Hello readers! Here, I will discuss all the pumps through some MCQ Questions and Short questions. When you read the questions and answers in place of a long text, you feel relaxed and the information is stored in your mind for a long time. Isn’t it? I am giving you a lot of MCQ Questions on Pumps and also there will be a quiz on pumps.
Pumps are used to deliver the fluid from one place to another by creating a head. Basically, mechanical energy is converted into hydraulic energy. In the case of a Centrifugal pump, hydraulic energy remains in the form of pressure energy. Mechanical energy is converted into pressure energy with the help of centrifugal force created in the impeller.
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Let’s start the MCQ questions without further delay.
Multiple-Choice Questions or MCQ on Pumps
- Which of the following is correct in a centrifugal pump?
- Q α D2
- Q α 1/D2
- Q α D3
- Q α 1/ D3
Ans: (2)
- In a multistage centrifugal pump, the number of impellers is:
- 1
- 2 or more
- 0
- None of these
Ans: (2)
- For getting higher flow at the outlet of the centrifugal pump, impellers should be connected in
- Series
- Parallel
- Anyone
- Can’t say
Ans: (2)
- For getting higher pressure at the outlet of the centrifugal pump, impellers should be connected in
- Series
- Parallel
- Anyone
- Can’t say
Ans: (1)
- Centrifugal pumps are normally of
- High capacity and low head
- Low capacity and high head
- High capacity and high head
- Low capacity and low head
Ans: (1)
- Positive displacement pumps are of
- High capacity and low head
- Low capacity and high head
- High capacity and high head
- Low capacity and low head
Ans: (2)
- Centrifugal pumps are not suitable for:
- Low viscosity fluids
- High viscosity fluids
- Can’t say
Ans: (2)
- The efficiency of a centrifugal pump
- Decreases with an increase in viscosity
- Increases with increase in viscosity
- Does not vary with the change in viscosity
- Can’t say
Ans: (1)
The efficiency of a positive displacement pump
- Decreases with an increase in viscosity
- Increases with increase in viscosity
- Does not vary with the change in viscosity
- Can’t say
Ans: (2)
- Centrifugal pumps require:
- Creating a vacuum on the suction side before starting the pump
- Creating a vacuum on the discharge side before starting the pump
- Priming before starting the pump
- None of the above
Ans: (3)
- Which pumps are called self-primed pumps?
- Positive displacement pump
- Centrifugal pump
- Both (1) and (2)
- Can’t say
Ans: (1)
- In which pump, flow is constant?
- Positive displacement pump
- Centrifugal pump
- Both (1) and (2)
- Can’t say
Ans: (2)
- In which pump, flow is pulsating?
- Positive displacement pump
- Centrifugal pump
- Both (1) and (2)
- Can’t say
Ans: (1)
- Which of the following is correct as per pump affinity law?
- P α N2
- P α N-2
- P α N3
- P α N-3
Ans: (3)
- Which of the following is correct as per pump affinity law?
- H α N2
- H α N-2
- H α N3
- H α N-3
Ans: (1)
- The indicator diagram of a centrifugal pump is a
- The graph between the pressure in the cylinder and temperature
- The graph between swept volume and speed
- The graph between swept volume and temperature
- The graph between the pressure in the cylinder and swept volume
Ans: (4)
- In a centrifugal pump, liquid enters the pump through
- The center
- The top
- The bottom
- Can’t say
Ans: (1)
- When the flow is less but you want high pressure, which pump will you choose?
- Axial flow pump
- Centrifugal Pump
- Reciprocating Pump
- None of these
Ans: (3)
- The specific speed of a centrifugal pump can be calculated from the:
- (N*Q)/(H^0.75)
- (N*Q^0.5)/(H)
- (N*Q^0.0.75)/(H^0.5)
- (N*Q^0.5)/(H^0.75)
Ans: (4)
- Which of the following pump has the highest specific speed?
- Centrifugal pump
- Mixed flow pump
- Axial flow pump
- None of these
Ans: (3)
- Which are the parts of a centrifugal pump?
- Casing
- Suction pipe
- Impeller
- All of the above
Ans: (4)
- Coupling shall be designed with a safety factor _ times the shaft safety factor.
- 1
- 1.5
- 2
- 2.5
Ans: (2)
- Normally for how long a hydrostatic test of a centrifugal pump should be conducted?
- 5 minutes
- 10 minutes
- 15 minutes
- 30 minutes
Ans (4)
- What is the relation between the test pressure and the pump shut-off pressure?
- Test pressure = shut off pressure
- Test pressure =2x shut-off pressure
- Test pressure = 1.5x shut-off pressure
- All of the above
- None of these.
Ans: (3)
- Priming is the process by which
- The suction pipe, delivery pipe, up to the delivery valve is filled with liquid after starting the motor from an outside source
- The suction pipe, delivery pipe, up to the delivery valve is filled with liquid before starting the motor.
- Only the suction pipe is filled with liquid before starting the motor from an outside source.
- Only the delivery pipe, up to the delivery valve, is filled with liquid before starting the motor from an outside source
Ans: (2)
- Priming in the pump is required:
- To remove the air from the pump
- To avoid the generation of negative pressure
- Both (1) and (2)
- None of these
Ans: (3)
Conclusion
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