Exam Bank

Question 1

Each stage of a submersible multi-stage centrifugal pump will increase the water pressure by approximately ______psi

Answer 1

9

Question 2

A method of water treatment that is primarily used to soften hard water is _______

Answer 2

cation exchange

Question 3

A substance that releases hydrogen ions when dissolved in water is a/an

Answer 3

acid

Question 4

An underground tank for storing water is the definition of

Answer 4

cistern

Question 5

A mixture used to seal the annular space between a casing and a well borehole is called

Answer 5

grout

Question 6

The _______ usually turn the water pump on and off

Answer 6

pressure switch

Question 7

Calculate the lower setting of a pressure switch for a private water system when:
suction head = 18 feet
discharge head = 20
Point of use pressure = 21 psi

Answer 7

37.5 psi

Question 8

The acronym US gpm stands for

Answer 8

US gallons per minute

Question 9

A sub-surface disposal field must have lined trenches if the percolation rate is faster than _____ minutes per 25 minutes

Answer 9

5

Question 10

A chemical-free iron filter uses _______ to begin the oxidation of the ferrous iron during water treatment.

Answer 10

injected air

Question 11

What is the recommended pressure differential between the cut-in and the cut-out pressure settings on a pressure tank installed in a private water supply system?

Answer 11

20 psi

Question 12

A water well that is drilled in a confined aquifer is normally called a/an _____________ well

Answer 12

artesian

Question 13

A _____ is typically installed on the end of a suction line

Answer 13

foot valve

Question 14

The septic chamber of a private sewage disposal system must hold the raw sewage for a minimum of _____ hours

Answer 14

24

Question 15

A miniature expansion tank that is installed at the point of use on a private water supply system is called a/an

Answer 15

elastic cell

Question 16

A stringy slimy growth in the tank of a water closet will indicate the presence of _______ in the water supply

Answer 16

bacterial iron

Question 17

The expected daily sewage volume from a junior high school with 120 students is _______ litres

Answer 17

8400

Question 18

With resect to water analysis, the letters TDS stand for:

Answer 18

Total dissolved solids

Question 19

True or False: When using a clamp-on ammeter to measure the current draw of a pump motor, the clamp must only be around one conductor

Answer 19

True

Question 20

When pressure testing the piping sections of a private water supply system, the recommended minimum pressure test would be ______ psi for a minimum of two hours

Answer 20

100

Question 21

If the sludge layer in a septic tank is ______mm or more deep, it is recommended to have the tank cleaned.

Answer 21

450

Question 22

A submersible water well pump does not need to be ______

Answer 22

primed

Question 23

Most flush valve require a minimum operating pressure of ____kPa

Answer 23

100

Question 24

Forged steel socket weld fittings are commonly used to join ______ mm or smaller diamter piping

Answer 24

50

Question 25

What type of temperature controller has a metal tube that has a high expansion rate, the rod is metal with a low expansion rate, the tube is rigidly connected to the valve body and the rod is fastened in the tube at one end only, heating of the outer tube causes the disc to move toward the seat cutting of the gas flow

Answer 25

rod and tube

Question 26

Fittings used on a medical gas system that are half inch or larger must be:

Answer 26

silver brazed

Question 27

True or false nipples can be used on natural gas or propane piping systems

Answer 27

False

Question 28

Which terms describes the highest temperature at which a metal is completely solid:

Answer 28

Solidus

Question 29

what color code strip does a type K copper pipe have

Answer 29

green

Question 30

true or false: polyethylene plastic pipe can be joined using solvent cement

Answer 30

False

Question 31

the Backwater valves allowed in the building drain are the types that are _________

Answer 31

either normally open or closed

Question 32

manual valve used for lawn irrigation should be made of

Answer 32

either PVC or brass

Question 33

which is the only pipe that requires no special coatings

Answer 33

vitrified clay

Question 34

the distance from the base of the stack to where a branch is taken off for a drain should be at least ____________pipe diameters

Answer 34

10

Question 35

what is the pressure rating in psi for 1 inch K imax glass pipe

Answer 35

100

Question 36

true or false: a straight cut on plastic pipe is not imperative as the bonding area is not significantly reduced

Answer 36

True

Question 37

what is the function of the sacrificial anode rod in a hot water tank

Answer 37

to reduce corrosion effect

Question 38

when installing water meters, installations of 1/2 in to____ inch are to be threaded

Answer 38

2.5

Question 39

Polyvinyl chloride plastic piping has a maximum operating temperature of_____F

Answer 39

140 F

Question 40

the relief sent for each story must be equal in size to the branch or fixture drain or ________ inches whichever is smaller

Answer 40

1.5

Question 41

When selecting the proper telescopic expansion joint it is critical that the axial movement is at least

Answer 41

equal to the maximum pipe movement

Question 42

which of the following best describes cartridge style faucet operation?

Answer 42

provide the control mechanism for water flow within the cartridge itself

Question 43

using the unified National fine system, the threads per inch _______ as the bolt size increases:

Answer 43

stays the same

Question 44

caulking lead must be______ percent pure

Answer 44

99.73

Question 45

which of the following acids attacks glass pipe at all temperatures

Answer 45

Sulfuric

Question 46

a spud wrench in the plumbing trade is typically used for tightening

Answer 46

components that have special finishes

Question 47

relief fence must be installed on horizontal wet vented branches ________ of the lowest connected trap arm the wet vented branch

Answer 47

Upstream

Question 48

what is the main difference between proxylene thermoplastic pipe and polypropylene plastic pipe

Answer 48

temperature ratings

Question 49

true or false: compressed air can be used to turn heating systems off or on

Answer 49

False

Question 50

if two 90° bends are used as an expansion joint the pipe guides should be placed _________ pipe diameters from the bends

Answer 50

4

Question 51

what is the largest size that a cast iron base water meter is available in

Answer 51

Three

Question 52

the air pipes Downstream of the receiver on a compressed air system should be:

Answer 52

sloped to drain moisture away from the receiver tank

Question 53

which of the following describes sulfured compounded oils

Answer 53

combinations of fatty oils such as lard or Canola

Question 54

section 15 of the heating code deals with

Answer 54

auxiliary systems

Question 55

when designing a compressed air system it is critical to make sure that:

Answer 55

sufficient air is available at the outlet without a noticeable pressure drop

Question 56

when copper tube boilers are used it is critical that:

Answer 56

they only be used where slow recovery is required

Question 57

what is the most common amount of tin found in bronze

Answer 57

55

Question 58

When installing underground sewer piping, the piping should be supported:

Answer 58

Throughout its entire length

Question 59

a half inch water supply opening must have a vertical unobstructed distance above the flood level rim of a fixture that is no less than _____mm

Answer 59

15

Question 60

when performing an air pressure test of water service and distribution systems, the system being tested must hold the test pressure for a _____________ hour period

Answer 60

Two

Question 61

according to the National Plumbing code of Canada - 1995, A sump pump that supplies 12 imperial gallons per minute would have a hydraulic load of ______ fixture units

Answer 61

6

Question 62

The valve that is installed in the water service pipe at the customer's property line is called a:

Answer 62

curb cock