Tpc 344

Question 1

How can water pressure be expressed?

Answer 1

Psi, or head pressure

Question 2

The available NPSH of a system must be…

Answer 2

Equal to or greater than the required NPSH of the pump

Question 3

The formation of vapor pockets or bubbles in a liquid is called?

Answer 3

Cavitation

Question 4

What is the horsepower required to drive a pump called?

Answer 4

Brake horsepower

Question 5

1 electrical horsepower is equal to how many watts?

Answer 5

746 watts

Question 6

The area that surrounds and houses the packing is called?

Answer 6

The stuffing box

Question 7

For four or more rings each joint should be how far apart from the proceeding joint?

Answer 7

90 degrees

Question 8

The most common mechanical seal configuration is the?

Answer 8

Single internal seal

Question 9

In some mechanical seals, the rotating element is secured to the shaft by a flexible rubber material called?

Answer 9

A boot

Question 10

Friction is the major cause of burned seals, friction is the result of…

Answer 10

Improper lubrication

Question 11

When grouting the baseplate how long should you allow the grout to set for?

Answer 11

At least 48 hours

Question 12

When you tighten the hold down fasteners a certain amount of spring will be created, how can you remove spring?

Answer 12

Place a dial indicator on one foot

Question 13

What is bearing end play?

Answer 13

Axial movement of the shaft

Question 14

Cavitation is a phenomenon caused by?

Answer 14

A pressure loss in the suction line of a pump system

Question 15

What is ring seizure?

Answer 15

Loss of clearance between the rings

Question 16

If both bearings are on the same side you the impeller the one nearest the impeller is called?

Answer 16

The inboard bearing

Question 17

What is the most common sign of cavitation?

Answer 17

Pitting, small holes or indentations on the back sides of the impeller vanes

Question 18

The runout reading should not exceed how many thousandths?

Answer 18

.003

Question 19

Too much clearance between the two sets of rings will cause…

Answer 19

Leakage of fluid back into the suction side of the pump

Question 20

When installing a gasket you may wish to…

Answer 20

Shellac the lower half of the casing

Question 21

What are the most commonly used type of all rotary pumps?

Answer 21

External gear pumps

Question 22

What keeps the sliding vanes in contact with this inner surface

Answer 22

Centrifugal force

Question 23

How long should a riser be?

Answer 23

A riser should be about 5 times as long as the diameter of the pipe

Question 24

In most rotary pumps what is used to lubricate the bearings supporting the shaft?

Answer 24

The fluid being handled by the pump

Question 25

If a pump is not delivering fluid at the discharge side what is the first thing you do?

Answer 25

Stop the pump at once