Engineering :: Hydraulics Machines

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11.

Work done by a turbine

depends

does not depend

12.

A Pelton wheel is

A.	tangential flow impulse turbine	B.	inward flow impulse turbine
C.	outward flow impulse turbine	D.	inward flow reaction turbine

13.

In an impulse turbine, the jet of water impinges on the bucket with a low velocity and after flowing over the vanes, leaves with a high velocity.

True

False

14.

An impulse turbine is used for

A.	low head of water	B.	high head of water
C.	medium head of water	D.	high discharge

15.

In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.

Agree

Disagree

16.

The head available at the inlet of the turbine is known as net or effective head.

Correct

Incorrect

17.

The gross or total head of the turbine is the

A.	sum	B.	difference
C.	product

18.

The hydraulic efficiency of an impulse turbine is the

A.	ratio of the actual power produced by the turbine to the energy actually supplied by the turbine	B.	ratio of the actual work available at the turbine to the energy imparted to the wheel
C.	ratio of the work done on the wheel to the energy of the jet	D.	none of the above

19.

The mechanical efficiency of an impulse turbine is

A.	ratio of the actual power produced by the turbine to the energy actually supplied by the turbine	B.	ratio of the actual work available at the turbine to the energy imparted to the wheel
C.	ratio of the work done on the wheel to the energy of the jet	D.	none of the above

20.

The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.

Yes