Hydraulics and Hydraulic Machines MCQs (Part-4)

What is the primary function of a hydraulic pump?

A Store hydraulic energy
B Control fluid pressure
C Convert electrical energy to mechanical energy
D Convert mechanical energy to hydraulic energy

Which type of pump requires priming before operation?

A Centrifugal pump
B Gear pump
C Reciprocating pump
D Jet pump

What does a hydraulic intensifier do?

A Increases fluid velocity
B Decreases turbulence
C Increases fluid pressure
D Reduces flow rate

What is the function of guide vanes in a Francis turbine?

A Control water flow direction
B Convert kinetic energy to pressure energy
C Increase turbine speed
D Store energy

What happens to pressure energy in a reaction turbine?

A Remains constant
B Converts into kinetic energy
C Increases velocity
D Converts into heat energy

What is the purpose of an air vessel in a reciprocating pump?

A Increase pump speed
B Store excess water
C Prevent water hammer
D Reduce flow fluctuations

Which factor influences cavitation in a pump the most?

A Low pressure
B High velocity
C High flow rate
D Large pipe diameter

What is the function of a penstock in a hydropower plant?

A Store water
B Increase turbine speed
C Control water flow to turbines
D Measure flow rate

What type of turbine is used in tidal power plants?

A Kaplan turbine
B Bulb turbine
C Francis turbine
D Pelton wheel

What is the main cause of water hammer?

A Sudden valve closure
B High flow rate
C Pipe leakage
D Increased temperature

What happens in a hydraulic jump?

A Energy is stored
B Velocity decreases, depth increases
C Pressure drops suddenly
D Flow becomes laminar

What does “Net Positive Suction Head (NPSH)” indicate in a pump?

A Maximum suction lift
B Pump efficiency
C Available pressure to avoid cavitation
D Maximum discharge

In which hydraulic system is a “fluid coupling” used?

A Power transmission
B Flow control
C Water storage
D Pressure measurement

What does the term “hydraulic gradient” refer to?

A Water depth in a canal
B Slope of a water surface
C Pressure drop in a pipe
D Velocity of fluid

What is the purpose of “governing” in a Kaplan turbine?

A Control blade angle
B Increase flow rate
C Store hydraulic energy
D Reduce power output