1. The factor of safety for steel is based on its
a ) ultimate stress
b ) yield stress
c ) both ( a ) and ( b ) above
d ) none of the above
2. The modular ratio for design purpose for Mis concrete is taken as
a ) 12.67
b ) 15.67
c ) 18.67
d ) 21.67
3. The approximate allowable stress in bending compression in RCC is
a ) 0.25fck
b ) 0.33fck
c ) 0.44fck
d ) none of the above
4. Minimum embedment of reinforcement in concrete member should be
a ) 30 Φ
b ) 40 Φ
c ) 50 Φ
d ) 60 Φ
5. Cement used for resisting of acid is
a ) portland pozzolana cement
b ) ordinary portland cement
c ) rapid hardening portland cement
d ) high alumina cement
6. Modulus of rupture is measure of
a ) direct tensile strength
b ) split tensile strength
c ) flexural tensile strength
d ) direct compressive strength
7. The size of fine aggregates does not exceed
a ) 2.75mm
b ) 3.75mm
c ) 4.75mm
d ) 5.75mm
8. The factor of safety for steel as compared to concrete is
a ) same
b ) lower
c ) higher
d ) constant
9. Factor of safety of concrete is given by
a) ultimate load/working load
b ) working load/ultimate load
c ) ( u + w ) load
d ) ( w – u ) load
10. Shrinkage in concrete increases its
a ) tensile strength
b ) flexural strength
d ) shear strength
c ) bond strength
11. Modulus of elasticity for concrete improves by
a ) age
b ) higher w / c ratio
c ) shorter curing period
d ) all of the above
12. Which types of vibrator is generally used in concrete work ?
a ) surface
b ) screen
c ) needle
d ) none
13. The sand which contains more proportion of salt is
a ) river
b ) pond
c ) sea
d ) all of the above
14. The maximum bulking factor for sand is
a ) 1.00
b ) 1.10
c ) 1.20
d ) 1.40
15. The maximum bulking of sand generally occurs at a percentage moisture content of
a ) 5
b ) 8
c ) 11
d ) 4
16. Cement used in the construction of docks & harbours is
b ) RHPC
a ) SRPC
c ) air entraining cement
d ) slag cement
17. Presence of oils in water for concreting
a ) improves strength
b ) gives more slump
c ) reduces workability
d ) reduces strength
18. Minimum curing period for cement concrete work is
a ) 24 hrs
b ) 2 day
c ) 3 days
d ) 7 days
19. Slender column is a ……….column .
a ) short
b ) long
c ) mix .
d ) column of varying c / s
20. The spacing of shear reinforcements in rectangular beam is
a ) minimum near the support
b ) maximum near the support
c ) minimum near the centre
d ) maximum near the centre
21. Shear in a concrete beam is caused by
a ) props only
b ) variation of B.M along the span
c ) weak bond
d ) none of the above
22. In cold weather , concrete curing should be continued for ….. days .
a ) 7
b ) 14
c ) 21
d ) 28
23. If concrete grade is M , then what would be the modular ratio
a ) 7.08
b ) 9.08
c ) 7
d ) 13.33
24. Surface vibrator is effective only when the thickness of concrete does not exceed
a ) 5 cm
b ) 70 cm
c ) 15 cm
d ) 20 cm
