1. 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
Ans: d
2. 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
Of these statements
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
Ans: a
3. Where a structural component or a system is
providing lateral support to five or more walls or columns, the lateral load to
be resisted may be taken as
a) 4 percent
b) 5
percent
c) 6
percent
d) 7
percent of the total vertical load on the most heavily loaded wall or column in
the group.
Ans: d
4. The effective height of free standing nonload
bearing wall and column respectively will be a) 1.OH and 1.OH
b) 1.5Handl.5H
c) 2.0Handl.5H
d) 2.0H
and 2.0H where H is the height of wall or column between centers of supports.
Ans: d
5. If H 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
Ans: a
6. 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
Ans: b
7. 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
Ans: c
8. 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
Ans:a
9. 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
Ans:a
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.
Ans:a
11. 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%
c) 33
1/3%
d) 50%
Ans:b
12. 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
Ans:b
13. 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
Ans:a
14. Assertion A : From consideration of structural
soundness and economy of design, most codes control the maximum slenderness
ratio of masonry walls and columns.
Reason R : By controlling the maximum slenderness ratio,
failure is by excessive stress and not by buckling.
Select your answer
according to 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.
Ans:a
15. 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
Ans:a
16.Full restraint is provided by
(i)foundation footing of a wall
(ii) timber
floor spanning on the wall and anchored to the wall
(iii) RCC
slab with a minimum bearing of 10 cm on the wall
Of these statements
(i) and (iii) are correct
(i) and
(ii) are correct
(ii) and
(iii) are correct
(i), (ii) and (iii) are correct
17. 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
Ans:a
18. 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
Ans:d
19. 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.
Ans:c
20. 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
Ans:b
21. Water retentivity for brick masonry should not be
less than a) 50%
b) 60%
c) 70%
d) 80%
Ans:c
22. Minimum
compressive strength in N/mm2 for H1 type mortar used for masonry is
a) 3
b) 5
c) 7.5
d) 10
Ans:d
23. 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
Ans:a
24. 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
Of these 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
Ans:b
25. 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
Ans:b
26. 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
Ans:a
27. 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.
Of these statements, the correct statements are
a) (i) and
(ii)
b) (i) and
(iii)
c) (ii) and
(iv)
d) (ii) and
(iii)
Ans:d
28. 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)
Ans:d
29. Assertion A : Limiting value of slenderness ratio
for a column is less than that of a wall. Reason R : A column can buckle around
either of the two horizontal axes while a wall can buckle around only one axis.
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.
Ans:a
30. 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.
Of these 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
Ans:a
31. Consider the following statements :
The use of relatively weak mortar
1. will
accommodate movements due to loads and, cracking if any, and will be
distributed as thin hair cracks which are less noticeable or harmful.
2. will
result in reduction of stresses due to differential expansion of masonry units.
Of these statements
a)1 alone is correct
b) 2
alone is correct
c) both
1 and 2 are correct
d) neither
1 nor 2 is correct
Ans:c
32. In the case of panel wall subjected to horizontal loads
at right angles to the plane of the wall, with the mortar not leaner than Ml
type, tensile stress in bending in the vertical direction may be allowed to the
extent of
a) 0.4 kg/cm2
b) 0.7
kg/cm2
c) 1.0
kg/cm2
d) 1.2
kg/cm2
Ans:c
33. 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
Ans:a
34. Consider the following statements : Sand in mortar is
needed for
1. decreasing
the quantity of cement.
2. reducing
shrinkage.
3. decreasing
the surface area of the binding material.
4. increasing
the strength.
Of these statements:
a) 2, 3
and 4 are correct
b) 1,2
and 3 are correct
c) 1,3
and 4 are correct
d) 1,2
and 4 are correct
Ans:d
35. Consider the following statements:
A high lime content
in a composite cement-lime mortar results in
1. slow
hardening.
2. quick
setting.
3. weaker
mortar.
Of these 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
Ans:c
36. 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
Ans: b
37. 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%
Ans:b
38. 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
Ans:a
39. 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) 0.090
b) 0.095
c) 0.100
d) 0.105
Ans:c
40.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
Ans:c
41. 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.
Ans:c
42. Consider the
following statements:
1. Masonry
in rich cement mortar though having good strength with high shrinkage is much
liable for surface cracks.
2. Lime
mortar possesses poor workability and poor water retentivity and also suffers
high shrinkage.
3. Masonry
in lime mortar has better resistance against rain penetration and is less
liable to crack when compared to masonry in cement mortar.
Which of these statements are correct?
a) 1,2 and 3
b) 1
and 2
c) 2
and 3
d) 1
and 3
Ans:d
43. 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
Ans:a
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