civil engineering Mcqs
4801. In case of hand mixing of concrete, the extra cement to be added is__________________?
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A. 10%

B. 5%

C. 15%

D. 20%

4802. Modulus of rupture of concrete is a measure of_______________?
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A. direct tensile strength

B. flexural tensile strength

C. split tensile strength

D. compressive strength

4803. Minimum pitch of transverse reinforcement in a column is________________?
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A. forty-eight times the diameter of transverse reinforcement

B. lesser of the above three values

C. sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

D. the least lateral dimension of the member

4804. Sinking of an intermediate support of a continuous beam_____________?
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A. e="color: #003f1a;">3. reduces the positive moment at center of span

B. correct answer is?

C. e="color: #003f1a;">2. increases the negative moment at support
D. e="color: #003f1a;">4. increases the positive moment at center of span
E. ="color: #003f1a;">1. reduces the negative moment at support
4805. Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to_____________?
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A. deflect downward or upward

B. deflect upward

C. none of the above

D. deflect downward
4806. The maximum value of hoop compression in a dome is given by___________________?
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A. wR/d

B. 2wR/d

C. wR/2d

D. wR / 4d

4807. In the design of a front counterfort in a counterfort retaining wall, the main reinforcement is provided on_______________?
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A. ="color: #003f1a;">1. bottom face near counterfort
B. e="color: #003f1a;">2. top face near counterfort
C. e="color: #003f1a;">3. bottom face near centre of span
D. e="color: #003f1a;">4. top face near centre of span The correct answer is

E. only (1)

F. only (2)

4808. Normally prestressing wires are arranged in the_______________?
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A. anywhere

B. lower part of the beam

C. center

D. upper part of the beam

4809. The effect of creep on modular ratio is__________________?
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A. to keep it unchanged

B. to increase it

C. to decrease it

D. either to decrease or to increase it

4810. In prestressed concrete______________?
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A. forces of tension and compression change but lever arm remains unchanged

B. forces of tension and compressions remain unchanged but lever arm changes with the moment

C. both forces of tension and compres-sion as well as lever arm change

D. both forces of tension and compres-sion as well as lever arm remain unchanged

4811. During erection, the pile of length / is supported by a crane at a distance of________________?
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A. 0.7071

B. 0.207 /

C. 0.293 /

D. 0.793 /

4812. The main reinforcement in the toe of a T- shaped R C. retaining wall is provided on_______________?
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A. ="color: #003f1a;">1. top face parallel to the wall

B. correct answer is ?

C. e="color: #003f1a;">2. top face perpendicular to the wall
D. e="color: #003f1a;">4. bottom face perpendicular to the wall
E. e="color: #003f1a;">3. bottom face paralleUo the wall
4813. In a ring beam subjected to uniformly distributed load______________?
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A. e="color: #003f1a;">4. torsion at mid span is maximum

B. correct answer is ?

C. e="color: #003f1a;">3. torsion at mid span is zero
D. e="color: #003f1a;">2. shear force at mid span is maximum
E. ="color: #003f1a;">1. shear force at mid span is zero
4814. The recommended value of modular ratio for reinforced brick work is______________?
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A. 40

B. 30

C. 18

D. 58

4815. Select the correct statement?
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A. High tensile steel is cheaper than mild steel

B. Elastic modulus of high tensile steel is more than that of mild steel

C. Elastic modulus of high tensile steel is nearly the same as that of mild steel

D. Carbon percentage in high carbon steel is less than that in mild steel

4816. Select the correct statement?
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A. Elastic modulus of high tensile steel is nearly the same as that of mild steel

B. High tensile steel is cheaper than mild steel

C. Elastic modulus of high tensile steel is more than that of mild steel

D. Carbon percentage in high carbon steel is less than that in mild steel

4817. The design yield stress of steel according to IS: 456-1978 is_______________?
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A. 0.87 fy

B. 0.57 fy

C. 0.37 fy

D. 0.67 fy

4818. Assertion A : The load factor for live load is greater than that for dead load. Reason R : The live loads are more uncertain than dead loads?
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A. ect your answer based on the coding system given below :

4819. The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of__________________?
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A. 0.367 xu

B. 0.573 xu

C. 0.416 xu

D. 0.446 xu

4820. The load factors for live load and dead load are taken respectively as_________________?
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A. 2.2 and 1.5

B. 2.2 and 2.2

C. 1.5 and 2.2

D. 1.5 and 1.5

4821. High carbon content in the steel causes_______________?
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A. decrease in tensile strength but increase in ductility

B. increase in tensile strength but decrease in ductility

C. decrease in both tensile strength and ductility

D. increase in both tensile strength and ductility

4822. As per Whitneys theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by_______________?
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A. 0.43acybd2

B. ^acybd2

C. 0.185acybd2

D. re acy is the cylinder compressive strength of concrete

E. ^acybd2

4823. According to Whitneys theory, ultimate strain of concrete is assumed to be_____________?
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A. 3%

B. 0.3%

C. 0.03%

D. 0.10%

4824. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on______________?
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A. the front face in one direction

B. the front face in both directions

C. the inner face in one direction

D. the inner face in both directions

4825. The depth of footing for an isolated column is governed by______________?
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A. pan style="color: #003f1a;">2. shear force
B. an style="color: #003f1a;">1. maximum bending moment
C. pan style="color: #003f1a;">3. punching shear

D. correct answer is?

4826. In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?
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A. zero

B. tensile

C. compressive

D. tensile or compressive

4827. Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?
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A. elastic shortening of concrete

B. loss due to friction

C. creep of concrete

D. shrinkage of concrete

4828. A beam curved in plan is designed for_______________?
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A. bending moment and torsion

B. shear and torsion

C. bending moment and shear

D. bending moment, shear and torsion
4829. The effect of adding calcium chloride in concrete is________________?
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A. e="color: #003f1a;">2. to decrease shrinkage

B. (1) and (3)

C. (2)and (4)

D. ="color: #003f1a;">1. to increase shrinkage

E. correct answer is?

F. e="color: #003f1a;">4. to decrease setting time
4830. If the foundations of all the columns of a structure are designed on the total live and dead load basis, then_________________?
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A. the settlement of exterior columns will be more than interior columns

B. there will be no differential settlement

C. there will be no settlement of columns

D. the settlement of interior columns will be more than exterior columns

4831. Shrinkage of concrete depends upon_____________?
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A. pan style="color: #003f1a;">2. passage of time
B. an style="color: #003f1a;">1. humidity of atmosphere

C. correct answer is?

D. pan style="color: #003f1a;">3. stress
4832. Stress strain curve of high tensile steel_______________?
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A. does not show definite yield point but yield point is defined by 2% proof stress

B. does not show definite yield point but yield point is defined by 0.1% proof stress

C. has a definite yield point

D. does not show definite yield point but yield point is defined by 0.2% proof stress
4833. Which of the following has high tensile strength ?
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A. heat treated rolled wires

B. plain hot rolled wires

C. cold drawn wires

D. all have same tensile strength

4834. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is__________________?
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A. 0.55 d

B. 0.43 d

C. 0.68 d

D. 0.85 d

4835. Select the incorrect statement?
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A. For heavy loads and large spans in buildings or bridges, post-tensioning system is cheaper than pretensioning system

B. none of the above

C. Pretensioning system has greater certainty about its durability.

D. The loss of prestress is more in pre-tensioning system than in post-tensioning system.

4836. Examine the following statements ___________?
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A. pan style="color: #003f1a;">4. Factor of safety for concrete should be based on its ultimate stress.
B. pan style="color: #003f1a;">2. Factor of safety for steel should be based on its ultimate stress,
C. pan style="color: #003f1a;">3. Factor of safety for concrete should be based on its yield stress,
D. an style="color: #003f1a;">1. Factor of safety for steel should be based on its yield stress,

E. correct statements are

4837. The critical section for finding maximum bending moment for footing under masonry wall is located_______________?
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A. halfway between the middle and edge of the wall

B. at the edge of the wall

C. at the middle of the wall

D. at a distance equal to effective depth of footing from the edge of the wall

4838. According to Whitneys theory, depth of stress block for a balanced section of a concrete beam is limited to_______________?
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A. 0.85 d

B. 0.68 d

C. 0.537 d

D. 0.43 d

4839. The purpose of reinforcement in prestressed concrete is________________?
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A. all of the above

B. to impart initial compressive stress in concrete

C. to resist tensile stresses

D. to provide adequate bond stress

4840. Ultimate strength of cold drawn high steel wires_______________?
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A. increases with increase in diameter of bar

B. does not depend on diameter of bar

C. decreases with increase in diameter of bar

D. none of the above

4841. Cube strength of controlled concrete to be used for pretensioned and post-tensioned work respectively should not be less than__________________?
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A. 35 MPa and 42 MPa

B. 42 MPa and 53 MPa

C. 42 MPa and 35 MPa

D. 53 MPa and 42 MPa

4842. Most common method of prestressing used for factory production is________________?
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A. Lee-Macall system

B. Magnel-Blaton system

C. Freyssinet system

D. Long line method
4843. Prestress loss due to friction occurs________________?
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A. only in post-tensioned beams

B. only in pretensioned beams

C. in both post-tensioned and preten-sioned beams

D. none of the above

4844. In a spherical dome the hoop stress due to a concentrated load at crown is_______________?
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A. compressive everywhere

B. partly compressive and partly tensile

C. tensile everywhere

D. zero

4845. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?
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A. compressive and tensile

B. tensile and compressive

C. both compressive

D. both tensile

4846. Select the incorrect statement?
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A. Bleeding can be minimized by adding pozzuolana finer aggregate

B. Bleeding can be increased by addition of calcium chloride

C. none of the above

D. Lean mixes bleed more as compared to rich ones

4847. In counterfort type retaining walls_____________?
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A. e="color: #003f1a;">2. the heel slab is designed as a continuous slab
B. e="color: #003f1a;">4. the heel slab is designed as a cantilever

C. correct answer is?

D. e="color: #003f1a;">3. the vertical slab is designed as a cantilever
E. ="color: #003f1a;">1. the vertical slab is designed as a continuous slab
4848. In a counterfort retaining wall, the main reinforcement is provided on the_______________?
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A. e="color: #003f1a;">4. inclined face in back counterEort

B. correct answer is

C. e="color: #003f1a;">3. bottom face in back counterfort
D. e="color: #003f1a;">2. inclined face in front counterfort
E. ="color: #003f1a;">1. bottom face in front counterfort
4849. Pick up the correct statement from the following?
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A. All the above

B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated sewage in river

C. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers

D. Solubility of oxygen in sewage is 95% of that of distilled water

4850. Dry weather flow is__________________?
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A. Average daily rate of flow

B. Water supply allowance per capita

C. Average monthly rate of flow

D. Average annual rate of flow