### Civil Engineering - GATE Exam Questions MCQs Part 5

1. The value of bearing capacity factor for cohesion, Nc, for piles as per Meyerhof, is taken as :

A.

6.2

6.2

B.

12.0

12.0

C.

9.0

9.0

D.

5.14

5.14

**Answer Option D**

2. Permissible bending tensile stress in high yield strength deformed bars of grade 415 N/mm2 in a beam is :

A.

190 N/mm2

190 N/mm2

B.

230 N/mm2

230 N/mm2

C.

140 N/mm2

140 N/mm2

D.

None of the above

None of the above

**Answer Option B**

3. The equation along a stream line holds true for :

A.

steady, frictionless, compressible fluid

steady, frictionless, compressible fluid

B.

steady, uniform, incompressible fluid

steady, uniform, incompressible fluid

C.

steady, frictionless, incompressible fluid

steady, frictionless, incompressible fluid

D.

unsteady incompressible fluid

unsteady incompressible fluid

**Answer Option B**

4. An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is

A.

2.52

2.52

B.

2.31

2.31

C.

2.01

2.01

D.

1.52

1.52

**Answer Option B**

5. A stable channel is to be designed for a discharge of Q m3 /s with silt factor f as per Lacey's method. The mean flow velocity (m/s) in the channel is obtained by

A.

(Qf2/140)1/6

(Qf2/140)1/6

B.

(Qf/140)1/3

(Qf/140)1/3

C.

(Q2f2/140)1/6

(Q2f2/140)1/6

D.

0.48 (Q/f)1/3

0.48 (Q/f)1/3

**Answer Option A**

6. The problem of lateral buckling can arise only in those steel beams which have

A. Moment of inertia about the bending axis larger than the other

B. Moment of inertia about the bending axis smaller than the other

C. Fully supported compression flange

D. None of the above.

**Answer Option B**

7. The maximum tensile stress at the section X-X shown in the figure below is

A.

B.

C.

D.

**Answer Option A**

8. Mud pumping is commonly associated with

A. bituminous penetration mecadam construction

B. cement concrete pavement on granular subgrade

C. premixed bituminous construction

D. cement concrete pavement on clay sub-grade

**Answer Option A**

9. 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

**Answer Option B**

10. Rapid curing cut back bitumen is produced by blending bitumen with

A. Kerosene

B. Benzene

C. Diesel

D. Petrol

**Answer Option D**

11. A pre-tensioned concrete member of section 200 mm x 250 mm contains tendons of area 500 mm2 at centre of gravity of the section. The prestress in the tendons is 1000 N/mm2. Assuming modular ratio as 10, the stress (N/mm2) in concrete is

A. 11

B. 9

C. 7

D. 5

**Answer Option B**

12. A river 5 m deep consists of a sand bed with saturated unit weight of 20 kN/m3 . vw = 9.81 kN/m3. The effective vertical stress at 5 m from the top of sand bed is

A. 41 kN/m2

B. 51 kN/m2

C. 55 kN/m2

D. 53 kN/m2

**Answer Option B**

13. Biochemical oxygen demand (BOD) of waste water is a measure of

A. total concentration of a biochemicals

B. total concentration of organic matter

C. concentration of biodegradable organic matter

D. concentration of chemically oxidisable matter

**Answer Option C**

14. The effective width of a reinforced concrete T beam flange under compression, according to IS : 456-1978, given I0 is the distance between the adjacent zero moment points, b is the breadth of the rib and D is the thickness of the flange, is

A.

B. I0 + 6D

C.

D.

**Answer Option A**

15. In using the data from a plate bearing test for determining the modulus of subgrade reaction, the value of settlement to be used is :

A. 1.25 mm

B. 2.50 mm

C. 3.75 mm

D. 1.75 mm

**Answer Option A**

16. The net effective cross sectional area calculated in the steel angle tension member design, accounts for:

A. the tensile force and bolt holes

B. the eccentricity of the end connections and the bolt holes

C. the effectiveness of the tack connection along the length

D. the effectiveness of the end connection

**Answer Option A**

17. A light house of 120 m height is just visible above the horizon from a ship. The correct distance (m) between the ship and the light house considering combined correction for curvature and refraction, is

A. 39.098

B. 42.226

C. 39098

D. 42226

**Answer Option D**

18. Water distribution systems are sized to meet the

A. maximum hourly demand

B. average hourly demand

C. maximum daily demand and fire demand

D. average daily demand and fire demand.

**Answer Option C**

19. Determine the correctness of otherwise of the following Assertion [A] and the Reason [R]. Assertion [A] : The crown of the outgoing larger diameter sewer is always matched with the crown of incoming smaller diameter sewer. Reason [R] : It eliminates backing up of sewage in the incoming smaller diameter sewer.

A. Both [A] and [R] are true and [R] is the correct reason for [A]

B. Both [A] and [R] are true and [R] is not the correct reason for [A]

C. Both [A] and [R] are false

D. [A] is true but [R] is false

**Answer Option A**

20. For the structure shown below, the vertical deflection at point A is given by

A.

B.

C. Zero

D.

**Answer Option B**

21. In highway pavements emulsions are mainly used in :

A. surface dressing

B. patching and maintenance operation

C. bitumen macadam

D. asphaltic concrete

**Answer Option B**

22. While deriving an expression for loss of head due to a sudden expansion in a pipe, in addition to the continuity and impulse-momentum equations, one of the following assumptions is made :

A. Head loss due to friction is equal to the head loss in eddying motion

B. The mean pressure in eddying fluid is equal to the downstream pressure

C. The mean pressure in eddying fluid is equal to the upstream pressure

D. Head lost in eddies is neglected

**Answer Option C**

23. A three hinged arch shown in the below figur is quarter of a circle, If the vertical and horizontal components of reaction at A are equal, the value of Î¸ is

A. 60°

B. 45°

C. 30°

D. None in (0°, 90°)

**Answer Option B**

24. The appropriate field test to determine the insitu undrained shear strength of soft clay is :

A. plate load test

B. static cone penetration test

C. standard penetration test

D. vane shear test

**Answer Option D**

25. Generally the maximum deflection/span ratio of a steel member should not exceed

A.

B.

C.

D.

**Answer Option C**

26. A continuous beam is loaded as shown in the figure below. Assuming a plastic moment capacity equal to MP, the minimum load at which the beam would collapse is

A.

B.

C.

D.

**Answer Option B**

27. Delta (Î”) in cm. Duty (D) in hectare Cumec and Base period (B) in days are related as

A. Î” = 864 B/D

B. B = 864 D/Î”

C. B = 864 Î”/D

D. D = 8.64 B/Î”

**Answer Option D**

28. The penetration test for bitumen is conduced at a temperature of

A. 60°C

B. 37°C

C. 25°C

D. 50°C

**Answer Option C**

29. If a single pipe of length L and diameter D is to be replaced by three pipes of same material, same length and equal diameter d (d < D), to convey the same total discharge under the same head loss, then d and D are related by

A.

B.

C.

D.

**Answer Option A**

30. According to Darcy's law for flow through porous media, the velocity is proportional to

A. Effective stress

B. hydraulic gradient

C. cohesion

D. stability number

**Answer Option B**

31. Storage coefficient of a compressible confined aquifer is a function of

A. specific weight of water, thickness of the aquifer, compressibility of the aquifer and that of water

B. permeability, thickness and compressibility of aquifer and compressibility of water

C. transmissibility of the aquifer and compressibility of water

D. transmissibility of aquifer and specific yield of aquifer

**Answer Option D**

32. Factor of safety adopted by IS : 800 - 1984 while arriving at the permissible stress in axial compression, is :

A. 2.00

B. 1.00

C. 1.67

D. 1.50

**Answer Option C**

33. Well foundations are commonly used as foundations for the following structures :

A. Water tanks

B. Bridges

C. Buildings

D. Reciprocating machines

**Answer Option B**

34. The consistency of a saturated cohesive soil is affected by

A. water content

B. particle size distribution

C. density index

D. coefficient of permeability

**Answer Option A**

35. The following two statements are made with reference to the planar truss shown below The truss is statically determinateThe truss is kinematically determinate With refernece to the above statements, which of the following applies ?

A. Both statements are ture.

B. Both statements are false.

C. II is true but I false.

D. I is true but II is false.

**Answer Option C**

36. The total thickness of pavement by CBR method depends on the CBR value of

A. base course

B. surface course

C. subgrade

D. all layers

**Answer Option D**

37. The standard plate size in a plate bearing test for finding modulus of subgrade reaction (k) value is

A. 100 cm diameter.

B. 50 cm diameter.

C. 75 cm diameter.

D. 25 cm diameter.

**Answer Option C**

38. The strain energy stored in member AB of the pin-jointed truss shown in the below figure, when E and A are same for all members, is

A. 2P2L/AE

B. P2L/AE

C. P2L/2AE

D. Zero

**Answer Option C**

39. In a river, discharge is 173 m3/s; water surface slope is 1 in 6000; and stage at the gauge station is 10.0 m. If during a flood, the stage at the gauge station is same and the water surface slope is 1 in 2000, the flood discharge in m3/s, is approximately

A. 371

B. 100

C. 519

D. 300

**Answer Option D**

40. In an area of 200 hectare, water table drops by 4 m. If the porosity is 0.35 and the specific retention is 0.15, change in volume of storage in the aquifer is

A. 160 m3

B. 1.6 x 106 m

C. 8 x 106 m3

D. 1.6 x 103 m3

**Answer Option B**

41. The water surface profile resulting from flow underneath the gate in the below figure is :

A. H3

B. M1

C. H2

D. S2

**Answer Option B**

42. A cantilever beam of span 'L' is loaded with a concentrated load 'P' at the free end. Deflection of the beam at the free end is

A.

B.

C.

D.

**Answer Option C**

43. The Piezometric head at point C, in the experimental set-up shown in the below figure when the flow takes place under a constant head through the soils A and B is

A. 0 cm

B. 40 cm

C. 80 cm

D. 120 cm

**Answer Option D**

44. If an ascending gradient of 1 in 50 meets another ascending gradient of 1 in 30 then the deviation angle is :

A.

B.

C.

D.

**Answer Option B**

45. Bending moments at joint b and c of the portal frame are respectively :

A. + p l/2, - p l/2

B. + p l/2, + p l/2

C. + p l/4, - p l/4

D. + p l/4, + p l/4

**Answer Option B**

46. Generally (fatigue life of welded steel structure/fatigue life of riveted steel structure) ratio is,

A. smaller than 1

B. equal to 1

C. greater than 1

D. greater than 2.1

**Answer Option A**

47. Cohesion in soil

A. decreases active pressure and increases passive resistance

B. decreases both active pressure and passive resistance

C. increases the active pressure and decreases the passive resistance

D. increases both active pressure and passive resistance.

**Answer Option D**

48. The unit weight of a soil at zero air voids depends on :

A. specific gravity

B. water content

C. unit weight of water

D. all the above

**Answer Option D**

49. The BOD removal efficiency, in percentage, during primary treatmet under normal conditions is about

A. 65%

B. 85%

C. 30%

D. Zero

**Answer Option A**

50. The settlement of prototype in granular material may be estimated using plate load test data from the following expression :

A.

B.

C.

D.

**Answer Option A**

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