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1) 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
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2) Consider the following statements regarding provision of chases in masonry_________________?
(i) No chase should be permitted in a half brick load-bearing wall, (ii) Vertical chases should not be closer than 2 m in any stretch of a wall, (iii) Chases should be provided near to bearings of beams and lintels. Select the the statements ? a. (i) and (ii) are correct b. (i) and (iii) are correct c. (ii) and (iii) are correct d. (i), (ii) and (iii) are correct
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3) Cement mortars richer than 1 : 3 are not used in masonry because_________________?
i) there is no gain in strength of masonry ii) there is high shrinkage iii) they are prone to segregation select the correct statements? a. Only (ii) is correct b. (i) and (ii) are correct c. (ii) and (iii) are correct d. (i), (ii) and (iii) are correct
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4) 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. ? a. 090 b. 095 c. 100 d. 105
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5) Consider the following statements regarding bands to be provided for strengthening masonry work in masonry buildings constructed in zone III, IV and V?
(i) Lintel band is provided at lintel level on partition walls, (ii) Gable band is provided at top of gable masonry below the purlins, (iii) The bands shall be to full width of the wall and not less than 7.5 cm in depth, (iv) The bands shall be made of reinforced concrete only. the correct statements are? a. (i) and (ii) b. (i) and (iii) c. (ii) and (iv) d. (ii) and (iii)
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6) 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
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7) Water retentivity for brick masonry should not be less than__________________? a. 50% b. 60% c. 70% d. 80%
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8) For earthquake resistant masonry buildings, where seismic coefficient is less than 0.08, the horizontal distance between two openings shall not be less than_________________? a. Vt x height of shorter opening b. Vt x height of longer opening c. Ax height of shorter opening d. Vi x height of longer opening
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9) Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar. Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars?
Select your answer according to the codes given below. a. Both A and R are true and R is the correct explanation of A. b. Both A and R are true but R is not the correct explanation of A. c. A is true but R is false. d. A is false but R is true.
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10) 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
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