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71.

The smallest sieve size according to Indian standards is

A.	0.0045 mm	B.	0.045 mm
C.	0.45 mm	D.	0.154 mm

72.

According to Indian standards, in a 2 mm sieve

A.	there are two holes	B.	each sieve is circular and its diameter is 2 mm
C.	each hole is a square and its side is 2 mm	D.	there are two holes per cm length of the mesh

73.

Sieving is not practicable for grain sizes smaller than about

A.	0.075 mm	B.	0.095 mm
C.	0.15 mm	D.	0.2 mm

74.

The effective size of a soil is

A.	D10	B.	D20
C.	D40	D.	D60

75.

The uniformity co-efficient of soil is defined as the ratio of

A.	D40 to D10	B.	D40 to D20
C.	D50 to D10	D.	D60 to D10

76.

The particle size range is measured by

A.	effective size	B.	curvature coefficient
C.	uniformity coefficient	D.	none of these

77.

A soil having particles of nearly the same size is known as

A.	uniform soil	B.	poor soil
C.	well graded soil	D.	coarse soil

78.

A soil having uniformity co-efficient more than 10, is called

A.	uniform soil	B.	poor soil
C.	well graded soil	D.	coarse soil

79.

The uniformity coefficient for a uniformly graded soil is nearly unity.

Agree

Disagree

80.

Stoke's law is applicable to particles upto

A.	0.0002 mm	B.	0.002 mm
C.	0.02 mm	D.	0.2 mm