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121.

A good Portland cement when tested for fineness, the percentage of residue left after sieving in 90 micron IS sieve should not exceed 10 percent.

True

False

122.

Le-chatelier method is used to determine

A.	initial setting of cement	B.	fineness of cement
C.	soundness of cement	D.	normal consistency of cement

123.

The expansion of cement should not exceed

A.	5 mm	B.	10 mm
C.	15 mm	D.	20 mm

124.

The normal consistency of Portland cement is about

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

125.

The initial setting time of rapid hardening cement should not be less than

A.	30 min	B.	1 hour
C.	4 hours	D.	8 hours

126.

The final setting time of ordinary cement should not be more than

A.	2 hours	B.	4 hours
C.	8 hours	D.	10 hours

127.

The addition of pozzolana to Portland cement causes

A.	less heat of hydration	B.	increase in shrinkage
C.	decrease in permeability	D.	all of these

128.

The rate of hydration and hydrolysis of cement depends upon its

A.	soundness	B.	fineness
C.	setting time	D.	tensile strength

129.

The compressive strength of ordinary cement is less than its tensile strength.

Right

Wrong

130.

The percentage of the residue left after sieving good Portland cement in 90 micron sieve should not exceed

A.	5%	B.	10%
C.	20%	D.	30%