MCQs Civil Engineering
1. Characteristic strength of concrete is measured at:
a. 14 Day
b. 28 Day
c. 91 Day
d. 7 Day
ans (b)
2. Additional cover thickness in reinforced Cement concrete member totally immersed in sea water is:
a. 25 mm.
b. 30 mm.
c. 35 mm.
d. 40 mm.
ans (d)
3. The characteristic strength of concrete in the actual structure is taken as :
a. fck
b. 0.85 fck
c. 067 fck
d. 0.447 fck
Ans (c)
4. Poisson's ratio for concrete
a. remains constant
b. increases with richer mixes
c. Decreases with richer mixes.
d. None of the above
ans (b)
5. M-50 is considered as .........type of concrete.
a. Ordinary
b. Stamdard
c. High Strength
d. All of the Above
ans (b)
6. The ratio of various ingredients(cement, sand, aggregate) in concrete of grade M 20 is:
a. 1 : 2 :4
b. 1 : 3 : 6
c. 1 : 1.5 :3
d. 1 : 1 : 2
ans (c)
7. Ordinary concrete is not used for concrete
a. M 10
b. M 15
c. M 28
d. M 40
ans (d)
8. Permissible Compressive Strenght of M-20 concrete grade is:
a. 100 kg/cm2
b. 150 kg/cm2
c. 200 kg/cm2
d. 250 kg/cm2
ans (c)
9. I.S.I. has specified the full strength of concrete after
a. 7 Day after
b. 14 Day after
c. 21 Day after
d. 28 Day after
ans (d)
10. In which type of concrete there is absence of calillary passages and there is no transmission of water by capillary action:
a. No fines concrete
b. Pre cast concrete
c. Light weight concrete
d. Pre stressed concrete
ans (a)