McqMate
| 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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