Practice Test: Question Set - 06
1. Concrete containing
- (A) Siliceous
aggregates, has higher co-efficient of expansion
- (B) Igneous
aggregates, has intermediate coefficient of expansion
- (C) Lime
stones, has lowest co-efficient of expansion
- (D) All
the above
2. The lower water cement ratio in concrete, introduces
- (A) Smaller
creep and shrinkage
- (B) Greater
density and smaller permeability
- (C) Improved
frost resistance
- (D) All the
above
3. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on
- (A) The front face in one direction
- (B) The front face in both directions
- (C) The inner face in one direction
- (D) The inner face in both directions
4. The aggregate containing moisture in pores and having its surface dry, is known as
- (A) Moist
aggregates
- (B) Very
dry aggregates
- (C) Dry
aggregates
- (D) Saturated
surface dry aggregate
5. Pick up the correct statement from the following:
- (A) Construction
joints in columns are provided a few cm below the junction of beam
- (B) Construction
joints in columns are provided at the bottom hunching
- (C) Construction
joints in beams and slabs are provided within middle third
- (D) All the
above
6. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is
- (A) 0.43 d
- (B) 0.55 d
- (C) 0.68 d
- (D) 0.85 d
7. Pick up the correct proportions of chemical ingredients of cement
- (A) Lime
: Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3
- (B) Silica :
Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3
- (C) Alumina :
Silica : Lime : Iron oxide : 63 : 22 : 6 : 3
- (D) Iron oxide :
Alumina : Silica : Lime : 63 : 22 : 6 : 3
8. Internal friction between the ingredients of concrete, is decreased by using
- (A) Less water
- (B) Fine
aggregates
- (C) Rich mix
- (D) More water
and coarse aggregates
9. Pick up the correct statement from the following:
- (A) The
quality of water governs the strength of concrete
- (B) 10%
excess of water reduces the strength of concrete by 15%
- (C) 30%
excess of water reduces the strength of concrete by 50%
- (D) All
the above
10. In pre-stressed concrete
- (A) Forces of tension and compression change but lever
arm remains unchanged
- (B) Forces of tension and compressions remain unchanged
but lever arm changes with the moment
- (C) Both forces of tension and compression as well as
lever arm change
- (D) Both forces of tension and compression as well as
lever arm remain unchanged
11. Pick up the correct statement from the following:
- (A) Lime
in excess, causes the cement to expand and disintegrate
- (B) Silica
in excess, causes the cement to set slowly
- (C) Alumina
in excess, reduces the strength of the cement
- (D) All the
above
12. If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is
- (A) 2000 bags
- (B) 2200 bags
- (C) 2400 bags
- (D) 2700 bags
13. The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
- (A) Segregation
- (B) Bleeding
- (C) Bulking
- (D) Creep
14. Workability of concrete for a given water content is good if the aggregates, are
- (A) Rounded
aggregate
- (B) Irregular
aggregate
- (C) Angular
aggregate
- (D) Flaky
aggregates
15. For preparing ordinary concrete, the quantity of water used, is
- (A) 5%
by weight of aggregates plus 20% of weight of cement
- (B) 10%
by weight of aggregates plus 10% of weight of cement
- (C) 5%
by weight of aggregates plus 30% of weight of cement
- (D) 30%
by weight of aggregates plus 10% of weight of cement
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