Centrifugal Pumps Quiz

What is the main function of a centrifugal pump?

• To increase the pressure of the liquid

• To filter the liquid

• To decrease the pressure of the liquid

• To maintain the temperature of the liquid

Which component of a centrifugal pump is responsible for transferring kinetic energy?

• Casing

• Impeller

• Inlet

• Discharge pipe

What type of impeller has vanes free on both sides?

• Closed impeller

• Semi-open impeller

• Open impeller

• Multi-stage impeller

What does the volute in a centrifugal pump do?

• Increases the speed of the liquid

• Converts kinetic energy into pressure

• Collects the liquid around the impeller

• Acts as a pressure containment vessel

What is the purpose of the whirlpool chamber in a centrifugal pump?

• To increase the speed of the impeller

• To collect the liquid

• To reduce turbulence

• To increase the pressure of the liquid

What is the typical use of a closed impeller?

• Used in medium diameter pumps

• Handling suspended solids

• Used in small diameter pumps

• Used in large pumps with high efficiencies

What is the term for the pressure head increase across the pump?

• Dynamic head

• Static head

• Total head

• Manometric head

What is the formula for calculating the hydraulic power received by the water from the impeller?

• P_hyd = ρQH_euler

• P_hyd = ρgQH_total

• P_hyd = ρQw_2u_2

• P_hyd = ρgQH_static

What does the term 'Euler head' refer to?

• The efficiency of the pump

• The total head added to the water

• The power per unit of weight flow rate

• The pressure head increase

What is the overall efficiency of a pump defined as?

• Mechanical power per weight flow rate

• Total head increase divided by Euler head

• Power transferred to the liquid divided by power input to the pump

• Power input to the pump divided by power transferred to the liquid