Rich cement mortars are more liable to cracking as compared to lean mortars because rich mortars have________________?

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. Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar. Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar_____________?

   Select your answer based on the codes given below Codes?

   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 a correct explanation of A.
   C. A is true but R is false.
   D. A is false but R is true

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. 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.

   The correct sequence of increasing order of their strengths is?

   A. LLLZ.HLHI.MLMJ
   B. L2,L,,M2>Mi,H2)H,
   C. M,,M2, H,,H2,Li,L2
   D. L2,L,,M,,M2,H,,H2

5. A high lime content in a composite cement-lime mortar results in______________?

   Consider the following statements.
   1. slow hardening.
   2. quick setting.
   3. weaker mortar.
   select the correct statements.

   A. 2 and 3 are correct
   B. 1 and 2 are correct
   C. 1 and 3 are correct
   D. 1, 2 and 3 are correct

6. 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

7. 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

8. Water retentivity for brick masonry should not be less than__________________?

   A. 50%
   B. 60%
   C. 70%
   D. 80%

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

10. Maximum slenderness ratio of load bearing walls for a dwelling having more than 2 storeys________________?

    i) shall not exceed 12 if lime mortar is used
    ii) shall not exceed 18 if cement lime mortar 1:2:9 is used
    iii) shall not exceed 24 if cement mortar 1:6 is used
    the correct statments is ?

    A. (i) and (ii) are correct
    B. (ii) and (iii) are correct
    C. (i) and (iii) are correct
    D. (i) and (ii) and (iii) are correct