Engineering :: Hydraulics and Fluid Mechanics

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61.

When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the

A.	sum	B.	difference
C.	arithmatic mean	D.	geometric mean

62.

The stability of a dam is checked for

A.	tension at the base	B.	overturning of the wall or dam
C.	sliding of the wall or dam	D.	all of these

63.

When a body is placed over a liquid, it is subjected to gravitational force and upthrust of the liquid.

True

False

64.

When a body is placed over a liquid, it will sink down if

A.	gravitational force is equal to the upthrust of the liquid	B.	gravitational force is les than the upthrust of the liquid
C.	gravitational force is more than the upthrust of the liquid	D.	none of the above

65.

When a body is placed over a liquid, it will float if

A.	gravitational force is equal to the upthrust of the liquid	B.	gravitational force is less than the upthrust of the liquid
C.	gravitational force is more than the upthrust of the liquid	D.	none of the above

66.

When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

A.	Pascal's law	B.	Archimede's principle
C.	principle of floatation	D.	Bernoulli's theorem

67.

The tendency of a liquid to uplift a submerged body, because of the upward thrust of the liquid, is known as buoyancy.

Agree

Disagree

68.

The force of buoyancy is always

A.	equal to	B.	less than
C.	more than

69.

The body will float if the force of buoyancy is

A.	equal to	B.	less than
C.	more than

70.

The body will sink down if the force of buoyancy is

A.	equal to	B.	less than
C.	more than