100 Best Building Materials- Cement MCQ
Q25). The standard sand now a days used in India, is obtained from
a).Jaipur (Rajasthan)
b).Jullundur (Punjab)
c).Hyderabad (Andhra Pradesh)
d).Ennore (Madras)
Correct Answer:
Ennore (Madras)
Explanation:
Q26). The maximum amount of dust which may be permitted in aggregates is
a).5% of the total aggregates for low workability with a coarse grading
b).10% of the total aggregates for low workability with a fine grading
c).20% of the total aggregates for a mix having high workability with fine grading
d).all the above.
Correct Answer:
all the above.
Explanation:
Q27). Proper proportioning of concrete, ensures
a).desired strength and workability
b).desired durability
c).resistance to water
d).all the above.
Correct Answer:
all the above.
Explanation:
Q28). The bulk density of aggregates does not depend upon :
a).size and shape of aggregates
b).specific gravity of aggregates
c).grading of aggregates
d).size and shape of the container
Correct Answer:
size and shape of the container
Explanation:
Q29). Curing
a).reduces the shrinkage of concrete
b).preserves the properties of concrete
c).prevents the loss of water by evaporation
d).all of the above.
Correct Answer:
all of the above.
Explanation:
Q30). While compacting the concrete by a mechanical vibrator, the slump should not exceed
a).2.5 cm
b).5.0 cm
c).7.5 cm
d).10 cm
Correct Answer:
5.0 cm
Explanation: