Practice Test: Question Set - 03
1. If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:
- (A) (1 - C) mf - eE
- (B) (C - 1) mf + eE
- (C) (C - 1) mf - eE
- (D) (1 - C) mf + eE
2. In a pre-stressed member it is advisable to use
- (A) Low
strength concrete only
- (B) High
strength concrete only
- (C) Low
strength concrete but high tensile steel
- (D) High
strength concrete and high tensile steel
3. An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
- (A) Triangular
load of the wall
- (B) UDL of wall
- (C) UDL
of wall + load from the roof
- (D) Triangular
load + load from the roof
4. The minimum clear cover for R.C.C. columns shall be
- (A) Greater of
40 mm or diameter
- (B) Smaller
of 40 mm or diameter
- (C) Greater of
25 mm or diameter
- (D) Smaller
of 25 mm or diameter
5. The minimum thickness of a flat slab is taken
- (A) L/32 for end panels without drops
- (B) L/36
for end panels without drops
- (C) L/36 for interior panels without drop
- (D) All the
above
6. The design of heel slab of a retaining wall is based on the maximum bending moment due to:
- (A) Its own
weight
- (B) Weight of
the soil above it
- (C) Load of the
surcharge, if any
- (D) All
the above
7. An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is
- (A) Safe in
shear
- (B) Is safe with
stirrups
- (C) Is safe with
stirrups and inclined members
- (D) Needs
revision of the section
8. The neutral axis of a T-beam exists
- (A) Within
the flange
- (B) At
the bottom edge of the slab
- (C) Below
the slab
- (D) All
the above
9. A pre-cast pile generally used, is
- (A) Circular
- (B) Square
- (C) Octagonal
- (D) Square
with corners chamfered
10. The spacing of transverse reinforcement of column is decided by the following consideration.
- (A) The
least lateral dimension of the column
- (B) Sixteen
times the diameter of the smallest longitudinal reinforcing rods in the column
- (C) Forty-eight
times the diameter of transverse reinforcement
- (D) All the
above
11. The self-weight of the footing, is
- (A) Not
considered for calculating the upward pressure on footing
- (B) Also
considered for calculating the upward pressure on footing
- (C) Not
considered for calculating the area of the footing
- (D) Both (b) and
(c)
12. If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is
- (A) D =
0.0775 a
- (B) D =
0.775 a
- (C) D =
0.775 √a
- (D) D =
0.775 a2
13. Pick up the incorrect statement from the following:
- (A) In the stem
of a retaining wall, reinforcement is provided near the earth side
- (B) In
the toe slab of a retaining wall, reinforcement is provided at the bottom of
the slab
- (C) In the heel
slab of a retaining wall, reinforcement is provided at the top of the slab
- (D) None of
these
14. After pre-stressing process is completed, a loss of stress is due to
- (A) Shrinkage of
concrete
- (B) Elastic
shortening of concrete
- (C) Creep
of concrete
- (D) All the
above
15. In a simply supported slab, alternate bars are curtailed at
- (A) 1/4th of the
span
- (B) 1/5th of the
span
- (C) 1/6th
of the span
- (D) 1/7th of the
span
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