CIVIL ENGINEERING- PAGE 30

Civil Engineering MCQ- Page 30

1. In open channel, the specific energy is
(A) The total energy per unit discharge
(B) The total energy measured above a horizontal datum
(C) The total energy measured with respect to the channel bottom which is taken as datum
(D) The kinetic energy plotted above the free surface
Ans: C

2. The boundary layer exists in which of the following?
(A) Flow of real fluids (B) Flow of ideal fluids (C) Flow over flat surfaces only (D) Pipe flow only
Ans: A

3. The drag and lift forces experienced by an object placed in a fluid stream are due to
(A) Pressure and turbulence (B) Viscosity and turbulence (C) Pressure and viscosity (D) Pressure and gravity
Ans: C

4. 117. The scale effects in models can be
(A) Positive only (B) Negative only (C) Both positive and negative (D) None of the above
Ans: C

5. ______ are those which are capable of working under heads less than 30 m.
(A) Low head turbine (B) Medium head turbine (C) High head turbine (D) None of above
Ans: A

6. The method used for estimating missing rainfall is
(A) Normal ratio method (B) Station year method (C) Plotting position method (D) Rational method
Ans: A

7. The discharge per unit drawdown at a well is known as
(A) Specific yield (B) Specific discharge (C) Specific capacity (D) Specific transmissibility
Ans: C

8. ______ is defined as the amount of irrigation water that is required to meet the evapo-transpiration needs of the crop during its full growth.
(A) Gross Irrigation Requirement (B) Net Irrigation Requirement
(C) Consumptive Irrigation Requirement (D) Field Irrigation Requirement
Ans: C

9. In Gravity dam, the ______ acts in a direction opposite to the acceleration imparted by earthquake forces and is equal to the product of the mass and the acceleration
(A) Inertia force (B) Hydrodynamic force
(C) Uplift force (D) Wave pressure
Ans: A

10. A ______ is an irrigation structure constructed across a canal to lower down its water level and destroy the surplus energy liberated from the falling water which may otherwise scour the bed and banks of the canal
(A) Canal falls (B) Head regulator (C) Canal escape (D) Canal outlets
Ans: A

11. Ultimate strength to cement is provided by
(A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Ans: B

12. A RCC slab under mild exposure condition having main longitudinal tensile reinforcement of diameter 12 mm, then minimum allowable nominal cover to satisfy durability requirement is
(A) 10mm (B) 15mm (C) 20mm (D) 25mm
Ans: B

13. For an I-beam shape factor is 1.12, The factor of safety in bending is 1.5. If the allowable stress is increased by 20% for wind and earthquake loads, then the load factor is
(A) 1.1 (B) 1.25 (C) 1.35 (D) 1.4
Ans: D

14. A flow net is a graphical representation of stream lines and equipotential lines such that these lines
(A) Intersect each other orthogonally curvilinear squares
(B) Intersect each other at various different angles forming irregular-shaped nets
(C) Indicate the direction and magnitude of vector
(D) None of above
Ans: A

15. Efflorescence is due to the presence of
(A) excessive soluble salts in the mortar (B) rust in the reinforcing steel (C) cracks in the masonry (D) stagnating water
Ans: A

16. A forebay is an enlarged body of water provided just in
(A) Power house (B) Draft tube (C) Penstocks (D) Turbines
Ans: C

17. Aluminum is obtained from the ore called as
(A) Bauxite (B) Ferrite (C) Magnetite (D) Calcite
Ans: A

18. Deflection in a truss depends upon
(A) axial rigidity (B) flexural rigidity (C) torsional rigidity (D) axial and flexural rigidity
Ans: A

19. An orifice is called a large orifice if water head, is
(A) twice the diameter of the orifice (B) thrice the diameter of the orifice
(C) four times the diameter of the orifice (D) five times the diameter of the orifice
Ans: D

20. A stagnation point is a point
(A) Where the pressure is zero   (B) Where the total energy is zero
(C) Where the velocity of flow reduces to zero   (D) Where the total energy is maximum
Ans: C

21. According to the direction of flow through runner, Pelton turbine is
(A) Tangential flow impulse turbine (B) Radial flow impulse turbine
(C) Axial flow impulse turbine (D) Mixed flow impulse turbine
Ans: A

22. For cereal crops the most commonly adopted method of irrigation, is
(A) free flooding (B) check method (C) furrow method (D) sprinkler method
Ans: B

23. For standing crops in undulating sandy fields, the best method of irrigation, is
(A) sprinkler method (B) free flooding (C) check method (D) furrow method
Ans: A

24. In a canal syphon, flow is
(A) under atmospheric pressure (B) pipe flow only (C) with critical velocity (D) under negative pressure
Ans: B

25. The friction drag is primarily due to
(A) Pressure distribution over the body surface
(B) Separation of boundary layer
(C) Shear stresses generated due to viscous action
(D) Weight component in the direction of the flow
Ans: C

26. Infiltration capacity
(A) is constant factor (B) changes with time (C) changes with location (D) changes with time and location
Ans: D

27. According to khosla theory, the exit gradient in the absence of down stream cut-off is
(A) zero (B) unity (C) infinity (D) very large
Ans: C

28. The length of the hydraulic jump is found to be
(A) 10 to 15 times depth of jump (B) 1 to 2 times depth of jump
(C) 5 to 7 times depth of jump (D) Has no relation to the depth of jump
Ans: C

29. Kaplan turbine is
(A) an impulse turbine (B) a radial flow impulse turbine
(C) an axial flow reaction turbine (D) a radial flow reaction turbine
Ans: C

30. How many additional rain gauges are required in a catchment, if the error allowed in estimation of mean rainfall is to be reduced by half than the present one?
(A) Equal to the present number (B) Twice the present number (C) Thrice the present number (D) Four times the present number
Ans: C

31. The rate of rainfall above which the rainfall volume equals the runoff volume is called
(A) W index (B) φ Index (C) Runoff coefficient (D) Basin recharge
Ans: B

32. To get the precise location of a point using GPS , the signals are required from minimum how many satellite
(A) 3 (B) 4 (C) 5 (D) 2
Ans: B

33. Standard penetration resistance in very stiff clays lies between
(A) 2 and 4 (B) 4 and 8 (C) 8 and 15 (D) 15 and 30
Ans: D

34. A longest extradosed bridge in India is
(A) Naramada Bridge (B) Barapulla Bridge (C) Indraprastha Bridge (D) Vivekanand Bridge
Ans: A

35. When the water content in a soil at which just shear strength develops is called
(A) liquid Limit (B) plastic Limit (C) elastic Limit (D) shrinkage Limit
Ans: A

36. Volume of 1 bag of cement is
(A) 0.025 cubic meter (B) 0.035 cubic meter (C) 0.045 cubic meter (D) 0.055 cubic meter
Ans: B

37. The horizontal angle between true meridian and magnetic meridian is known as
(A) bearing (B) dip (C) magnetic declination (D) None of the above
Ans: C

38. Two circular curves with opposite deflection angles is known as
(A) reverse curve (B) compound curve (C) transition curve (D) vertical curve
Ans: A

39. The line normal to the plumb line is known as
(A) horizontal line (B) vertical line (C) datum line (D) level line
Ans: A

40. The most desirable alignment of an irrigation canal is along
(A) the ridge line (B) the contour line (C) the valley line (D) None of the above
Ans: A

41. Which test measures the stability of Self-Compacting concrete (SCC)
(A) J-Ring (B) L-Box (C) V-funnel (D) Column / Probe segregation
Ans: D

42. In the soil sample of a consolidometer test, pore water pressure is
(A) minimum at the centre (B) maximum at the top (C) maximum at the bottom (D) maximum at the centre
Ans: D

43. ______ is the square root of the ratio of the inertia force to the pressure force
(A) Reynolds number (B) Mach’s number (C) Euler’s number (D) Froude’s number
Ans: C

44. The momentum correction factor ‘β’ is used in account for
(A) Change in direction of flow (B) Change in total energy
(C) Non-uniform distribution of velocities at inlet and outlet section (D) Change in mass rate of flow
Ans: C

45:-What type of levelling is done if all the readings are taken with a single set up of Dumpy Level?
A:-Continuous Levelling B:-Differential Levelling
C:-Compound Levelling D:-Simple Levelling
Ans: D

46:-Which among the following is called fine aggregate?
A:-Aggregates passing through 4.75mm IS sieve B:-Aggregates retained on 4.75mm IS sieve
C:-Aggregates passing through 0.15mm IS sieve D:-Aggregates retained on 0.15mm IS sieve
Ans: A

47:-Which of the following is called a deep foundation?
A:-Raft foundation B:-Combined footing
C:-Well foundation D:-Trapezoidal footing
Ans: C

48:-Which of the following is called as Beam section?
A:-Rolled steel angle sections B:-TOR steel
C:-Rolled steel tubes D:-Rolled steel sections
Ans: D

49:-Which instrument is used for setting right angles in a chain survey?
A:-Plumb bob B:-Cross staff C:-Peg D:-Offset rod
Ans: B

50. If the total number of commercial vehicles per day ranges from 3000 to 6000, the minimum percentage of commercial traffic to be surveyed for axle load is
(A) 15 (B) 20 (C) 25 (D) 30
Ans: A

51. The field capacity of a soil is 25%, its permanent wilting point is 15% and specific dry unity weight is 1.5, if the depth of root zone of a crop, is 80 cm, the storage capacity of the soil, is
1) 8 cm
2) 10 cm
3) 12 cm
4) 14 cm
Ans: 3

52. One of the basic assumptions made in unit hydrograph theory is
1) Rainfall is uniform all over the catchment
2) Base flow is considered
3) Rainfall varies with time
4) All the above
Ans: 1

53. A process determining outflow pattern from reservoirs for any given pattern of inflow, storage and tail-water condition is known as
1) Hydrograph
2) Flood discharge
3) Runoff estimate
4) Flood routing
Ans: 4

54. The recording type rain-guage gives
1) Mass curve of rainfall
2) Hydrograph
3) Total rainfall of 24 hours period
4) Monthly rainfall
Ans: 1

55. The solid roller bucket is arranged at the end of a spillway to
1) measure the discharge
2) provide stability to the spillway
3) trap silt from flowing water
4) dissipate energy through hydraulic jump
Ans: 4

56. To avoid gravity dam failure by crushing for the dam material of allowable stress 300 t/sq.m and specific gravity 2.4, the limiting height is equal to
1) 88.23 m
2) 125.25 m
3) 214.29 m
4) >214.29 m
Ans: 1

57. The recommended maximum water supply needs as per CPHEEO guidelines for metropolitan and mega cities where sewerage system is existing or contemplated in litres per capita per day (lpcd)
1) 45
2) 70
3) 136
4) 150
Ans: 4

58. Dental caries, a disease caused by drinking water due to
1) Excess fluorine
2) Absence of fluorine
3) Excess of nitrates
4) Presence of lead
Ans: 2

59. If the BOD of a diluted sample in 1:100 ratio is 11 ppm in the beginning and 8 PPM at the end of 5 days, then BOD of the sample is
1) 300 PPM
2) 950 PPM
3) 137.5 PPM
4) 73 PPM
Ans: 1

60. The peak factor suggested by CPHEEO for computing carrying capacity in the design of sewers for the contributory population of 20,000 is
1) 2.00
2) 2.25
3) 2.50
4) 3.00
Ans: 4

61. The tolerance limit of pH for industrial effluents discharged into inland surface waters
1) Less than 5.5
2) 5.5 to 9.0
3) Above 9.0
4) Must be 7 only
Ans: 2

62. Relationship involving voids ratio (e), degree of saturation (S), water content (w) and specific gravity of soil solids (G) is given by
1) wSe=G
2) we=SG
3) wS=Ge
4) wG=Se
Ans: 4

63. A clay soil sample has unconfined compression strengths in the undisturbed state and remoulded state are 200 kN/sq.m and 60 kN/sq.m respectively. Then its sensitivity is
1) 260
2) 140
3) 0.3
4) 3.33
Ans: 4

64. The core-cutter method for determining in-situ unit weight is suitable for
1) Soils containing gravel particles
2) Stiff clays
3) Soft cohesive soils
4) Sandy soils
Ans: 3

65. The average permeability for flow perpendicular to bedding planes when compared to the average permeability for the flow parallel to the bedding planes
1) Always less
2) Always greater
3) Always equal
4) Lesser or greater
Ans: 1

66. The earth pressure theory that is used for the design of cantilever retaining wall is
1) Meyerhof’s theory
2) Rankine’s theory
3) Terzagi’s theory
4) Skempton’s theory
Ans: 2

67.The diameter of longitudinal bars in a column should not be less than
(a) 8 mm (b) 10 mm (c) 12 mm (d) 16 mm Ans: C

68. Load carrying capacity of the foundation on sand, mainly depends upon
(a) length of the foundation (b) depth of foundation (c) breadth of foundation (d) size of foundation
Ans: D

69. The dry unit weight of a soil sample is 1.9 gm/cc and the specific gravity is 2.65, what will be the porosity of the soil ?
(a) 29.91% (b) 28.30% (c) 2.83% (d) None of these
Ans: B

70. The liquid limit and plastic limit of a soil are 35% and 15% respectively. If the flow index is 10%, then toughness index is
(a) 1.0 (b) 1.5 (c) 2.0 (d) 2.5
Ans: C

71. The liquid limit and plastic limit of a cohesive soil are determined in laboratory as 40% and 20% respectively. The plasticity index of the soil will be
(a) 10% (b) 20% (c) 30% (d) 40%
Ans: B

72. When water content in a soil is reduced beyond the shrinkage limit
(a) the total volume of soil will reduce. (b) the total volume of soil will remain constant.
(c) the total volume of soil will increase. (d) None of these
Ans: B

73. The permeability of cohesive soil is best determined by using
(a) Falling-head permeameter (b) Constant-head permeameter (c) Oedometer (d) None of these
Ans: A

74. The Darcy’s law states as
(a) V ∝ A
(b) V ∝ Q
(c) V ∝ h
(d) V ∝ i (Notations have their usual meaning)
Ans: D

75. The minimum number of longitudinal bars provided in RCC circular column is
(a) 2 (b) 4 (c) 6 (d) 8 Ans: C

76. According to IS : 456 – 2000, side face reinforcement is provided in RCC beams, when depth of beam exceeds
(a) 450 mm (b) 750 mm (c) 1000 mm (d) 1250 mm
Ans: B

77. Sheep foot roller is mostly used for the compaction of which type of soil ?
(a) Clays (b) Silt (c) Sand (d) Gravel
Ans: A

78. A pile which obtains most of its load carrying capacity at the base of pile is known as
(a) end bearing pile (b) friction pile (c) composite pile (d) None of these
Ans: A

79. A soil has bulk density 2.3 g/cc and water content 15%. The dry density of the soil sample is
(a) 1.0 g/cc (b) 1.5 g/cc (c) 2.0 g/cc (d) 2.5 g/cc
Ans: C

80. Undisturbed soil sample is obtained by
(a) Direct excavation (b) Thin walled samplers (c) Thick walled samplers (d) Augers
Ans: B

81. The largest value of stability number for soil is
(a) 0.26 (b) 0.13 (c) 2 (d) 4
Ans: A

82. Maximum size of silt size particles as per I.S. classification is
(a) 0.425 mm (b) 2 mm (c) 0.75 mm (d) 0.075 mm
Ans: D

83. Lime stabilisation technique is very effective to improve properties of
(a) Silty soil (b) Sandy soil (c) Plastic clayey soil (d) Non-plastic soil
Ans: C

84. Coefficient of consolidation of a soil is affected by
(a) Compressibility (b) Permeability (c) (a) and (b) both (d) None of these
Ans: C

85. The action of negative skin friction on the pile is to
(a) increase the ultimate load on the pile (b) reduce the allowable load on the pile
(c) maintain the working load on the pile (d) reduce the settlement
Ans: B

86. Which test is carried out to determine the safe tension for a pile ?
(a) pull-out test (b) lateral load test (c) cyclic load test (d) none of these
Ans: A

87. The shear reinforcement in a reinforced concrete beam is provided to resists
(a) bending moment (b) compression force (c) diagonal compression (d) diagonal tension
Ans: D

88. As per IS : 456 – 2000, the minimum grade of concrete to be used in reinforced cement concrete is
(a) M5 (b) M10 (c) M20 (d) M25
Ans: C

89. In pre-stressed concrete member, it is advised to use
(a) low strength concrete only. (b) high strength concrete only.
(c) low strength concrete but high strength steel. (d) high strength concrete and high strength steel.
Ans: D

90. As per IS : 456-2000, the maximum spacing of shear reinforcement along the axis of the beam for vertical stirrups should be less than (a) 0.75 d (b) 0.80 d (c) 0.70 d (d) 0.75 D
(where D is total depth of beam and d is effective depth of beam)
Ans: A

91. A pycnometer is used to determine
(a) Void ratio (b) Dry density (c) Water content (d) Density index
Ans: C

92. The maximum pressure which a soil can carry without shear failure is called
(a) Safe bearing capacity (b) Net safe bearing capacity (c) Net ultimate bearing capacity (d) Ultimate bearing capacity
Ans: A

93. Under-reamed piles are generally
(a) Driven piles (b) Bored cast-in situ piles (c) Precast piles (d) None of these
Ans: B

94. By means of compaction, the following properties of the soil increase :
(a) mass density (b) shear strength (c) stability (d) All of these
Ans: D

95. In friction piles, the load is transferred through
(a) skin friction (b) their bottom tips (c) (a) and (b) both (d) None of these
Ans: A

96. Trapezoidal combined footings are required when
(a) the space outside the exterior column is limited. (b) the exterior column is heavier. (c) Both (a) and (b) (d) None of the above
Ans: C

97. The formwork including the props can be removed from beams only after
(a) 1 day (b) 3 days (c) 4 days (d) 14 days Ans: D

98. Undisturbed soil samples are required for conducting
(a) Hydrometer test (b) Shrinkage limit test (c) Consolidation test (d) Specific gravity test
Ans: C

99. The critical gradient for all soils is normally
(a) 0.5 (b) 1.0 (c) 1.5 (d) 2.5
Ans: B

100. The maximum area of tension reinforcement in beams should not exceed
(a) 0.15% (b) 1.5% (c) 4% (d) 1%
Ans: C

Civil Engineering