For flow of water in tube, the velocity at surface is ___________

A zero
B equal to velocity at 1/3 of diameter
C equal to velocity at 1/2 of diameter
D equal to velocity at centre



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The coefficient of permeability of the two soil layers 1 and 2 in soil deposit is 9*10-7 cm/s and 4*10-7 cm/s respectively. The thickness of the layers is equal. The value of average permeability parallel to bedding planes is ________
A 4.5*10-7 cm/s
B 5.5*10-7 cm/s
C 6.5*10-7 cm/s
D 7.5*10-7 cm/s

The coefficient of permeability of the two soil layers 1 and 2 in soil deposit is 9*10-7 cm/s and 4*10-7 cm/s respectively. The thickness of the layers is equal. The value of average permeability perpendicular to bedding planes is ________
A 4.5*10-7 cm/s
B 5.5*10-7 cm/s
C 6.5*10-7 cm/s
D 7.5*10-7 cm/s

Each layer of stratified soil deposit has its own coefficient of permeability.
A True
B False
C NA
D NA

The average coefficient of permeability of whole deposit will depend upon _________
A direction of flow with respect to bedding plane
B direction of flow but not with respect to the bedding plane
C length of the bedding plane
D width of the bedding plane

A soil deposit has three layers of soil. The permeability of the second layer is twice that of the first layer and the permeability of the third layer is thrice that of the first layer. The thickness of each layer is 5m. What will be its average permeability parallel to the bedding plane?
A k
B 2k
C 3k
D 4k


What will be its average permeability perpendicular to the bedding plane if a soil deposit has three layers of soil? The permeability of the second layer is 1/2 that of the first layer and the permeability of the third layer is 1/3 that of the first layer. The thickness of each layer is equal.
A k
B 1/2k
C 1/3k
D 1/4k

The capillary-permeability test, is used to determine ___________
A Coefficient of permeability and Capillary test
B Degree of saturation
C None of the mentioned
D All of the mentioned

The bedding planes of soil layers in soil mass may be __________
A Horizontal
B Vertical
C Inclined
D All of the mentioned

Each layer of soil layer has its own value of ___________
A Degree of saturation
B Coefficient of permeability
C Capillary head
D All of the mentioned

The saturation in capillary-permeability is assumed to be ___________ percentage.
A 0
B 50
C 75
D 100