The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.

Related Mcqs:

1. 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.

2. 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

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

4. 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)

5. Minimum compressive strength in N/mm2 for H1 type mortar used for masonry is_______________?

   A. 3
   B. 5
   C. 7.5
   D. 10

6. Which of the following will give higher ratio of brickwork strength to mortar strength ?

   A. 1 : % : 3
   B. 1 : Vz: 4>/2
   C. 1:1:6
   D. 1:2:9

7. 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

8. 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%

9. 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

10. Assertion A : For eccentricity ratio exceeding 1/6, effective thickness of masonry will get reduced. Reason R : For eccentricity ratio exceeding 1/6, there will be tension on one side of the member?

    Select your answer according to the codes give below.

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