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121.

The discharge of a centrifugal pump working under constant head

increases

decreases

122.

The power of a centrifugal pump working under constant head and discharge increases with the speed.

True

False

123.

Which of the following pump is generally used to pump highly viscous fluid?

A.	Centrifugal pump	B.	Reciprocating pump
C.	Air lift pump	D.	Screw pump

124.

If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

A.	geometric similarity	B.	kinematic similarity
C.	dynamic similarity	D.	none of these

125.

If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.

Right

Wrong

126.

If the ratios of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

A.	geometric similarity	B.	kinematic similarity
C.	dynamic similarity	D.	none of these

127.

Geometric similarity is said to exist between the model and the prototype, if both of them

A.	have identical velocities	B.	are equal in size and shape
C.	are identical in shape, but differ only in size	D.	have identical forces

128.

Dynamic similarity is said to exist between the model and the prototype, if both of them

A.	have identical velocities	B.	are equal in size and shape
C.	are identical in shape, but differ only in size	D.	none of the above

129.

Kinematic similarity is said to exist between the model and the prototype, if both of them

A.	have identical velocities	B.	are equal in size and shape
C.	are identical in shape, but differ only in size	D.	have identical forces

130.

Which type of the pump is defferent from others in the same group?

A.	Screw pump	B.	Gear pump
C.	Cam and piston pump	D.	Plunger pump