Module B

Question 1

Which reciprocating pump can be allowed to run dry?

Answer 1

Diaphragm pump

Question 2

Rotary pumps produce a ____________ than reciprocating pumps

Answer 2

Smoother flow

Question 3

Which vane pump uses an oval rotor?

Answer 3

External Vane pump

Question 4

Variable discharge rotary pumps may be _________ and _________

Answer 4

Vanes and pistons

Question 5

What type of housing does a balanced vane pump use?

Answer 5

An elliptical housing

Question 6

A duplex pump has two __________ and two __________

Answer 6

cylinders and plungers

Question 7

Plunger pumps can have fixed or adjustable ________

Answer 7

strokes

Question 8

What are three properties of hydraulically-activated diaphragm pumps?

Answer 8

1. Can handle high pressures
2. have high-pressure stiffness
3. have high-metering precision

Question 9

______________ is the type of activation most likely to be used on a double-acting diaphragm pump.

Answer 9

pneumatically-activated

Question 10

Why is each stroke on a multiplex plunger pump different?

Answer 10

To even out delivery and pulsations

Question 11

Which pump is least likely to be used for handling food products?

Answer 11

An external vane pump

Question 12

A flexible tube pump is an example of a _______________ pump

Answer 12

Peristaltic

Question 13

_________________is an example of a peristaltic pump

Answer 13

A flexible tube pump

Question 14

A ________ vane pump does not need a relief valve.

Answer 14

flexible

Question 15

Which type of rotary pump best tolerates abrasives?

Answer 15

single rotor screw pump

Question 16

The rotors of multi-rotor screw pumps have thread that _______

Answer 16

Are not all the same hand. They need to mesh and creat flow as the rotos turn.

Question 17

An external circumferential piston pump requires _________ gears.

Answer 17

timing

Question 18

A flexible liner pump has a divider between the ________ and _______ ports.

Answer 18

discharge and inlet

Question 19

Which type of screw pump has a peristaltic action?

Answer 19

single rotor

Question 20

A ________ check valve would not be suitable for high pressures.

Answer 20

flap

Question 21

A ________ check valve would be the least suitable for liquids containing solids.

Answer 21

Wing guided disc

Question 22

What happens to the product when a relief valve on a rotary pump opens?

Answer 22

It is returned to suction

Question 23

What are the three types of relief valves?

Answer 23

Balls, poppets and discs

Question 24

Are foot valves necessary when handling viscous liquids?

Answer 24

No, they cause too much restriction

Question 25

Which gas should be used in pre-charging a diaphragm-type pulsation dampener for unspecified use in an oil refinery?

Answer 25

Nitrogen