Engineering :: Hydraulics Machines

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101.

In a reciprocating pump, air vessels are fitted to the suction pipe and deliver pipe close to the cylinder of the pump.

True

False

102.

In a reciprocating pump, air vessels are used to

A.	smoothen the flow	B.	reduce suction head
C.	increase delivery head	D.	reduce acceleration head

103.

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

A.	39.20%	B.	48.80%
C.	84.80%	D.	88.40%

104.

In the above question, the saving in case of a double acting reciprocating pump is

A.	39.20%	B.	48.80%
C.	84.80%	D.	88.40%

105.

Power required to drive a centrifugal pump is

directly

inversely

106.

Delivery head of a centrifugal pump is

A.	directly proportional to N	B.	inversely proportional to N
C.	directly proportional to N2	D.	inversely proportional to N2

107.

Discharge of a centrifugal pump is

A.	directly proportional to diameter of its impeller	B.	inversely proportional to diameter of its impeller
C.	directly proportional to (diameter)2 of its impeller	D.	inversely proportional to (diameter)2 of its impeller

108.

Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.

Yes

109.

Power required to drive a centrifugal pump is directly proportional to

A.	diameter	B.	square of diameter
C.	cube of diameter	D.	fourth power of diameter

110.

The specific speed of a centrifugal pump may be defined as the speed of an imaginary pump, identical with the given pump, which will discharge one litre of water, while it is being raised through a head of one metre.

True

False