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61.

The density of soil mass is expressed in

A.	kg / m2	B.	kg / m3
C.	N / m2	D.	N / m3

62.

If the volume of voids is equal to the volume of soil solids, then the values of porosity and void ratio are respectively

A.	0 and 0.5	B.	0 and 1
C.	0.5 and 1	D.	1 and 0.5

63.

The water content of soils can be accurately determined by

A.	sand bath method	B.	calcium carbide method
C.	over drying method	D.	Pycnometer method

64.

The specific gravity of soil solids is determined by

A.	Pycnometer method	B.	hydrometer analysis
C.	sieve analysis	D.	all of these

65.

Stoke's law is used to determine the

A.	specific gravity of soil solids	B.	density of soil suspension
C.	grain size distribution of those soils whose grain size is finer than 0.075 mm	D.	all of the above

66.

Hydrometer analysis is used to determine the density of soil suspension.

Agree

Disagree

67.

The standard temperature at which the hydrometer is calibrated is

A.	10?C	B.	15?C
C.	20?C	D.	27?C

68.

When the hydrometer analysis is performed, it requires correction for

A.	temperature only	B.	meniscus only
C.	dispersing agent only	D.	all of these

69.

According to Stoke's law, the velocity at which grains settle out of suspension, all other factors being equal, is dependent upon

A.	shape of the grain	B.	weight of the grain
C.	size of the grain	D.	all of these

70.

According to Indian standards, the dispersing solution used in pipette method, for the determination of size of particle consists of

A.	7 g sodium carbonate, 43 g sodium hexameta-phosphate and 1 litre distilled water	B.	7 g sodium carbonate, 33 g sodium hexameta-phosphate and 1 litre distilled water
C.	7 g sodium carbonate, 23 g sodium hexameta-phosphate and 1 litre distilled water	D.	any one of the above