centrifugal pump is a mcq|centrifugal pump problems and answers

produce a small drop in pressure. In control terms this means that control would be very 'sloppy'. Discharge throttling on the other hand, allows the pump to develop the head that 'suits' it. . 20 40 80 60 100 P pm MOD PUMP 100 RECYCLE FLOW 80 Q1 120 Fig. 1-4. Modified Curves: Recycle Valve. Controlling Centrifugal Pumps www.driedger.ca CE1 .

A centrifugal pump is a vital piece of equipment used in various industries to move fluids from one place to another. It works on the principle of converting mechanical energy into hydraulic energy through centrifugal force. Understanding the key components and functioning of a centrifugal pump is essential for efficient operation. Let's delve into some multiple-choice questions (MCQs) related to centrifugal pumps to test your knowledge.

A centrifugal pump converts mechanical energy into hydraulic energy using centrifugal force. Key components include: 1. **Impeller**: A rotating part that imparts kinetic energy to the fluid.

Centrifugal Pump Problems and Answers

1. **Question**: What is the main function of the impeller in a centrifugal pump?

- A) To regulate the flow rate

- B) To convert mechanical energy into hydraulic energy

- C) To control the pressure

- D) To filter the fluid

- **Answer**: B) To convert mechanical energy into hydraulic energy

2. **Question**: Which of the following is not a common problem encountered in centrifugal pumps?

- A) Cavitation

- B) Overloading

- C) Corrosion

- D) Undercooling

- **Answer**: D) Undercooling

Centrifugal Pump Head Problems

3. **Question**: What does the term "head" refer to in a centrifugal pump?

- A) The speed of the impeller

- B) The pressure at the pump outlet

- C) The power consumption of the pump

- D) The height to which the pump can raise a fluid

- **Answer**: D) The height to which the pump can raise a fluid

4. **Question**: Which factor does not affect the total head developed by a centrifugal pump?

- A) Pump speed

- B) Fluid density

- C) Impeller diameter

- D) Pipe length

- **Answer**: D) Pipe length

Centrifugal Pump Questions and Answers

5. **Question**: What is the purpose of a volute casing in a centrifugal pump?

- A) To increase the pump efficiency

- B) To reduce cavitation

- C) To collect the fluid from the impeller and convert velocity energy into pressure energy

- D) To control the flow rate

- **Answer**: C) To collect the fluid from the impeller and convert velocity energy into pressure energy

6. **Question**: Which type of curve represents the performance of a centrifugal pump?

- A) Efficiency curve

- B) Power curve

- C) Head-capacity curve

- D) NPSH curve

- **Answer**: C) Head-capacity curve

Centrifugal Pump Objective Questions

7. **Question**: What is the significance of specific speed in centrifugal pumps?

- A) It indicates the pump's efficiency

- B) It determines the pump size

- C) It represents the pump's operating speed

- D) It is used to calculate the pump's head

- **Answer**: B) It determines the pump size

8. **Question**: Which of the following is not a type of centrifugal pump based on the number of impellers?

- A) Single-stage pump

- B) Multi-stage pump

- C) Double-suction pump

- D) Axial-flow pump

Explanation: Centrifugal pumps are used to transport fluids. They transport fluids by conversion of energies. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery.

A. Understanding the Basic Formula: The flow rate (Q) of a centrifugal pump can be calculated using the formula: Q = (π * D^2 * n * H) / (4 * g), where D represents the impeller diameter, n represents the pump speed (RPM), H represents the head, and g represents the acceleration due to gravity.

centrifugal pump is a mcq|centrifugal pump problems and answers