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Hydraulic Machines
Hydraulic Machines Multiple Choice
Quiz 1
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Q.1
The mechanical energy can be measured by ______
a) Adiabatic expansion
b) Isentropic compression
c) Adiabatic compression
d) Isentropic expansion
Q.2
How many impellers does a multistage centrifugal pump have?
a) Zero
b) One
c) Exactly two
d) Two and more
Q.3
The energy usage in pumping installation is determined by _______
a) Friction characteristics
b) Pipe diameter
c) Surface tension
d) Thermal expansion
Q.4
Which among the following is a friction factor?
a) Newtons factor
b) Darcy’s factor
c) Transfer temperature
d) Heizenberg’s factor
Q.5
What is the dimension for Darcy’s friction factor?
a) kg/m
b) N/mm
c) kg
d) Dimensionless
Q.6
Formation of bubbles in an impeller is called ______
a) Cavities
b) Defects
c) Friction
d) Heat burn
Q.7
Centrifugal pump works by imparting _______
a) Potential energy
b) Kinetic energy
c) Heat energy
d) Electrical energy
Q.8
What is the full form of NPSH in a pump?
a) Net pressure suction head
b) Net positive suction head
c) Non-pressure suction head
d) Net pressure super head
Q.9
When the NPSH is low, it leads to ________
a) Breaking
b) Wear
c) Corrosion
d) Cavitation
Q.10
Wear of impeller can be worsened by __________
a) Draft tube
b) Pump pressure
c) Suspended solenoids
d) Turbine head
Q.11
Which pump is the most efficient centrifugal pump?
a) Electrical pump
b) Reciprocating pump
c) Heat pump
d) Pressure pump
Q.12
Corrosion in the pump is developed due to _______
a) Pressure of air
b) Fluid properties
c) Draft tube
d) Tank dimensions
Q.13
Over heating is a major problem faced in a pump.
a) True
b) False
Q.14
What is the effect of cavitation in boat propeller?
a) It recirculates air
b) The pressurizes the air
c) It leads to fast spinning
d) It breaks the bubbles
Q.15
Lack of prime is a problem faced in centrifugal pump.
a) True
b) False
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