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Plumbing Level 3 > Exam Bank > Flashcards

Exam Bank Flashcards

1
Q

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

A

9

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2
Q

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

A

cation exchange

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3
Q

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

A

acid

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4
Q

An underground tank for storing water is the definition of

A

cistern

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5
Q

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

A

grout

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6
Q

The _______ usually turn the water pump on and off

A

pressure switch

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7
Q

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

A

37.5 psi

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8
Q

The acronym US gpm stands for

A

US gallons per minute

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9
Q

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

A

5

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10
Q

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

A

injected air

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11
Q

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?

A

20 psi

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12
Q

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

A

artesian

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13
Q

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

A

foot valve

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14
Q

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

A

24

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15
Q

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

A

elastic cell

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16
Q

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

A

bacterial iron

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17
Q

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

A

8400

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18
Q

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

A

Total dissolved solids

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19
Q

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

A

True

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20
Q

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

A

100

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21
Q

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

A

450

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22
Q

A submersible water well pump does not need to be ______

A

primed

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23
Q

Most flush valve require a minimum operating pressure of ____kPa

A

100

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24
Q

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

A

50

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25
Q

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

A

rod and tube

26
Q

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

A

silver brazed

27
Q

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

A

False

28
Q

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

A

Solidus

29
Q

what color code strip does a type K copper pipe have

A

green

30
Q

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

A

False

31
Q

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

A

either normally open or closed

32
Q

manual valve used for lawn irrigation should be made of

A

either PVC or brass

33
Q

which is the only pipe that requires no special coatings

A

vitrified clay

34
Q

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

A

10

35
Q

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

A

100

36
Q

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

A

True

37
Q

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

A

to reduce corrosion effect

38
Q

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

A

2.5

39
Q

Polyvinyl chloride plastic piping has a maximum operating temperature of_____F

A

140 F

40
Q

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

A

1.5

41
Q

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

A

equal to the maximum pipe movement

42
Q

which of the following best describes cartridge style faucet operation?

A

provide the control mechanism for water flow within the cartridge itself

43
Q

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

A

stays the same

44
Q

caulking lead must be______ percent pure

A

99.73

45
Q

which of the following acids attacks glass pipe at all temperatures

A

Sulfuric

46
Q

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

A

components that have special finishes

47
Q

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

A

Upstream

48
Q

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

A

temperature ratings

49
Q

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

A

False

50
Q

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

A

4

51
Q

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

A

Three

52
Q

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

A

sloped to drain moisture away from the receiver tank

53
Q

which of the following describes sulfured compounded oils

A

combinations of fatty oils such as lard or Canola

54
Q

section 15 of the heating code deals with

A

auxiliary systems

55
Q

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

A

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

56
Q

when copper tube boilers are used it is critical that:

A

they only be used where slow recovery is required

57
Q

what is the most common amount of tin found in bronze

A

55

58
Q

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

A

Throughout its entire length

59
Q

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

A

15

60
Q

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

A

Two

61
Q

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

A

6

62
Q

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

A

curb cock

Plumbing Level 3 (2 decks)

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