Pumps

Question 1

Balance holes are drilled through?

Answer 1

The rear shroud on the inside of the wear ring

Question 2

The paddlewheel impeller is also called a?

Answer 2

High-speed impeller

Question 3

Inducers have what type of flow?

Answer 3

Axial-flow

Question 4

Front wear rings minimize?

Answer 4

Suction recirculation

Question 5

Pumps are primed by bleeding off gas or air through the?

Answer 5

Air vent

Question 6

When blinding piping prior to pump removal, blinds should be placed?

Answer 6

Downstream of the suction valve and upstream of the discharge valve

Question 7

The impeller converts mechanical energy into?

Answer 7

Hydraulic energy

Kinetic energy

Question 8

The head produced by a pump varies?

Answer 8

With the square of the impeller diameter

Question 9

N-
P-
S-
H-

Answer 9

Net
Positive
Suction
Head

Question 10

As pressure on a liquid rises it’s boiling point?________________

Answer 10

Rises-

It increases 3 degrees for every psi

Question 11

Bearings in a double suction pump are mainly for?

Answer 11

Radial loads

Question 12

Axial flow pumps usually operate under conditions of?

Answer 12

Low head and high volume

Question 13

Diffusers in a pump-

Answer 13

• slow the velocity of the liquid and increase its pressure.
• help balance radial bearing loads.
• can be incorporated in volume casings.

Question 14

Regenerative type pumps are best suited where ___________ capacities and ___________ heads are required.

Answer 14

• low capacity

- high head

Question 15

Velocity of fluid flow within the centrifugal pump is greatest near the?

Answer 15

Tips of the impellers

Question 16

Concerning a multistage centrifugal pump the pressure increases at each

Answer 16

Stage

Question 17

Which vane pump uses an oval rotor?

Answer 17

External vane pump

Question 18

On a vertical plunger pump, the plunger is attached to the?

Answer 18

Yoke

Question 19

A PTFE sandwich refers to?

Answer 19

An arrangement to prevent product escape

Question 20

Which type of screw has a peristaltic action?

Answer 20

Single rotor

Question 21

Which type of pump has a divider between the discharge and inlet ports?

Answer 21

Flexible liner pump

Question 22

Which type of rotary pump best tolerates abrasives?

Answer 22

Single rotor screw pump

Question 23

The pump least likely to be used for handling food products would be?

Answer 23

An external vane pump

Question 24

Which pump has a cam inserted between the discharge and inlet ports?

Answer 24

Flexible vane pump

Question 25

Which type of impeller has the lowest specific speed?

Answer 25

Radial-flow

Question 26

Which type of impeller will handle the highest flows?

Answer 26

Axial-flow