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73.

74.

75.

76.

77.

78.

The preparation of surface of stone to obtain plain edges or to obtain stones of
required size and shape is called

A) Blasting of stones B) Seasoning of stones

C) Dressing of stones D) Quarrying of stones

Which of this IS code provides specification for 53 grade OPC cement ?
A) 1S 8112: 1989 B) IS 8041 : 1990
C) IS 12269 : 1987 D) IS 1489

Which of the following statement is correct about Portland Pozolana Cement (PPC) ?
A) The long term strength of PPC is less and it has reduced heat of hydration and
permeability.

B) The long term strength of PPC is more and it has enhanced heat of hydration
and permeability.

C) The long term strength of PPC is more and it has reduced heat of hydration

and permeability.

D) The long term strength of PPC is less and it has reduced heat of hydration and
enhanced permeability.

The water quantity to be added for testing the compressive strength of cement is
(where P = Percentage of water required for normal consistency paste,
W1 = Weight of cement and W2 = Weight of sand.)

A) (P3 +4) % (W1 + W2) 8) (?4 + 2) % (W1 + W2)
9 (?4 + 3) % (W1 + W2) 0) (? + 3) % (W1 + W2)

The shape of the aggregate that is having maximum void ratio
A) Rounded B) Flaky C) Irregular D) Angular

As per IS 283 —1970 the aggregate impact value shall not exceed

A) 45% by weight for aggregate used for concrete in wearing surface and 30% for
concrete other than wearing surface.

B) 35% by weight for aggregate used for concrete in wearing surface and 45% for
concrete other than wearing surface.

C) 30% by weight for aggregate used for concrete in wearing surface and 45% for
concrete other than wearing surface.

D) 30% by weight for aggregate used for concrete in wearing surface and 40% for
concrete other than wearing surface.

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