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91.

The fuel generally used for burning limestone is

A.	coal	B.	charcoal
C.	firewood	D.	any one of these

92.

During the process of burning limestone, clay forms certain compound which

A.	gives hydraulic lime	B.	gives power of quick setting
C.	does not allow to be dissolved in the outside water when used in damp situations	D.	all of the above

93.

The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known as

A.	calcination	B.	hydration
C.	slaking	D.	quenching

94.

The advantage of adding pozzolana (or surkhi) to lime is to

A.	reduce shrinkage	B.	increase resistance to cracking
C.	increase resistance to chemical attack	D.	all of these

95.

The commonly used lime in white washing is

A.	quick lime	B.	fat lime
C.	lean lime	D.	hydraulic lime

96.

The lime mortar is made from

A.	quick lime	B.	fat lime
C.	lean lime	D.	hydraulic lime

97.

Quick lime on reaction with water gives

A.	hydraulic lime	B.	slaked lime
C.	hydrated lime	D.	poor lime

98.

Hydraulic lime generates

A.	same	B.	less
C.	more

99.

The constituent in lime which retard the slaking action and increase the rapidity of setting, is

A.	silica	B.	sulphate
C.	alkalies	D.	alumina

100.

The main constituent of a Portland cement is

A.	lime	B.	alumina
C.	iron oxide	D.	alkalies