500 Best Concrete Technology- MCQ
Q177). For compacting plain concrete or one way reinforced concrete floors, the vibrator used is
a).internal vibrator
b).screed vibrator
c).form vibrator
d).all of these
Correct Answer:
screed vibrator
Explanation:
Q178). When vibrators are used for compaction, the consistency of concrete depends upon the
a).type of mix
b).placing conditions
c).efficiency of vibrator
d).all of these
Correct Answer:
all of these
Explanation:
Q179). The levelling operation that removes humps and hollows and give a true, uniform concrete surface is called
a).Screeding
b).Floating
c).Trowelling
d).Compacting
Correct Answer:
Screeding
Explanation:
Q180). The final operation of finishing the concrete surface is called
a).Screeding
b).Floating
c).Trowelling
d).none of these
Correct Answer:
Trowelling
Explanation:
Q181). The process of hardening the concrete mixes by keeping its surface moist for a certain period is called
a).Floating
b).Curing
c).Screeding
d).none of these
Correct Answer:
Curing
Explanation:
Q182). The objective of curing is to
a).prevent the loss of water by evaporation
b).reduce the shrinkage of concrete
c).preserve the properties of concrete
d).all of these
Correct Answer:
all of these
Explanation:
Q183). After the curing of 28 days, the concrete gains strength up to
a).0.4
b).0.67
c).1
d).1.22
Correct Answer:
1
Explanation:
Q184). Proper curing of cement concrete, is good for its
a).volume stability
b).Strength
c).wear resistance
d).all of these
Correct Answer:
all of these
Explanation: