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Question 1

The two units of measuring liquid pressure are

Answer 1

Psi and ft of head

Question 2

The available NPSH of a system should be____ the required NPSH of the pump.

Answer 2

Equal to or greater than

Question 3

The formation of vapor pockets, or bubbles, within a liquid is called

Answer 3

Cavitation

Question 4

The horsepower required to actually drive a fluid-handing pump is called the ___ hp

Answer 4

Brake

Question 5

One electrical horsepower equals ___ watts

Answer 5

746

Question 6

The area that surrounds and houses the packing in a pump is called the

Answer 6

Stuffing box

Question 7

When installing four or more packing rings, you should stagger the joints ____ degrees apart

Answer 7

90

Question 8

The most common mechanical seal configuration is the ____ seal

Answer 8

Single internal

Question 9

In some mechanical seals, the rotating element is secured to the shaft by a

Answer 9

Boot

Question 10

The major cause of bured seals is

Answer 10

Improper lubrication

Question 11

After grouting a baseplate, you should allow the grouting mixture to set for at least

Answer 11

48hr

Question 12

When removing springs from pump feet, you should measure movement with a

Answer 12

Dial indicator

Question 13

Unwanted movement of a pump shaft along its axis is called

Answer 13

Endplay

Question 14

Cavitation is caused by

Answer 14

Pressure loss

Question 15

Loss of clearance between wearing rings is called

Answer 15

Ring seizure

Question 16

On a pump that has both bearings on the same side of the impeller, the bearing nearest the impeller is called the ___
bearing

Answer 16

Inboard

Question 17

The most common sign of cavitation in a pump impeller is

Answer 17

Pitting on the back sides of the vanes

Question 18

In general, runout on a shaft should not exceed ____ inches

Answer 18

0.003

Question 19

Too much clearance befween the stationary rings and the impeller or rotating nings of a centrifugal pump wil cause

Answer 19

Fluid leakage

Question 20

When installing a new gasket, you may wish to apply ___ to the lower half of the casing

Answer 20

Shellac

Question 21

The most commonly used type of all rotary pumps is the ___ pump

Answer 21

External gear

Question 22

In a vane-type rotary pump, what keeps the sliding vanes in contact with the pump housing?

Answer 22

Centrifugal force

Question 23

The riser used to vent a system at the discharge side of the pump should be about ___ times as long as the diameter of the pipe.

Answer 23

5

Question 24

Internal bearings on rotary pumps are most often lubricated by

Answer 24

The fluid being pumped

Question 25

If a rotary pump is not delivering fluid at its discharge side, the first thing you should do is

Answer 25

Stop the pump