500 Best Concrete Technology- MCQ
Q137). For mass concrete in pier and abutments, the grade of concrete mix used, is
a). 1:1:2
b). 1:1.5:3
c). 1:2:4
d). 1:3:6
Correct Answer:
1:3:6
Explanation:
Q138). In performing the works test
a).the mould for test specimen should be made of non absorbent material
b).the mould should be constructed in such a way that there is leakage of water from test specimen during moulding
c).the base plate of the mould should be of non absorbent material
d).all of the above
Correct Answer:
all of the above
Explanation:
Q139). For highly loaded columns, the concrete mix used is of proportion
a). 1:1:2
b). 1:1.5:3
c). 1:2:4
d). 1:3:6
Correct Answer:
1:1:2
Explanation:
Q140). The correct proportioning of various ingredients of concrete largely depends upon
a).bulking of sand
b).water content
c).absorption
d).all of these
Correct Answer:
all of these
Explanation:
Q141). If the proportions of different ingredients (cement, sand and aggregate) are in the ratio of 1:2:4, then the grade of concrete is
a).M 10
b).M 15
c).M 20
d).M 25
Correct Answer:
M 15
Explanation:
Q142). If 30% excess water is added, the strength of concrete is reduced by
a).0.3
b).0.4
c).0.5
d).0.6
Correct Answer:
0.5
Explanation:
Q143). The concrete in which preliminary tests are performed for designing the mix is called
a).rich concrete
b).controlled concrete
c).lean concrete
d).ordinary concrete
Correct Answer:
controlled concrete
Explanation:
Q144). The maximum quantity of aggregate per 50kg of cement should not exceed
a).100 kg
b).200 kg
c).350 kg
d).450 kg
Correct Answer:
450 kg
Explanation: