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41.

The overall efficiency of a reaction turbine is the ratio of

A.	power produced by the turbine to the energy actually suppied by the turbine	B.	actual work available at the turbine to the energy imparted to the wheel
C.	workdone on the wheel to the energy (or head of water) actually supplied to the turbine	D.	none of the above

42.

A Kaplan turbine is an axial flow reaction turbine.

Correct

Incorrect

43.

In a Francis turbine runner, the number of blades are generally between

A.	2 to 4	B.	4 to 8
C.	8 to 16	D.	16 to 24

44.

In a Kaplan turbine runner, the number of blades are generally between

A.	2 to 4	B.	4 to 8
C.	8 to 16	D.	16 to 24

45.

Which of the following is not a reaction turbine?

A.	Furneyron turbine	B.	Jonval turbine
C.	Thomson's turbine	D.	Pelton wheel

46.

The Furneyron turbine is

A.	an axial flow	B.	an inward flow
C.	an outward flow	D.	a mixed flow

47.

The Thomson's turbine is

A.	an axial flow	B.	an inward flow
C.	an outward flow	D.	a mixed flow

48.

In a Francis turbine, the pressure at inlet is

less than

more than

49.

The flow ratio of Francis turbine is defined as the ratio of the

A.	velocity of flow at inlet to the theoretical jet velocity	B.	theoretical velocity of jet to the velocity of flow at inlet
C.	velocity of runner at inlet to the velocity of flow at inlet	D.	none of the above

50.

The flow ratio in case of Francis turbine varies from

A.	0.15 to 0.3	B.	0.4 to 0.5
C.	0.6 to 0.9	D.	1 to 15