4

P/ √H

P/ H

P/ H3/2

P/ H²

C. P/ H3/2

4

Volute casing

Vortex casing

Any one of these

4

Axially, axially

4

2 to 4

4 to 8

8 to 16

16 to 24

4

4

10 r.p.m.

20 r.p.m.

40 r.p.m.

80 r.p.m.

4

# The flow rate in gear pump

Increases with increase in pressure

Decreases with increase in pressure

More or less remains constant with increase in pressure

Unpredictable

4

waV/2g × sinθ

waV/g × sinθ

waV²/2g × sin2θ

waV²/g × sinθ

4

Two

Four

Six

Eight

4

Axial

Centrifugal

Vortex

4

# A hydraulic ram is a device used to

Store the energy of water

Increase the pressure of water

To lift water from deep wells

To lift small quantity of water to a greater height when a large quantity of water is available at a smaller height

4

# The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Delivers unit discharge under unit head

Delivers unit discharge under unit speed

Develops unit power under unit head

Develops unit power under unit speed

4

# In a reaction turbine, the draft tube is used

To run the turbine full

To prevent air to enter the turbine

To increase the head of water by an amount equal to the height of the runner outlet above the tail race

To transport water to downstream

4

# Low specific speed of turbine implies it is

Propeller turbine

Francis turbine

Impulse turbine

Any one of the above

4

Absolute velocity

Flow

4

2 to 4

4 to 8

8 to 16

16 to 24

4

Q/√H

Q/H

Q/H3/2

Q/H²

4

# Axial flow pump is started with its delivery valve

Kept fully closed

Kept fully open

Irrespective of any position

Kept 50% open

4

# Which of the following pump is suitable for small discharge and high heads?

Centrifugal pump

Axial flow pump

Mixed flow pump

Reciprocating pump

4

(N√Q)/H2/3

(N√Q)/H3/4

(N√Q)/H

(N√Q)/H5/4

4

# The discharge through a turbine is

Directly proportional to H1/2

Inversely proportional to H1/2

Directly proportional to H3/2

Inversely proportional to H3/2

4

# Pressure intensifier increases the pressure in proportion to

Ratio of diameters

Square of ratio of diameters

Inverse ratio of diameters

Square of inverse ratio of diameters

4

# Multistage centrifugal pumps are used to obtain

High discharge

Pumping of viscous fluids

4

# The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Manometric efficiency

Mechanical efficiency

Overall efficiency

Volumetric efficiency

4

Pelton wheel

Kaplan turbine

Francis turbine

None of these

4

# The working of which of the following hydraulic units is based on Pascal's law?

Air lift pump

Jet pump

Hydraulic coupling

Hydraulic press

4

39.2 %

48.8 %

84.8 %

88.4 %

4

# Indicator diagram of a reciprocating pump is a graph between

Flow vs. swept volume

Pressure in cylinder vs. swept volume

Flow vs. speed

Pressure vs. speed

4

# A hydraulic coupling belongs to the category of

Power absorbing machines

Power developing machines

Energy transfer machines

Energy generating machines

4

# Which of the following statement is correct as regard to water wheels?

They have slow speeds

They are suitable even for low water heads

They give constant efficiency, even if the discharge is not constant

All of the above