Aux 1 Unit 5 Q1

1 / 10

Why do some positive displacement pumps, such as gear pumps, typically not require pulsation dampers?

B) They generate a smooth, continuous flow with minimal pulsation

A) They operate at lower pressures

D) They operate at very high speeds

C) They are designed to handle only non-pressurized fluids

2 / 10

What is the primary function of a pulsation damper in a positive displacement pump system?

B) To smooth out pressure fluctuations and reduce pulsations in the discharge line

D) To control the temperature of the fluid being pumped

A) To increase the flow rate of the pump

C) To prevent backflow in the system

3 / 10

What is the reason that screw pumps typically do not need pulsation dampers?

A) They operate at low flow rates

C) They can handle high-viscosity fluids without pulsation

B) Their rotary motion delivers a smooth, non-pulsating flow

D) They are only used in closed-loop systems

4 / 10

Which component in a pulsation damper is responsible for isolating the gas from the liquid being pumped?

A) The valve seat

D) The impeller

B) The diaphragm

C) The pump casing

5 / 10

In which situation might even a positive displacement pump that usually generates low pulsation require a pulsation damper?

B) When used in a high-pressure system where even small pulsations could cause issues

C) When the pump is used in an open-loop system

A) When operating with highly viscous fluids

D) When the fluid temperature is very low

6 / 10

How does a pulsation damper typically reduce pulsations in a positive displacement pump system?

B) By increasing the speed of the pump

D) By cooling the fluid as it passes through the pump

C) By filtering out debris from the fluid

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

7 / 10

Why is it important for a pulsation damper to be correctly sized for the pump system?

A) To ensure the pump operates at its maximum capacity

B) To absorb the correct amount of pressure fluctuation and maintain stable flow

C) To increase the speed of the pump

D) To reduce the maintenance needs of the pump

8 / 10

Which characteristic of peristaltic pumps allows them to operate without a pulsation damper?

B) The gentle, squeezing action that provides a steady flow with minimal pulsation

C) Their use of a dual-piston design

D) The fact that they are manually operated

A) Their ability to pump at extremely high pressures

9 / 10

What could happen if a positive displacement pump system lacks a pulsation damper when one is needed?

D) The fluid being pumped will become more uniform

B) Excessive pressure fluctuations could lead to pipe vibration, noise, and potential damage

C) The system will automatically adjust to the pulsations

A) The pump will operate more efficiently

10 / 10

In a pulsation damper, what happens to the gas-filled bladder when a pressure spike occurs?

B) The bladder contracts, increasing the pressure in the line

D) The bladder remains unchanged

A) The bladder expands, absorbing the excess pressure

C) The bladder releases gas to reduce pressure

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