civil engineering Mcqs
501. The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is______________?
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A. 25

B. 30

C. 20

D. 35

502. Select the incorrect statement?
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A. Effective angle of internal friction for a soil increases as state of compact-ness increases

B. Effective cohesion of a soil can never have a negative value

C. Effective angle of internal friction is a complicated function of mineralogy and clay size content

D. Effective angle of internal friction for coarse grained soils is rarely below 30

503. According to IS : 456-1978, the fiexural strength of concrete is________________?
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A. directly proportional to compressive strength

B. inversely proportional to square root of compressive strength

C. directly proportional to square root of compressive strength

D. inversely proportional to compressive strength

504. The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept______________?
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A. 0.6

B. 0.8

C. 0.7

D. 0.9
505. 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 :

506. The angle that Coulombs failure envelope makes with the horizontal is called________________?
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A. angle of repose

B. cohesion

C. angle of internal friction

D. none of the above

507. Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam_______________?
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A. Are maintained at bottom to provide at least local bond stress

B. Are bent up at suitable places to serve as shear reinforcement

C. Are bent down at suitable places to serve as shear reinforcement

D. Are curtailed if not required to resist the bending moment

508. Sand particles are made of________________?
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A. illite

B. rock minerals

C. montmorillonite

D. kaolinite

509. The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone_________________?
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A. tensile stress

B. shear stress

C. bond stress

D. compressive stress

510. the column head support a flat slab, is generally kept The diameter of_____________?
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A. 0.25 times the diameter of the column

B. 5.0 cm larger than the diameter of the column

C. 0.25 times the span length

D. 4.0 cm larger than the diameter of the column

511. An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is__________________?
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A. Safe in shear

B. Needs revision of the section

C. Is safe with stirrups

D. Is safe with stirrups and inclined members

512. Effective stress is______________?
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A. the stress at particles contact

B. all of the above

C. important because it is a function of engineering properties of soil

D. a physical parameter that can be measured

513. With the increase in the amount of compaction energy________________?
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A. optimum water content increases but maximum dry density decreases

B. optimum water content decreases but maximum dry density increases

C. both optimum water content and maximum dry density increase

D. both optimum water content and maximum dry density decrease

514. Select the correct range of density index,ID ________________?
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A. lD>0

B. 0 < lD < 1

C. ID>0

D. 0 < ID < 1
515. Which of the following R.C. retaining walls is suitable for heights beyond 6m ?
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A. L-shaped wall

B. counterfort type

C. all of the above

D. T-shaped wall

516. Coefficient of permeability of soil______________?
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A. none of the above

B. does not depend upon temperature

C. increases with the increase in temperature

D. increases with the decrease in temperature

517. Which of the following statements is correct ?
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A. Uniformity coefficient represents the shape of the particle size distribution curve

B. For a well graded soil, both uniformity coefficient and coefficient of curvature are nearly unity

C. A soil is said to be well graded if it has most of the particles of about the same size

D. none of the above
518. The hydrometer method of sedimentation analysis differs from the pipette analysis mainly in_____________?
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A. the method of preparation of soil suspension

B. the principle of test

C. the method of taking observations

D. all of the above

519. Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of_______________?
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A. Half the distance of projection

B. One -fourth the distance of projection

C. 0.1 L from the outer edge of column

D. 0.1 L from the centre edge of column
520. 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

521. Steel bars are generally connected together to get greater length than the standard length by providing_______________?
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A. Dowel splice

B. Hooked splice

C. Straight bar splice

D. All the above
522. Unconfmed compressive strength test is________________?
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A. undrained test

B. drained test

C. consolidated drained test

D. consolidated undrained test

523. In a spherical dome the hoop stress due to a concentrated load at crown is_______________?
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A. zero

B. partly compressive and partly tensile

C. tensile everywhere

D. compressive everywhere

524. The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is______________?
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A. provided more on inner face than on front face

B. not needed

C. provided more on front face than on inner face

D. provided equally on inner and front faces

525. 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. 53 MPa and 42 MPa

D. 42 MPa and 35 MPa
526. The value of compression index for a remoulded sample whose liquid limit is 50% is______________?
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A. 0.028

B. 36

C. 0.28

D. 0.036

527. 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)

528. The shear strength of a soil_________________?
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A. decreases with decrease in normal stress

B. decreases with increase in normal stress

C. is inversely proportional to the angle of internal friction of the soil

D. is directly proportional to the angle of internal friction of the soil

529. If the material of the base of the Casagrande liquid limit device on which the cup containing soil paste drops is softer than the standard hard rubber, then______________?
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A. the liquid limit of soil may increase

B. the liquid limit of soil always decreases

C. the liquid limit of soil may decrease

D. the liquid limit of soil always increases
530. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass ?
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A. alcohol method

B. oven drying method

C. calcium carbide method

D. sand bath method

531. In counterfort type retaining walls_____________?
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A. correct answer is?

B. e="color: #003f1a;">4. the heel slab is designed as a cantilever
C. e="color: #003f1a;">3. the vertical slab is designed as a cantilever
D. e="color: #003f1a;">2. the heel slab is designed as a continuous slab
E. ="color: #003f1a;">1. the vertical slab is designed as a continuous slab
532. Time factor for a clay layer is_______________?
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A. directly proportional to permeability of soil

B. inversely proportional to drainage path

C. a dimensional parameter

D. independent of thickness of clay layer

533. The spacing of transverse reinforcement of column is decided by the following consideration_______________?
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A. All the above

B. The least lateral dimension of the column

C. Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column

D. Forty-eight times the diameter of transverse reinforcement

534. A 300 mm square bearing plate settles by 15 mm in a plate load test on a cohesive soil when the intensity of loading is 0.2 N/mm2. The settlement of a prototype shallow footing 1 m square under the same intensity of loading is___________________?
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A. 167 mm

B. 30 mm

C. 50 mm

D. 15 mm

535. If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are__________________?
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A. 1.5 m and 1.5 m

B. 1.5 m and 3.0 m

C. 3.0 m and 1.5 m

D. 3.0 m and 3.0 m
536. The critical section for finding maximum bending moment for footing under masonry wall is located_______________?
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A. at the edge of the wall

B. at the middle of the wall

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

D. halfway between the middle and edge of the wall
537. Highway Research Board (HRB) classification of soils is based on__________________?
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A. particle size composition

B. plasticity characteristics

C. both particle size composition and plasticity characteristics

D. none of the above

538. The limits of percentage p of the longitudinal reinforce-ment in a column is given by_____________?
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A. 0.15% to 2%

B. 0.8% to 8%

C. 0.8% to 4%

D. 0.8% to 6%
539. If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________?
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A. 100%

B. 80%

C. 60%

D. 40%
540. The design yield stress of steel according to IS: 456-1978 is_______________?
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A. 0.57 fy

B. 0.67 fy

C. 0.87 fy

D. 0.37 fy

541. In the plate loading test for determining the bearing capacity of soil, the size of square bearing plate should be_________________?
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A. greater than 1 m

B. less than 300 mm

C. between 750 mm and 1 m

D. between 300 mm and 750 mm
542. Lap length in compression shall not be less than______________?
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A. 24 (j)

B. 15 4>

C. 30 (j)

D. 20

543. In counterfort retaining walls, the main reinforcement in the stem at support is_______________?
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A. not provided

B. provided only on inner face

C. provided only on front face

D. provided both on inner and front faces

544. According to IS classification, the range of silt size particles is_________________?
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A. 0.425 mm to 0.075 mm

B. 4.75 mm to 2.00 mm

C. 0.075 mm to 0.002 mm

D. 2.00 mm to 0.425 mm

545. Modulus of elasticity of steel as per IS : 456-1978 shall be taken as______________?
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A. 2xl06N/cm2

B. 200 kN/cm2

C. 200kN/mm2

D. 20 kN/cm2

546. The design of heel slab of a retaining wall is based on the maximum bending moment due to______________?
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A. Weight of the soil above it

B. Its own weight

C. All the above

D. Load of the surcharge, if any

547. Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension_______________?
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A. Three times

B. Two times

C. Five times

D. Four times
548. If the plasticity index of a soil mass is zero, the soil is______________?
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A. sand

B. clayey silt

C. silt

D. clay

549. Shear strength of a soil is a unique function of__________________?
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A. effective stress only

B. total stress only

C. both effective stress and total stress

D. none of the above

550. During the first stage of triaxial test when the cell pressure is increased from 0.10 N/mm2 to 0.26 N/mm2, the pore water pressure increases from 0.07 N/mm2 to 0.15 N/mm2. Skemptons pore pressure parameter B is___________________?
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A. 0.5

B. 2.0

C. -0.5

D. 2