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151.

In a centrifugal pump installation while starting, the position of delivery valve is

152.

A body floats in stable equilibrium

A.	When the C.G. of body is below the centre of buoyancy	B.	When the C.G. of body is above the surface of water
C.	When the metacentric height is zero	D.	When the metacentre is above C.G.
E.	When the metacentre is below C.G.

153.

The centre of buoyancy is

A.	The point of intersection of the buoyant force and the centre line of the body	B.	Centre of gravity of the body
C.	Centroid of displaced volume of fluid	D.	Mid-point between C.G. and metacentre

154.

The metacentre is

A.	Centroid of the displaced volume of fluid	B.	Centre of pressure of the displaced volume of fluid
C.	Point of intersection of buoyant force and gravitational force	D.	Point of intersection of buoyant force and centre line of body
E.	Mid-point between C.G. and centre of buoyancy of a body

155.

The gentre of gravity of the volume of liquid displaced by an immersed body is called

156.

Air vessels in a reciprocating pump are fitted to

A.	Reduce the acceleration head	B.	Reduce suction head
C.	Increase delivery head	D.	Smoothen delivery head
E.	Increase the opening speed of pump

157.

Air vessels in a reciprocating pump is

A.	Fitted in the suction line	B.	Fitted in the delivery line
C.	A cast iron chamber having an opening at the base	D.	A, B and C above together
E.	None of the above

158.

1 m of water column is equivalent to

159.

If the specific speed of a pump is in the range 170 to 400, the type of pump would be

160.

Type of impeller used in mud pumps is