JLEE 2021
CIVIL ENGINEERING (TECHNICAL)
Answer Key
1. For a circular column having its ends hinged, the slenderness ratio is 160. The l/d ratio of the column is:
a) 80
b) 57
c) 40
d) 20
2. Which one of the following pairs is not correctly matched?
a) Lame’s constants: Thick cylinder
b) Macaulay’s method: Deflection of beam
c) Euler’s method: Theory of column
d) Eddy’s theorem: Torsion of shafts
3. A fluid in which shear stress is more than the yield value and proportional to the rate of shear strain is called:
a) Newtonian fluid
b) Non-Newtonian fluid
c) Ideal plastic fluid
d) Real fluid
4. For a floating body, buoyant force acts at the:
a) centroid of the floating body
b) centre of gravity of the body
c) centroid of the fluid vertically below the body
d) Centroid of the displaced fluid
5. The design value of lateral friction co-efficient on highway is:
a) 0.15
b) 0.50
c) 0.35
d) 1.5
6. Earthquake causes horizontal and vertical accelerations in the masonry structure. The magnitude of the forces induced in the structure depends on the:
a) age of the building
b) strength of mortar
c) type of roof
d) mass of the structure
7. The minimum number of bars required in a rectangular column for an earthquake resistance design, is:
a) 4
b) 6
c) 8
d) 10
8. A soil sample has a void ratio of 0.5 and its porosity will be close to:
a) 50%
b) 66%
c) 100%
d) 33%
9. The swelling nature of black cotton soil is primarily due to the presence of:
a) kaolinite
b) elite
c) montmorillonite
d) vermiculite
10. A good brick, when immersed in water bath for 24 hours, should not absorb more than:
a) 20% of its dry weight
b) 30% of its saturated weight
c) 10% of its dry weight
d) 20% of its saturated weight
11. A queen-post truss differs from a king-post truss in having two vertical posts, rather than one. The vertical posts are known as:
a) horizontal posts
b) inclined posts
c) king posts
d) queen posts
12. In a leveling work, sum of the back Sight (BS) and Fore Sight (FS) have been found to be 3.085 m and 5.645 m respectively. If the Reduced Level (RL) of the starting station is 100.000 m, the RL (in m) of the last station is:
a) 98.66
b) 97.48
c) 99.45
d) 97.44
13. Systematic errors are those errors:
a) whose effects are cumulative and can be determined
b) on circumference of circumscribing circle
c) outside the great triangle
d) in the centre of the circumscribing circle
14. A steel cube of volume 8000 cc is subjected to all round stress of 1330 kg/cm3. The bulk modulus of the material is 1.33 x 106 kg/cm2. The volumetric change is:
a) 8 cc
b) 6 cc
c) 0.8 cc
d) 10-3 cc
15. A triangular
channel section will be most economical when each of the sloping sides make
with vertical angle of:
a) 30 degree
b) 60 degree
c) 40 degree
d) 45 degree
16. Relative humidity is the ratio of actual vapour pressure to the saturated vapour pressure:
a) at the same temperature
b) at the same pressure
c) at the same volume
d) in the atmosphere
17. The sum of specific yield and specific retention is equal to:
a) porosity
b) saturation percentage
c) permeability coefficient
d) storage coefficient
18. A divide wall is constructed for the purpose of:
a) Controlling seepage
b) scouring the silt
c) Creating a still pond
d) Providing a fish passage
19. An aqueduct is constructed when the high flood level is:
a) below the canal level
b) same level as the canal
c) above the canal level
d) above the road level
20. For a given road, safe stopping sight distance is 80 m and passing distance is 300 m. What is the intermediate sight distance?
a) 220 m
b) 190 m
c) 160 m
d) 150 m
21. Base course is used in Rigid pavements for:
a) Prevention of sub grade settlement
b) Prevention of slab cracking
c) Prevention of pumping
d) Prevention thermal expansion
22. A doubly reinforced beam is considered less economical than a singly reinforced beam because:
a) Tensile steel required is more than that for a balanced section
b) Shear reinforced is more
c) Concrete is not stressed to its full value
d) Compressive steel is under-stressed
23. The load carrying capacity of a column designed by working stress method is 500 kN. The collapse load of the column is:
a) 500.0 kN
b) 662.5 kN
c) 750.0 kN
d) 1100.0 kN
24. High alumina cement is produced by fusing together a mixture of:
a) limestone and bauxite
b) limestone, bauxite and gypsum
c) limestone, gypsum and clay
d) limestone, gypsum, bauxite, clay and chalk
25. When provided with alternating courses of (a) all headers and (b) all stretches, the front elevation of such brick masonry is designated as:
a) English bond
b) Single Flemish bond
c) Double Flemish bond
d) Rat-trap bond
26. The magnetic bearing of a line AB is S 50o E and the declination is 5o West. The true bearing of the line AB is:
a) S 50o E
b) S 58o W
c) S 55o E
d) S 60o E
27. Curvature correction to a staff reading in a differential leveling survey is:
a) always subtractive
b) always zero
c) always additive
d) dependent on latitude
28. Hydrology deals with:
a) Rain water
b) river water
c) sea water
d) surface and underground water
29. A hydrograph of short duration can be converted into a hydrograph of longer duration by:
a) Unit hydrograph
b) Synthetic hydrograph
c) S-curve method
d) Flood routing
30. The following is not a component part of a diversion headwork:
a) Spillway
b) Weir
c) Fish Ladder
d) Canal Head Regulator
31. The stopping sight distance depends upon:
a) total reaction time of driver
b) speed of vehicle
c) efficiency of brakes
d) all of the above
32. Width of carriage way for a single lane is recommended to:
a) 7.5
b) 7.0
c) 3.75
d) 5.5
33. In a compaction test, as the compaction effort is increased, the optimum moisture content:
a) decreases
b) remains same
c) increases
d) increases first and then decreases
34. The most important water quality parameter for domestic use of water is:
a) carbonate hardness
b) non-carbonate hardness
c) coliform group of organisms
d) chlorides
35. Rails are generally discarded if:
a) web or head gets split
b) gauge side is worn by 3.0 mm
c) wear of rail exceeds 5%
d) any of the above takes place
36. The marshaling yard in the railway system provides facilities:
a) for safe movement of passengers and coaches
b) for receiving, unloading and delivery of goods and movement of good vehicle
c) to receive, break up, reform and dispatch trains onwards
d) for maintenance of rolling stock
37. Surkhi is added to lime mortar to:
a) prevent shrinkage
b) decrease setting time
c) combined lime
d) impart hydraulicity
38. A rectangular beam of width 100 mm is subjected to a maximum shear force of 60 kN. The corresponding maximum shear stress in the cross-section is 4 N/mm2. The depth of the beam should be:
a) 200 mm
b) 150 mm
c) 100 mm
d) 225 mm
39. The viscosity of gases:
a) Decreases with temperature
b) increases with temperature
c) Is independent of temperature
d) None of the above
40. For a completely submerged body with centre of gravity G and centre of buoyancy B, the condition of stability will be:
a) G is located below B
b) G is located above B
c) G and B are coincident
d) Independent of the locations of G and B
41. Reynold’s number relates to:
a) inertia and viscous force
b) viscous and gravity forces
c) elasticity and viscosity
d) velocity and viscosity
42. A centrifugal pump converts:
a) Electrical energy to mechanical energy
b) Kinetic energy to pressure energy
c) Pressure energy to kinetic energy
d) Electrical generator converts mechanical energy into electrical energy
43. A soil having particles of nearly the same size is known as:
a) well graded
b) uniformly graded
c) poorly graded
d) gap graded
44. Chlorine is sometimes used in sewage treatment:
a) to avoid flocculation
b) to increase biological activity of bacteria
c) to avoid bulking if activated sludge
d) to help in grease separation
45. For taking the consideration of creep of rails the sleepers that need no anchoring arrangement:
a) wooden sleeper
b) steel sleeper
c) cast iron sleeper
d) concrete sleeper
46. The type of tunneling that is not done in case of tunneling in soft soil:
a) Needle Beam Method
b) Full face Method
c) Fore poling Method
d) Linear plate Method
47. The brick work is measured in square metre, in case of:
a) Honey comb brick work
b) Brick flat soiling
c) Half brick walls or the partition
d) All the above
48. The tangent distance for a circular curve of length 150 meters joining two straights meeting at an external deflection angle of 30o is:
a) 40.19 m
b) 45.20 m
c) 46.20 m
d) 41.20 m
49. Camber in the road is provided for:
a) effective drainage
b) counteracting the centrifugal force
c) having proper sight distance
d) none of the above
50. The co-efficient of friction in the longitudinal direction of a highway is estimated as 0.396. The breaking distance for a new car moving at a speed of 65 km/hr is:
a) 87 m
b) 45 m
c) 42 m
d) 40 m
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