Chapter 22 Types of Pumps

Question 1

Wear rings for a centrifugal pump can be installed on the:

a) Stuffing Box
b) Pump Shaft
c) Pump casing or shaft or both
d) Impeller or casing or both

Answer 1

d) Impeller or casing or both

Question 2

A prime purpose of having a pump is to:

a) Create a pressure differential only
b) Develop a static suction pressure
c) Raise a fluid from a lower level to a higher level
d) Transfer a fluid from one place to another

Answer 2

d) Transfer a fluid from one place to another

Question 3

Two classifications of pumps are:

a) Rotary and external gear
b) Reciprocating and plunger
c) Dynamic and positive displacement
d) Volute and diffuser

Answer 3

c) Dynamic and positive displacement

Question 4

A sliding vane pump fits into the category:

a) Dynamic mixed flow
b) Positive displacement rotary
c) Dynamic centrifugal volute
d) Positive displacement lobe

Answer 4

b) Positive displacement rotary

Question 5

The vertical linear distance measured from the centreline of the pump down to the surface of the liquid on the suction side of the pump is termed:

a) Static suction head
b) Total static suction
c) Dynamic suction lift
d) Static suction lift

Answer 5

d) Static suction lift

Question 6

Centrifugal pumps must be placed close to or below the surface of the liquid being pumped because:

a) Of their inability to produce high lift
b) It makes them less apt to lose their prime
c) It makes them easier to prime
d) It decrease the chance of “surging”.

Answer 6

a) Of their inability to produce high lift

Question 7

A device used in a centrifugal pump to make the conversion from kinetic energy (velocity) to potential energy (pressure) more effective is the:

a) Impeller
b) Volute
c) Wear ring
d) Diffuser

Answer 7

d) Diffuser