Aux 1 Unit 5 Q2

1 / 10

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

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

B) It is discharged into the atmosphere

2 / 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

3 / 10

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

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

D) In a centrifugal pump system with stable pressure

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

B) In a reciprocating pump system with significant pressure pulsations

4 / 10

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

D) To regulate the temperature of the fluid being pumped

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

C) To decrease the flow rate of the pump

A) To increase the pump's efficiency

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

C) The pump would decrease its speed to compensate

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

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

6 / 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

D) To enhance the flow rate through the pump

C) To reduce the temperature of the fluid being pumped

7 / 10

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

C) When the fluid being pumped is highly viscous

D) When the system requires high-pressure pulsations

B) When the pump operates at a very low pressure

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

8 / 10

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

D) To increase the total flow rate

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

B) To synchronize the operation of the pumps

A) To reduce noise in the system

9 / 10

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

A) A high-pressure relief valve

C) A mechanical impeller

D) A heating element

B) A gas-filled bladder or flexible diaphragm

10 / 10

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

A) By increasing the fluid temperature

D) By reducing the pump’s output pressure

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

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

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