Maintenance Class

Question 1

The two types of misalignment when connecting a pump and motor are angular and?

Answer 1

Eccentric

Question 2

If a pump is considered to be centrifugal, which of the following would result in an increase in power consumption?

Answer 2

Mineral Concentration

Question 3

Which of the following federal organizations is responsible for administering personal equipment guidelines?

Answer 3

OSHA

Question 4

Excess grease applied to bearings will give what warning before catastrophic failure?

Answer 4

Audible warning

Question 5

Keeping proper records of historical maintenance will be most useful when?

Answer 5

An unexpected but previously documented system failure occurs.

Question 6

The best reason for replacing a shear pin with a stronger pin with a stronger metal is what?

Answer 6

Only the original design shear pin should ever be placed back into service

Question 7

Which of the following valves is least appropriate for throttling purposes?

Answer 7

Gate Valve

Question 8

A worn pump impeller would most likely be the result of attempting to pump liquids high in which of the following?

Answer 8

Grit

Question 9

Closing the discharge valve on a positive displacement pump will result in which of the following?

Answer 9

Failure of the pump and components

Question 10

Any piece of equipment, specifically pumps, that are not used should have a routine run schedule performed. Which of the reasons is the best answer?

Answer 10

These pumps will need to be able to perform at 100% capacity

Question 11

A confined space that is known to contain a hazardous atmosphere will be made safe to enter by performing which of the following?

Answer 11

Ventilating the space until safe atmosphere is achieved

Question 12

The flash point of any flammable vapor refers to what?

Answer 12

The exact moment when explosive combinations of oxygen and vapor are achieved

Question 13

A safety data sheet is best suited for which of the following?

Answer 13

Establishing where and how all reagents and chemicals present should be stored.

Question 14

What could cause a misalignment of internal components of a secondary clarifier?

Answer 14

Wear on the side of the chain and sprockets

Question 15

What is another name for a rotary valve or a quarter turn valve?

Answer 15

Ball

Question 16

Maintenance of any equipment that is new and under warranty should always be based on?

Answer 16

O&M

Question 17

A trench that is 40 feet deep and 12 feet wide can be best described as?

Answer 17

Confined Space

Question 18

Magnesium and Zinc plates are located under the water level in a tank are most likely there for what?

Answer 18

Sacrificial cathode

Question 19

Which of the following mill most effectively reduce the amounts of emergency repairs?

Answer 19

Preventative and Predictive Maintenance

Question 20

Vacuum breakers, air gaps, and PVB are all items for what?

Answer 20

Prevent Cross-Connection

Question 21

Which type of fire extinguishers should be used for an electrical fire?

Answer 21

Class C

Question 22

Painting metal surfaces has sole purpose of what/

Answer 22

Corrosion

Question 23

What is the main reason for evacuating all the air in a volute casing?

Answer 23

Cavitation chances drop dramatically

Question 24

If a pump is considered dynamic which of the following can it not be?

Answer 24

Progressive Cavity

Question 25

The term torque is best described as?

Answer 25

The energy required to begin to move a rotatable object

Question 26

If a mechanical seal is leaking what should you do?

Answer 26

The seal needs to be safely replaced

Question 27

Materials such as concrete are most susceptible under what condition?

Answer 27

Highly Acidic waters

Question 28

Why should you run any equipment for as long as you possibly can before turning them off?

Answer 28

Longer runtimes decrease undue stress during startup.

Question 29

Unguarded drive couplings are best referred to as?

Answer 29

hazard

Question 30

Adding what liquid to soap results in grease?

Answer 30

Oil

Question 31

Which of the following is not a type of impeller

Answer 31

Partially closed

Question 32

Which of the following would be considered as corrective maintenance

Answer 32

Replacing a cracked drive shaft

Question 33

Closing the suction side valve on a centrifugal pump will eventually result in?

Answer 33

Cavitation of the impeller.

Question 34

What is the sacrificial part located on the drive shaft?

Answer 34

Sleeve

Question 35

Having the original maintenance manuals from the manufacturer will help with what?

Answer 35

Troubleshooting

Question 36

Centrifugal pumps operate on 2 theories

Answer 36

Energy transfer and centrifugal force

Question 37

The impellers function in a pump is

Answer 37

Transfer of Energy

Question 38

Energy within a pump is transferred from velocity head to pressure head by?

Answer 38

Shape of volute case

Question 39

An inside mechanical seal would be

Answer 39

A seal with scaling faces inside the stuffing box

Question 40

A suction side of a pump should have what type of reducer?

Answer 40

Eccentric

Question 41

Cavitation can be cause by what

Answer 41

Over Pumping

Question 42

What would require external seal water?

Answer 42

Muddy or gritty water being pumped or Suction lift exceeds 15 feet

Question 43

The two classes of mechanical couplings are?

Answer 43

Rigid and Flexible

Question 44

Can a bearing be over lubricated?

Answer 44

Yes

Question 45

For a line shaft turbine the entire bowl assembly should or shouldn't be underwater?

Answer 45

Should be

Question 46

Excessive upthrust in a line shaft turbine is caused by?

Answer 46

Low water levels

Question 47

How do you determine suitable oil viscosity?

Answer 47

Operating speed Operating Temperature Load Carried

Question 48

For each 20 degrees F rise in temp, an oils life is reduced by how much?

Answer 48

50 percent

Question 49

How are torque wrenches stated?

Answer 49

Inch pounds for small fittings Foot pounds for larger fittings

Question 50

Should u use a wrench as a hammer?

Answer 50

No

Question 51

What did Bernoulli say?

Answer 51

As the velocity of fluid flow increases the pressure exerted by the fluid decreases.

Question 52

What are the 4 types of lubricants?

Answer 52

Liquid-Oils Semi Solid-Grease Solid-Metal Gas-When separation is needed

Question 53

Viscosity is what?

Answer 53

Thickness of oil

Question 54

What is the most common soap base for grease?

Answer 54

Lithium

Question 55

3 lube selection criteria

Answer 55

Flash Point- Temp at which vapor will burst into flame Fire Point- Temp at which lubrication will burn Pour Point- Temp below which oil will not pour

Question 56

What is a pump?

Answer 56

Mechanical device used to force water or other liquids to move

Question 57

What is a Drive?

Answer 57

A source of power designed to supply force and motion to drive machinery

Question 58

Dynamic Pump

Answer 58

Energy is added continuously

Question 59

Displacement Pumps

Answer 59

Energy is added to a set volume

Question 60

How long is the break in period when replacing packing?

Answer 60

24hrs

Question 61

What is the purpose of packing?

Answer 61

Controls leakage along the shaft and prevents air from seeping into volute case.

Question 62

What is a bearing?

Answer 62

Anti friction device