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71.

Low heat cement contains more lime than ordinary Portland cement.

True

False

72.

Blast furnace slag cement

A.	develops low heat of hydration	B.	has less early strength
C.	develops high heat of hydration	D.	has high early strength
E.	Both (a) and (b)

73.

Which of the following cements is expected to have the highest compressive strength after 3 days.

A.	ordinary Portland cement	B.	rapid hardening cement
C.	high alumina cement	D.	sulphate resisting cement

74.

For a structure subjected to the action of sea water, the cement used is

A.	rapid hardening cement	B.	low heat cement
C.	high alumina cement	D.	sulphate resisting cement

75.

The strength of concrete using air entraining cement gets reduced by

A.	5 to 10%	B.	10 to 15%
C.	15 to 20%	D.	20 to 25%

76.

"Colocrete" is the commercial term for

A.	high alumina cement	B.	coloured cement
C.	low heat cement	D.	rapid hardening cement

77.

Pezzolana is essentially a silicious material containing clay upto

A.	20%	B.	40%
C.	60%	D.	80%

78.

In the manufacture of possolana cement, the amount of pozzolana material added to ordinary Portland cement clinkers is about

A.	20%	B.	30%
C.	40%	D.	50%

79.

Which of the following statement is correct?

A.	Sulphate resisting cement is particularly used for canal lining.	B.	Low heat cement should not be used for thin concrete structures.
C.	Rapid hardening cement should not be used for massive concrete structures	D.	all of the above

80.

The degree of grinding of cement is called

A.	fineness	B.	soundness
C.	impact value	D.	bulking