Quiz ( Pumps )

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1. What is the primary function of a pump?

• a) To increase the pressure of a fluid
• b) To decrease the pressure of a fluid
• c) To change the state of a fluid
• d) To measure the flow rate of a fluid

2. Which type of pump is known for its high flow rate but relatively low pressure?

• a) Centrifugal pump
• b) Positive displacement pump
• c) Rotary pump
• d) Jet pump

3. Cavitation in a pump is caused by:

• a) Excessive fluid viscosity
• b) Insufficient NPSH (Net Positive Suction Head)
• c) Overloading the pump
• d) Excessive impeller speed

4. The efficiency of a pump is defined as the ratio of:

• a) Output power to input power
• b) Output pressure to input pressure
• c) Output flow rate to input flow rate
• d) Output head to input head

5. Which of the following is a positive displacement pump?

• a) Centrifugal pump
• b) Axial flow pump
• c) Reciprocating pump
• d) Turbine pump Answer

6. The specific speed of a pump is a dimensionless parameter that relates:

• a) Flow rate, head, and speed
• b) Pressure, temperature, and viscosity
• c) Power, efficiency, and cavitation
• d) NPSH, cavitation, and speed

7. What is the purpose of an impeller in a centrifugal pump?

• a) To create a vacuum
• b) To increase fluid pressure
• c) To convert rotational energy into fluid energy
• d) To regulate flow rate

8. Which of the following is NOT a common type of pump?

• a) Gear pump
• b) Screw pump
• c) Vortex pump
• d) Piston pump

9. The NPSH available (NPSHa) should always be:

• a) Equal to NPSH required (NPSHr)
• b) Greater than NPSH required (NPSHr)
• c) Less than NPSH required (NPSHr)
• d) Independent of NPSH required (NPSHr)