civil engineering MCQs – Page 177

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
3521. Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall. Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle around only one axis.
comments icon0

A. ect your answer according to the codes given below.

B. Both A and R are true and R is the correct explanation of A.

C. Both A and R are true but R is not the correct explanation of A.

D. A is true but R is false.

E. A is false but R is true.

3522. In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as________________?
comments icon0

A. sum of thickness of both leaves

B. two-third of the sum of thickness of both the leaves

C. actual thickness of the stronger leaf

D. larger of (B) and (C)
3523. The thickness of each leaf of a cavity wall shall not be less than_________________?
comments icon0

A. 5 cm

B. 15 cm

C. 7.5 cm

D. 10 cm

3524. For earthquake resistant masonry buildings, the vertical distance between openings one above the other in a load bearing wall shall not be less than_________________?
comments icon0
A. 60 cm

B. 50 cm

C. 75 cm

D. 100 cm

3525. The mode of failure of a very short masonry member having h/t ratio of less than 4 is by _______________?
comments icon0

A. any of the above

B. buckling

C. shear

D. vertical tensile splitting

3526. If the ratio of center to center spacing of intersecting walls to actual thickness of intersecting wall is more than 20, then the stiffening coefficient for wall proper will be_________________?
comments icon0
A. greater than 1

B. between 0 and 1

C. 1

D. 0

3527. A 200 mm thick brick masonry wall made of modular bricks carries an axial load of 30 kN/m from wall above and an eccentric load of 20 kN/m from RCC floor acting at a distance of 47.5 mm from the centre line of the wall. The resultant eccentricity ratio is A. B. C. D. ?
comments icon0

A. 95

B. 90

C. 100

D. 5

3528. A 200 mm thick wall made of modular bricks is 5 m long between cross walls and 3.8 m clear height between RCC slabs at top and bottom. The slenderness ratio of the wall is________________?
comments icon0

A. 20

B. 15

C. 19

D. 25

3529. The timber floor not spanning on the masonry wall but properly anchored to the wall gives________________?
comments icon0
A. lateral restraint but not rotational restraint

B. rotational restraint but not lateral restraint

C. both lateral and rotational restraints

D. neither lateral nor rotational restraint

3530. The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of_________________?
comments icon0

A. 2

B. 1.4

C. 1.6

D. 1.2

3531. If H is the height of wall between centers of supports, then the effective height of wall where concrete floors have a bearing on wall irrespective of the direction of span will be________________?
comments icon0

A. 1.0 H

B. 0.85 H

C. 1.5 H

D. 0.75 H
3532. The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is_________________?
comments icon0
A. less than or equal to 1/24

B. more than 1/24

C. less than or equal to 1/6

D. less than or equal to 1/12

3533. Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have________________?
comments icon0
A. high shrinkage

B. less strength

C. both (A) and (B)

D. none of above

3534. If the horizontal cross-sectional area of a wall is 1200 cm2, then the basic stress shall be multiplied by a reduction factor equal to________________?
comments icon0
A. 0.85

B. 0 6

C. 0.75

D. 0.95

3535. Which of the following represents a metamorphic rock? (1) slate (2) shale (3) quartzite . The correct answer is___________?
comments icon0

A. only (3)

B. both (1) and (3)

C. both (2) and (3)

D. all (1), (2) and (3)

3536. The constituent of cement which is responsible for all the undesirable properties of cement is____________?
comments icon0
A. tricalcium aluminate

B. tetra calcium alumino ferrite

C. tricalcium silicate

D. dicalcium silicate

3537. The most common admixture which is used to accelerate the initial set of concrete is______________?
comments icon0
A. calcium chloride

B. gypsum

C. none of the above

D. calcium carbonate

3538. The lintels are preferred to arches because______________?
comments icon0

A. arches are difficult in construction

B. arches require more headroom to span the openings like doors, windows etc.

C. all of the above

D. arches require strong abutments to withstand arch thrust

3539. The main constituent of cement which is responsible for initial setting of cement is_________________?
comments icon0

A. all of the above

B. tricalcium silicate

C. tricalcium aluminate

D. dicalcium silicate

3540. Specific gravity for most of the building stones lies between_____________?
comments icon0

A. 2.0 to 2.5

B. 1.5 to 2.0

C. 2.5 to 3.0

D. 3.0 to 3.5