500 Best Concrete Technology- MCQ
Q25). The proportion of lime, silica, alumina and iron oxide in a good portland cement should be
a).63:22:6:3
b).63:22:3:6
c).22:63:6:3
d).22:63:3:6
Correct Answer:
63:22:6:3
Explanation:
Q26). The chemical ingredient of cement which provides quick setting property to the cement is
a).lime
b).silica
c).alumina
d).iron oxide
Correct Answer:
alumina
Explanation:
Q27). The presence of lime in cement
a).makes the cement sound
b).provides strength to the cement
c).lowers the clinkering temperature
d).all of these
Correct Answer:
provides strength to the cement
Explanation:
Q28). The gypsum is added to the cement for
a).providing high strength to the cement
b).controlling the initial setting time of cement
c).lowering the clinkering temperature of cement
d).all of the above
Correct Answer:
controlling the initial setting time of cement
Explanation:
Q29). Which of the following ingredient of cement when added in excess quantity, causes the cement to set slowly?
a).lime
b).silica
c).alumina
d).iron oxide
Correct Answer:
silica
Explanation:
Q30). Lime when added in excess quantity
a).make the cement unsound
b).causes the cement to expand and disintegrate
c).lowers the clinkering temperature of cement
d).Both A and B
Correct Answer:
Both A and B
Explanation:
Q31). In order to provide colour, hardness and strength to the cement, the ingredient used is
a).lime
b).silica
c).alumina
d).iron oxide
Correct Answer:
iron oxide
Explanation:
Q32). After the final grinding, the cement is sieved through IS sieve number
a).9
b).12
c).24
d).48
Correct Answer:
9
Explanation: