Hydraulics and Hydraulic Machines MCQs (Part-6)

What is the primary advantage of a reciprocating pump?

A Low energy consumption
B High pressure capability
C High flow rates
D Continuous flow

In an open channel, what does the “flow depth” refer to?

A Water pressure
B Water velocity
C Water temperature
D Distance between bottom and water surface

What is the main purpose of a hydraulic accumulator?

A Increase flow rate
B Measure fluid pressure
C Store fluid energy
D Control flow direction

Which of the following is a characteristic of a centrifugal pump?

A No moving parts
B Variable flow
C High‐pressure generation
D Positive displacement

What is the role of a jet nozzle in an impulse turbine?

A To direct fluid to the blades
B To store energy
C To regulate flow
D To increase pressure

Which of the following is a common effect of cavitation in pumps?

A Reduced flow rate
B Vibrations and noise
C Higher pressure
D Increased efficiency

In a Kaplan turbine, what controls the power output?

A Pumping speed
B Water flow direction
C Blade angle
D Water temperature

What is the primary purpose of a control valve in a hydraulic system?

A To increase fluid pressure
B To measure fluid velocity
C To store energy
D To regulate flow rate

What happens to the fluid in a reaction turbine?

A It changes direction multiple times
B Its pressure energy is converted to kinetic energy
C It loses velocity
D It passes through a nozzle

What is “specific speed” in the context of hydraulic turbines?

A The speed of the turbine blade tips
B A measure of turbine efficiency
C A measure of water velocity
D A dimensionless number used for turbine selection

What type of flow occurs in a well‐designed spillway?

A Compressible flow
B Turbulent flow
C Viscous flow
D Laminar flow

What is the primary purpose of a velocity diagram in a turbine?

A To visualize the flow of water through the turbine
B To calculate turbine efficiency
C To determine water pressure
D To regulate flow rate

What is the primary function of a hydraulic gate in a dam?

A Generate electricity
B Store water
C Measure water pressure
D Regulate flow and water levels

What happens during a hydraulic jump in an open channel?

A Energy is added to the system
B Water speed increases
C Water flow transitions from high to low velocity
D Water depth decreases

In a jet propulsion system, what primarily generates thrust?

A Velocity of fluid exiting the nozzle
B Fluid density
C Fluid temperature
D Fluid pressure