Civil engineer objective questions – Structural Analysis and Design (Section-10)

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