McqMate

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1. |
## Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have |

A. | high shrinkage |

B. | less strength |

C. | both (a) and (b) |

D. | none of above |

Answer» A. high shrinkage |

2. |
## In a cavity wall, both leaves of which are load bearing, the effective thickness is taken as |

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) |

Answer» D. larger of (b) and (c) |

3. |
## For earthquake resistant masonry buildings, the vertical distance between openings one above the other in a load bearing wall shall not be less than |

A. | 50 cm |

B. | 60 cm |

C. | 75 cm |

D. | 100 cm |

Answer» B. 60 cm |

4. |
## The mode of failure of a very short masonry member having h/t ratio of less than 4 is by |

A. | shear |

B. | vertical tensile splitting |

C. | buckling |

D. | any of the above |

Answer» A. shear |

5. |
## The basic stress in masonry units having height to width ratio of 1.5 may be increased by a factor of |

A. | 1.2 |

B. | 1.4 |

C. | 1.6 |

D. | 2.0 |

Answer» C. 1.6 |

6. |
## The timber floor not spanning on the masonry wall but properly anchored to the wall gives |

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 |

Answer» A. lateral restraint but not rotational restraint |

7. |
## A free standing brick wall 20 cm thick is subjected to a wind pressure of 75kg/m². The maximum height of wall from stability consideration is |

A. | 0.64 m |

B. | 0.96 m |

C. | 1.28 m |

D. | 1.5 m |

Answer» A. 0.64 m |

8. |
## If 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 |

A. | 0.75 h |

B. | 0.85 h |

C. | 1.0 h |

D. | 1.5 h |

Answer» A. 0.75 h |

9. |
## For designing masonry components of a structure, seismic forces provision in the design calculation is not necessary for buildings constructed in |

A. | zone i only |

B. | zone i and ii |

C. | zone i, ii and iii |

D. | zone i, ii, iii and iv |

Answer» B. zone i and ii |

10. |
## 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 |

A. | 15 |

B. | 19 |

C. | 20 |

D. | 25 |

Answer» A. 15 |

11. |
## Water retentivity for brick masonry should not be less than |

A. | 50 % |

B. | 60 % |

C. | 70 % |

D. | 80 % |

Answer» C. 70 % |

12. |
## The bending stress in a wall or column subjected to effective vertical load need not be considered, if the eccentricity ratio is |

A. | less than or equal to 1/24 |

B. | less than or equal to 1/6 |

C. | more than 1/24 |

D. | less than or equal to 1/12 |

Answer» A. less than or equal to 1/24 |

13. |
## 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 |

A. | 0 |

B. | between 0 and 1 |

C. | 1 |

D. | greater than 1 |

Answer» D. greater than 1 |

14. |
## If the eccentricity ratio is more than 1/24, then increase in the permissible stress in the design of wall subjected to eccentric loading as per code is |

A. | 10 % |

B. | 25 % |

D. | 50 % |

Answer» B. 25 % |

15. |
## For masonry work with solid bricks, consistency of mortar should be |

A. | 5 to 8 cm |

B. | 9 to 13 cm |

C. | 14 to 18 cm |

D. | 19 to 23 cm |

Answer» B. 9 to 13 cm |

16. |
## For masonry built in 1 : 1 : 6 cement-lime-sand mix mortar or equivalent, the horizontal shear stress permissible on the area of a mortar bed joint is |

A. | 0.15 mpa |

B. | 0.125 mpa |

C. | 0.1 mpa |

D. | 0.075 mpa |

Answer» A. 0.15 mpa |

17. |
## The thickness of each leaf of a cavity wall shall not be less than |

A. | 5 cm |

B. | 7.5 cm |

C. | 10 cm |

D. | 15 cm |

Answer» B. 7.5 cm |

18. |
## Minimum compressive strength in N/mm² for H1 type mortar used for masonry is |

A. | 3 |

B. | 5 |

C. | 7.5 |

D. | 10 |

Answer» D. 10 |

19. |
## Direct load carrying capacity of a brick masonry wall standing freely as against when it supports RC slab will be |

A. | more |

B. | less |

C. | the same in both the cases |

D. | 100 % |

Answer» B. less |

20. |
## 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 |

A. | 0 6 |

B. | 0.75 |

C. | 0.85 |

D. | 0.95 |

Answer» C. 0.85 |

21. |
## For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one of the following would be most suitable? |

A. | providing buttresses at certain intervals |

B. | providing a deeper foundation |

C. | using a richer mortar |

D. | using stronger bricks |

Answer» A. providing buttresses at certain intervals |

22. |
## Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than |

A. | 10 cm |

B. | 15 cm |

C. | 20 cm |

D. | 30 cm |

Answer» A. 10 cm |

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