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49.

The uplift pressure on the face of a drainage gallery in a dam is taken as

A.	hydrostatic pressure at toe	B.	average of hydrostatic pressure at toe and heel
C.	two-third of hydrostatic pressure at toe plus one-third of hydrostatic pressure at heel	D.	none of the above

50.

Horizontal acceleration due to earthquake results in

A.	hydrodynamic pressure	B.	inertia force into the body of the dam
C.	both (a) and (b)	D.	none of the above

51.

Hydrodynamic pressure due to earthquake acts at a height of

A.	3H/47I above the base	B.	3H747t below the water surface
C.	4H/371 above the base	D.	4H737t below the water surface where H is the depth of water.

52.

The major resisting force in a gravity dam is

A.	water pressure	B.	wave pressure
C.	self-weight of dam	D.	uplift pressure

53.

When the reservoir is full, the maximum compressive force in a gravity dam is produced

A.	at the toe	B.	at the heel
C.	within the middle third of base	D.	at centre of base

54.

The maximum permissible eccentricity for no tension at the base of a gravity dam is

A.	B/2	B.	B/3
C.	B/4	D.	B/6

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