Hydraulics and Hydraulic Machines MCQs (Part-8)

What is the main purpose of a centrifugal pump impeller?

A Increase pressure
B Convert mechanical energy to fluid energy
C Increase velocity
D Direct water flow

What is the primary function of a jet pump?

A Increase water flow rate
B Store hydraulic energy
C Reduce water velocity
D Lift water using pressure difference

What is the primary advantage of using a Kaplan turbine?

A Adjustable blades for variable flow conditions
B High head, low flow capacity
C Fixed blades for efficient operation
D Low efficiency under varying conditions

In a reaction turbine, what happens to water as it passes through the turbine blades?

A Water velocity decreases, pressure increases
B Water pressure remains constant
C Water velocity increases, pressure decreases
D Water velocity and pressure both decrease

What does a surge tank prevent in a hydraulic system?

A Sudden temperature rise
B Pressure fluctuations or water hammer
C Fluid contamination
D Excessive fluid velocity

What is the role of a hydraulic gate in a canal?

A Store water
B Generate power
C Regulate water flow and levels
D Reduce water velocity

How does water hammer affect pipes in a hydraulic system?

A Increases water velocity
B Reduces fluid flow rate
C Maintains steady pressure
D Creates pressure surges that damage pipes

What type of energy is primarily utilized in a Pelton wheel turbine?

A Kinetic energy of water
B Thermal energy
C Gravitational energy
D Potential energy of water

What does “head loss” refer to in a hydraulic system?

A Decrease in water flow rate
B Loss of energy due to friction or turbulence
C Increase in water velocity
D Reduction in water pressure

In which type of turbine is water directed tangentially to the blades?

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

How is cavitation prevented in hydraulic pumps?

A By reducing the fluid velocity
B By increasing pump speed
C By ensuring sufficient suction pressure
D By using larger pipes

What is the function of a velocity diagram in a turbine?

A To analyze fluid velocities and energy transfer
B To visualize flow direction
C To determine pressure variations
D To calculate power output

What is the main advantage of using a fluid coupling in a mechanical system?

A Increase efficiency
B Reduce power consumption
C Increase turbine speed
D Smooth power transmission

What happens during a hydraulic jump in an open channel?

A Water depth decreases
B Water velocity increases
C Water velocity decreases and depth increases
D Energy is added to the system

What happens during a hydraulic jump in an open channel?

A Energy is added to the system
B Water velocity decreases and depth increases
C Water depth decreases
D Water velocity increases