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171.

Which is the correct statement

A.	In volute casing the velocity of water decreases but pressure increases	B.	In volute casing the velocity of water and also pressure increase
C.	Volute casing is improvement over the vortex casing	D.	Volute casing provides diffusering
E.	None of the above

172.

Atmospheric pressure held in terms of water column is

A.	7.5 m	B.	8.5 m
C.	9.81 m	D.	10.30 m

173.

Which type of pump is different from the others?

A.	Simplex pump	B.	Plunger pump
C.	Piston pump	D.	Duplex pump
E.	Centrifugal pump

174.

The statement "For laminar flow through a fine porous bed or capillary passages in a solid, the velocity based on the total cross-section is proportional to the ratio of pressure gradient to viscosity" is known as

A.	Fick's law	B.	Reynolds hypothesis
C.	Schmidt's law	D.	Stock's law
E.	Darcy's law of permeability

175.

Which one is different from the others?

A.	Axial flow impeller	B.	Mixed flow impeller
C.	Warped vane impeller	D.	Open impeller
E.	Shrouded impeller

176.

In axial flow turbine

A.	Only part of the available head is converted into velocity before the water enters the wheel	B.	Water admitted over part of the circumference
C.	It is necessary that wheel should always run full	D.	It is possible to regulate the flow
E.	Depends upon other factors

177.

A Pelton wheel is

A.	Inward flow impulse turbine	B.	Outward flow impulse turbine
C.	Inward flow reaction turbine	D.	Aoutward flow reaction turbine
E.	Axial flow impulse turbine

178.

Runway speed of a Pelton wheel is

A.	Actual operating speed	B.	No lead speed
C.	Full load speed	D.	No load speed when governor mechanism fails
E.	90% greater than normal speed

179.

Spouting velocity is

A.	Ideal velocity of jet	B.	50% of ideal velocity of jet
C.	Actual velocity of jet	D.	Velocity of jet under some specified conditions
E.	None of the above

180.

In a reaction turbine

A.	It is possibel to regulate the flow without loss	B.	It must be placed at the foot of the fall and above the tail race
C.	Work done is purely by the change in the kinetic energy of the jet	D.	Only part of the head is converted into velocity before the water enters the wheel
E.	None of the above