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91.

The length of Vicat plunger in Vicat's apparatus varies from

A.	20 to 30 mm	B.	30 to 40 mm
C.	40 to 50 mm	D.	50 to 60 mm

92.

The percentage of water for making a cement paste of normal consistency varies from

A.	15 to 25%	B.	25 to 35%
C.	35 to 50%	D.	50 to 60%

93.

To perform the initial setting time test, the water is added to the cement at the rate of

A.	0.72 P	B.	0.78 P
C.	0.85 P	D.	0.95 P

94.

Le-chatelier apparatus is used to perform

A.	fineness test	B.	soundness test
C.	consistency test	D.	compressive strength test

95.

To perform the soundness test, the water is added to the cement at the rate of 0.72 P by weight of cement, where P is the percentage of water required for normal consistency paste.

Correct

Incorrect

96.

Initial setting time of ordinary Portland cement is

A.	15 min	B.	30 min
C.	60 min	D.	10 h

97.

For performing the compressive strength test of cement, the size of cube mould should be 7.06 cm side.

Right

Wrong

98.

According to Indian standard specifications for the compressive strength test of cement, the cement and standard sand mortar in the ratio of

A.	1 ; 1	B.	1 ; 2
C.	1 ; 3	D.	1 ; 4

99.

During field test, the cement is said to be pure and of good quality when

A.	the colour of cement is uniformly greenish grey	B.	a handful of cement, thrown into a bucket of water, floats
C.	hand is thrusted into a bag of cement, it feels cool	D.	all of the above

100.

The inert mineral material used for the manufacture of mortars and concretes is

A.	cement	B.	water
C.	aggregate	D.	admixture