500 Best Concrete Technology- MCQ
Q145). The minimum quantity of cement to be used in controlled concrete is specified as
a).120 kg/cm3
b).160 kg/cm3
c).220 kg/cm3
d).280 kg/cm3
Correct Answer:
220 kg/cm3
Explanation:
Q146). The concrete in which no preliminary tests are performed for designing the mix is called
a).rich concrete
b).controlled concrete
c).lean concrete
d).ordinary concrete
Correct Answer:
ordinary concrete
Explanation:
Q147). The ordinary concrete is not used for ………… grade of concrete mix.
a).M 10
b).M 20
c).M 25
d).M 40
Correct Answer:
M 40
Explanation:
Q148). The water used for ordinary concrete is equal to 5% by weight of aggregate Plus ……… by weight of cement
a).0.1
b).0.2
c).0.3
d).0.4
Correct Answer:
0.3
Explanation:
Q149). For reinforced cement concrete lintels and slabs, the nominal size of coarse aggregate should not exceed
a).10 mm
b).15 mm
c).20 mm
d).40 mm
Correct Answer:
15 mm
Explanation:
Q150). The factor which affects the design of concrete mix is
a).fineness modulus
b).water cement ratio
c).Slump
d).all of these
Correct Answer:
all of these
Explanation:
Q151). The number of bags of cement required per cubic metre of 1:2:4 concrete will be approximately
a).2 to 3
b).3 to 4
c).4 to 5
d).5 to 6
Correct Answer:
5 to 6
Explanation:
Q152). The Importance of storing the various ingredients of concrete is
a).to maintain the uniformity of grading
b).to maintain the uniformity of moisture
c).to maintain the strength of materials
d).both A and B
Correct Answer:
both A and B
Explanation: