Wt3 Part 3 Exam Practice

Front 1

What type of pump is not seriously damaged if the discharge valve is closed for a short period of time while the pump is running.

Back 1

Centrifugal pump

Front 2

Mechanical seals need to be replaced when Leakage occurs from the..

Back 2

Stuffing box

Front 3

What should be your most important concern after a chemical spill.

Back 3

Health related effects

Front 4

A ventury Meter measures quantity of fluid by.

Back 4

Velocity of the fluid past a given point

Front 5

Vibration in pumps may be caused by improper...

Back 5

Motor / pump Alignment

Motor / pump Alignment

Front 6

Which of the following first state actions would you perform first if an operator inhales Chloride gas.

Back 6

Remove the victim from the area

Front 7

A lantern ring is.

Back 7

A space of ring in a pump packing gland to improve sealed water distribution.

Front 8

You should never attempt to install troubleshoot, maintain, repair. Or replace electrical equipment panels controls wearing or circuits unless.

Back 8

You know what you're doing, are qualified, and authorized.

Front 9

A component of a centrifugal pump sometimes installed on the end of a pipe to hold the priming is known as.

Back 9

A foot valve.

Front 10

Proper alignment between two shafts can be checked using a.

Back 10

Straight edge and feeler gauge.

Front 11

Wearing rings are installed in a pump to.

Back 11

Minimize internal water leakage

Front 12

The minimum pressure required in a water distribution system is.

Back 12

20 Psi

Front 13

Improper rotation in a centrifugal pump may cause.

Back 13

Impeller spin off

Front 14

A switch that has been tagged and locked out, the warning tag must have.

Back 14

Name and signature of the person who locked out the switch.

Front 15

Which of the following parts in a centrifugal of pump restrict flow between the impeller discharge and the suction areas.

Back 15

Wear ring

Front 16

The most likely source of a radioactive isotope in water collection systems include.

Back 16

Hospitals

Front 17

Which Is not a lift station level control system.

Back 17

Well point

Front 18

Hz Stands for..

Back 18

Cycles per second

Front 19

Hydrogen peroxide controls odors by.

Back 19

Oxidizing sulfide compounds.

Front 20

The advantage of an Balanced mechanical seal is.

Back 20

The wearing force between the ground surface does not vary regardless of the suction head.

Front 21

Bubbler level sensing transmitters are placed.

Back 21

Anywhere inside the tank

Front 22

Wear rings are installed in a pump to.

Back 22

Concentrate wear on an economically replaceable part.

Front 23

The flushing water pressure in a water lubricated wastewater pump should be _____ Than the pump discharge pressure.

Back 23

5 psi more.

Front 24

When packing a ventury field pump, the packing gland should be tightened_______

Back 24

Slowly over a period of several hours.

Front 25

As the pillar wears on a pump, the pump efficiency will.

Back 25

Decrease

Front 26

Oxygen deficiency occurs when the oxygen level is less than_____ by volume.

Back 26

19.5%

Front 27

Important considerations when reviewing plans for a lift station include.

Back 27

Access

Front 28

Chlorine cylinders should be stored.

Back 28

In a clean, dry location.

Front 29

The electrical disconnection for a pump station motor can trip out under which one of the following possibilities.

Back 29

Strike by a lightning.

Front 30

A megger is used for.

Back 30

Measuring insulation resistance in motors and wiring.

Front 31

Centrifugal pump parts include

Back 31

Volute

Front 32

Which of the following is a type of shore.

Back 32

Aluminum hydraulic

Front 33

A parshall flume is a type of.

Back 33

Open channel use for flow metering.

Front 34

When the static level of the groundwater is fifty feet below the ground surface, the most suitable type of pump is

Back 34

Turbine pump

Front 35

If the pump bearing on the horizontal centrifugal pumps is over lubricated, the most important effect is that the extra lubricant may cause is

Back 35

overheating and possible failure on the bearings.

Front 36

An altitude valve is a Device used to.

Back 36

Regulate the water surface level in a storage tank

Front 37

Which of the following must be checked when doing maintenance on a pneumatic controller.

Back 37

Air supply availability.

Front 38

Enclosed open and semi closed are terms used for a designation and selection off.

Back 38

Impellers

Front 39

A pump is delivering less than the expected rate of the discharge. What can cause this to happen.

Back 39

Discharge head to high

Front 40

Which component of a centrifugal pump moves the water.

Back 40

Impeller

Front 41

Which type of valve on the discharge side of the pump is most effective in reducing the pressure surges when starting or stopping the pump

Back 41

Controlled glove Valve

Front 42

When the pumping rate is increased, the effect on the cone of depression is to.

Back 42

Lower the pumping level

Front 43

When a pump is leaking excessively and around the packing gland the operator should first turn the pump off and..

Back 43

Tighten the packing gland.

Front 44

as the temperature of the water increases the disinfecting action of the chlorine is.

Back 44

More effective

Front 45

The discharge flow rate of a piston type pump.

Back 45

Is constant at a constant speed

Front 46

The performance curve of a pump reflects

Back 46

The pump capacity, efficiency and horsepower.

Front 47

In general, what is the maximum practical lift of pumps

Back 47

15 to 25 ft

Front 48

What type of pump has rotating impellers within a pump case.

Back 48

Centrifugal

Front 49

Which of the following best defines the cone of depression

Back 49

Depression around the well of the water surface caused by pumping water from the well.

Front 50

A three phase induction motor Driving a centrifugal pump normally draws 20 amps. If one phase of the power supply is lost..

Back 50

The motor will run with the two remaining phaces each drawing 34.5 amps

Front 51

A limitation of the enclosed electrode Controller is that.

Back 51

If the bulb breaks. The electrolyte solution is lost.

Front 52

Static suction lift describes.

Back 52

The vertical distance from the pump center line down to the water level surface.

Front 53

Throttling the discharge valve on a centrifugal pump would.

Back 53

Customer model to draw less amperage.

Front 54

Suction head means.

Back 54

That the pump has a flooded suction

Front 55

Piston, plunger and diaphragm are classified as.

Back 55

Positive displacement

Front 56

The primary advantage of the parachute type safety hardness is that it.

Back 56

Prevents a limp body from falling out.

Front 57

When testing for combustible or toxic gases, what should be the order of the tests.

Back 57

Explosive conditions, combustible gas, oxygen deficiency, hydrogen sulfide.

Front 58

Ideally, the p h matter should be standardized.

Back 58

Before each use.

Front 59

You are working with bearings on a shaft. And need to heat it up. What is the maximum temperature that can be used.

Back 59

190 F

Front 60

Hinge pins, flappers and slats are components found in.

Back 60

Check Valves

Front 61

The invert of a pipe refers to.

Back 61

Center of the bottom on the inside

Front 62

Rising stem and non rising stem are terms used to describe.

Back 62

Gate Valves

Front 63

Symptoms and operator might experience in an oxygen deficient atmosphere include.

Back 63

Diziness, difficulty breathing And nausea

Front 64

Diseases or infections that a collection system operator should be exposed to include all of the following except.

Back 64

Malaria

Front 65

Which of the following is a primary function of couplings.

Back 65

Compensate for alignment changes

Front 66

Positive displacement pumps should be operated when.

Back 66

Suction and discharge line valves are opened.

Front 67

What is the main purpose of priming.

Back 67

To replace air with water inside the pump

Front 68

Which of the following parts in a centrifugal pump restricts flow between the impeller discharge and suction areas.

Back 68

Wear rings.

Front 69

Limitations of a canister type respirator include.

Back 69

Uselessness in oxygen deficient atmospheres, uselessness after expiration date, effectiveness only in certain class atmosphere.

Front 70

The valve that has the greatest friction loss is.

Back 70

The globe valve.

Front 71

What is the maximum theoretical suction lift of a centrifugal pump at sea level.

Back 71

34 feet

Front 72

What type of motor is used when infrequent starting is required and the load needs to be brought up to speed very quickly.

Back 72

Capacitor-start

Front 73

Lookout/ tagout is.

Back 73

Use to prevent accidental startup of equipment being serviced.

Front 74

Schedule 40 refers to the pipe.

Back 74

Wall thickness.

Front 75

The vertical distance between two points expressed as either feet or pounds per square inch is called.

Back 75

Head