15.

16.

17.

18.

19.

20.

065/23

The hydraulic efficiency of a turbine is the ratio of

A) Mechanical energy in the output shaft at coupling and hydrodynamic energy
available from the fluid

B) Mechanical energy supplied by the rotor and hydrodynamic energy available
from the fluid

C) Useful hydrodynamic energy in the fluid at final discharge and mechanical
energy supplied to the rotor

D) Useful hydrodynamic energy in the fluid at final discharge and mechanical
energy supplied to the shaft and coupling

In reaction turbine, draft tube is used
A) To transport water downstream without eddies
B) For safety to turbine

C) To convert the kinetic energy to flow energy by a gradual expansion of the flow
cross-section

D) To increase the flow rate

When a centrifugal pump is started, there will be no flow of water until the pressure
rise in the impeller is large enough to overcome the

A) Manometric head B) Total head
C) Static head D) Friction head

Slip of reciprocating pump becomes negative when

A) Theoretical discharge is more than actual discharge
B) Pump is running at low speed

C) Theoretical discharge is equal to actual discharge
D) Actual discharge is more than theoretical discharge

In a centrifugal pump the liquid enters the pump
A) at the centre B) at the top
C) at the bottom D) from sides

Indicator diagram of a reciprocating pump is a graph between
A) Flow vs Swept Volume

B) Flow vs Speed

C) Pressure vs Speed

D) Pressure in cylinder vs Stroke Length