Aux 1 Unit 5 Q2

1 / 10

What typically happens to the fluid when a relief valve opens in a positive displacement pump system?

B) It is discharged into the atmosphere

C) It is cooled and then reintroduced to the system

D) It is mixed with another fluid stream

A) It is recirculated back to the pump’s suction side or to a reservoir

2 / 10

When is a pulsation damper typically fitted to the delivery line of a positive displacement pump?

A) When the system requires a constant flow rate without pressure fluctuations

D) When the system requires high-pressure pulsations

B) When the pump operates at a very low pressure

C) When the fluid being pumped is highly viscous

3 / 10

Why might a system with multiple positive displacement pumps in parallel require a pulsation damper?

B) To synchronize the operation of the pumps

A) To reduce noise in the system

C) To smooth out combined pressure fluctuations and maintain a steady flow

D) To increase the total flow rate

4 / 10

How does a pulsation damper reduce pressure fluctuations in a positive displacement pump system?

D) By reducing the pump’s output pressure

B) By absorbing pressure spikes using a gas-filled bladder or flexible diaphragm

A) By increasing the fluid temperature

C) By speeding up the flow of fluid through the pump

5 / 10

What could happen if a positive displacement pump operates without a relief valve and the discharge line becomes blocked?

A) The pump would automatically shut down

B) Pressure would continue to build, potentially leading to pump or system failure

D) The fluid would automatically be diverted to the suction side

C) The pump would decrease its speed to compensate

6 / 10

Where is the relief valve typically fitted in a positive displacement pump system?

A) On the suction side of the pump

C) Directly on the pump casing

B) On the delivery (discharge) side of the pump

D) At the inlet of the fluid reservoir

7 / 10

What is a key component inside a pulsation damper that helps it function?

D) A heating element

B) A gas-filled bladder or flexible diaphragm

C) A mechanical impeller

A) A high-pressure relief valve

8 / 10

Why is a relief valve necessary in a positive displacement pump system?

D) To regulate the temperature of the fluid being pumped

A) To increase the pump's efficiency

C) To decrease the flow rate of the pump

B) To prevent excessive pressure buildup that could damage the pump and system

9 / 10

In which type of positive displacement pump system is a pulsation damper most likely to be used?

C) In a screw pump system with low-pressure variations

B) In a reciprocating pump system with significant pressure pulsations

D) In a centrifugal pump system with stable pressure

A) In a gear pump system with smooth, continuous flow

10 / 10

What is the primary function of a relief valve in the delivery line of a positive displacement pump?

B) To protect the pump and system from overpressure conditions

A) To maintain constant pressure in the suction line

C) To reduce the temperature of the fluid being pumped

D) To enhance the flow rate through the pump

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