
a) A 10 in thick clay layer with single drainage settles by 100 mm in 2 years. The
coefficient of consolidation for this clay was found to be 5 x 10-3 cm2/see.
Calculate the ultimate consolidation settlement and find its tine to undergo 90%
of this settlement. (20)
7. (a) Fouowingbearingshave beentakenonaclosedcompass traverse : (20)
Line F.B. 8.8.
AB 8ooi o. 259°0'
BC 120°20' 3 1 oo5oi
CD 170°50' 35oo5oi
DE 230°10' 49o3o'
EA 310°20' |3o°|5.
Calculate the interior angles and correct them for observational errors.
Considering the observed bearing of the line CD to be correct, adjust all other
side beaings.
(b) h a pair of overlapping vertical photographs, the mean distance between two
principal points both of which lie on the datum is 6.375 cm. At the time of taking
photograph. the air-craft was 600 in above the datum. The camera's focal length
is 150 in. In the common overlap a tall chimney 120 in high with its base in the
dat`m surface is observed. Find out the difference of parallax for top and bottom
ofchirmey. (20)
AEUD (09) Paper-II
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Marks
(a) A national highway passes through a rolhig terrain baving a horizontal curve of
radius 600 in. Design the length .of the transition curve and compute the shift
using the following data :
Design speed, V = 80 kmpb
Nomial pavement width = 7 in
No. of lanes, N = 2
Wheel base width, / = 6 in
Allowable rate of distribution of super elevation = 1 in 150
AHowable rate of change of centrifugal acceleration. C = 0.507 (20)
a) Find out the mainun pemissible speed on a curve of high speed B.G. track
having the following data :
Degree of the cone = |°
Amount of superelevtion = 8 cm
Length of transition curve = 130 in
Maximum speed of the section likely to be sanctioned = 153 kin/hour (20)
AEUD (09)
Paper-IIOfficial key not published for this paper.
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Source: Jharkhand Public Service Commission. Question paper published by Jharkhand Public Service Commission.