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plumbing help practice exam Flashcards

1
Q

You are required to use a 20-foot ladder placed up against a building that is 40’ high. At what horizontal distance from the base of the building must the ladder be?

a.
5

b.
6

c.
3

d.
4

A

A

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2
Q

Confined spaces are hazardous environments because they usually have:

a.
explosive atmospheres

b.
restricted access and egress

c.
limited room for maneuverability

d.
flood hazards

A

B

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3
Q

Scaffolding erected_______ feet above the ground must have guard rails.

a.
10

b.
4

c.
6

d.
8

A

A

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4
Q

Class “A” fire extinguishers are used on and contain.

a.
Combustible materials, Water

b.
flammable liquids, CO2

c.
Electrical components, foam

d.
Metal, CO2

A

a.
Combustible materials, Water

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5
Q

When using a Hilti powder actuated fastening tool, the device fails to fire when the trigger is pulled. The first thing you should do is?

a.
remove the cartridge

b.
keep the tool in position and wait 30 seconds

c.
depress the trigger again

d.
inspect the magazine

A

b.
keep the tool in position and wait 30 seconds

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6
Q

How many 2” pipes does it take to equal the volume capacity of a 6” pipe?

a.
6

b.
3

c.
8

d.
9

A

D

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7
Q

When using oxy-fuel cutting and welding equipment, a flashback arrestor protects the operator from?

a.
material blowback

b.
electrical shock

c.
bright flashes

d.
flame traveling into the hoses

A

D

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8
Q

Horizontally run of 1” type M copper pipe must be supported every:

a.
3 meters

b.
2.5 meters

c.
1.2 meters

d.
1 meter

A

B

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9
Q

Find the depth of the pipe invert at dimension X shown in Figure 1.
a.
1.90 m

b.
1.85 m

c.
1.95 m

d.
2.00 m

A

C

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10
Q

Water that is determined to have a PH of 5.5 would be considered:

a.
very acidic

b.
very alkaline

c.
mildly alkaline

d.
mildly acidic

A

D

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11
Q

Which copper tube is permitted for underground water distribution?

a.
type L hard

b.
type M soft

c.
type H hard

d.
type K soft

A

D

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12
Q

Which is not an approved method for joining cast iron waste pipe:

a.
welded joint

b.
compression joint

c.
mechanical joint

d.
caulked joint

A

A

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13
Q

Dielectric unions are used to:

a.
to prevent shocks

b.
prevent corrosion

c.
ground metallic pipe

d.
connect plastic to copper pipe

A

B

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14
Q

When installing glass piping; if one end needs to be field cut, the ends should be joined:

a.
bead to plain

b.
plain to plain

c.
bead to hub

d.
bead to bead

A

A

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15
Q

Bell and spigot cast iron is installed with the:

a.
spigot upstream

b.
bell downstream

c.
either works

d.
bell upstream

A

D

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16
Q

What force would be exerted on the gate of a closed 6” gate valve if the water pressure acting on it measured 46 Psig.

a.
2604

b.
1300

c.
867

d.
5202

A

B

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17
Q

Cement pipe installed below a 60 mm thick concrete floor must be at least how deep?

a.
Shall not bear on the pipe.

b.
600 mm

c.
300 mm

d.
150 mm

A

A

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18
Q

What is the maximum practical lift of a shallow well jet pump?

a.
80 feet

b.
25 feet

c.
30 feet

d.
50 feet

A

B

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19
Q

A backwater valve may be installed in a building drain provided that it is:

a.
trapped upstream

b.
normally open

c.
3” or larger

d.
properly vented

A

B

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20
Q

When a well pump turns on as soon as a faucet is used the most likely problem is:

a.
pump impeller is worn out

b.
defective pressure switch

c.
water logged pressure tank

d.
foot valve not holding

A

C

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21
Q

The discharge from a sump pump shall have the following fittings installed in order, in the direction of flow:

a.
shut-off, coupling, check valve

b.
check valve, union, shut-off valve

c.
check valve, shut-off valve, union

d.
union, check valve, shut-off valve

A

D

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22
Q

A gear pump is a positive displacement pump and must be installed with a:

a.
pressure relief valve

b.
pressure tank

c.
pressure switch

d.
pressure reducing valve

A

A

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23
Q

What type of trap is not permitted in a drainage system:

a.
bell trap

b.
P trap

c.
S trap standard

d.
drum trap

A

A

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24
Q

Where is the jet located in a deep well?

a.
at the pump

b.
below the foot valve

c.
above the foot valve

d.
top of the well

A

C

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25
Q

How would you increase the length of flush on a flushometer?

a.
turn regulating screw counter clockwise

b.
throttle the stop valve

c.
remove vacuum breaker

d.
turn regulating screw clockwise

A

D

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26
Q

What is the minimum length of a trap arm?

a.
no minimum

b.
1200 mm

c.
18”

d.
2 pipe diameters

A

D

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27
Q

A branch with 34 fixture units discharges into a sewage sump. What is the minimum size vent required for the sump?

a.
3”

b.
1.5”

c.
4”

d.
2”

A

A

28
Q

What is the maximum vertical fall of a water closet trap arm?

a.
4 m

b.
3 m

c.
2 m

d.
1 m

A

D

29
Q

A building’s roof measuring 90m by 50m would require how many flow-controlled roof drains?

a.
3

b.
8

c.
6

d.
4

A

C

30
Q

A flat roof measuring 20m by 26m with a horizontal wall on one side extended up 6m by 20m. Size the circular rainwater leader if the local 15 minute rainfall intensity is 24mm.

a.
3”

b.
6”

c.
4”

d.
5”

A

D

31
Q

A laboratory sink that receives bio-hazardous waste must be installed with a:

a.
Backwater valve

b.
Interceptor for organic waste

c.
Check valve

d.
Cleanout above the flood level rim

A

D

32
Q

The absorption rate of a septic field is determined by:

a.
linear feet of leech field

b.
percolation test

c.
water table

d.
soil analysis

A

B

33
Q

Medical gas piping is most often joined by:

a.
flared joints

b.
lead free solder

c.
brazed

d.
compression joints

A

C

34
Q

A circuit vented branch with a horizontal offset that uses two 45º fittings will require a:

a.
increase one pipe size

b.
additional relief vent

c.
additional circuit vent

d.
two relief vents

A

C

35
Q

Determine the amount of expansion that will occur when a 15m ABS pipe has a temperature change of 40C.

a.
47 mm

b.
25 mm

c.
39 mm

d.
54 mm

A

D

36
Q

Which backflow preventer is not a testable device?

a.
RPBA

b.
DCVA

c.
DCAP

d.
PVB

A

C

37
Q

The image above shows a 45º rolling offset. Find the length of pipe “C”.

a.
45.38”

b.
42.97”

c.
48.58”

d.
46.58”

A

D

38
Q

A properly cut thread on black iron pipe should allow how many hand turns with a fitting?

a.
4 1/2

b.
3 1/2

c.
1 1/2

d.
2 1/2

A

B

39
Q

A well with a water-tight casing requires a minimum standoff distance from a septic system of:

a.
25m

b.
15m

c.
20m

d.
30m

A

B

40
Q

An air conditioner that discharges 0.05 L/s of condensate into a floor drain, would equate to how many fixture units?

a.
1.6

b.
2360

c.
15.8

d.
45

A

A

41
Q

An interceptor may act as a trap for a fixture provided that:

a.
vent is increased one size

b.
it is located within 8’ of the fixture

c.
it has a 38mm water seal

d.
all of the above

A

C

42
Q

Underground piping installed in a dug trench should be covered with appropriate backfill to a height of:

a.
600mm

b.
200mm

c.
150mm

d.
300mm

A

D

43
Q

Which is not a hot water heating piping system:

a.
two pipe reverse return

b.
one pipe gravity return

c.
two pipe direct return

d.
series loop

A

B

44
Q

The ideal location for a circulator pump installed in a hot water heating system is:

a.
on the supply before the expansion tank

b.
on the supply after the expansion tank

c.
on the supply after the zone valve

d.
on the return close to the boiler

A

B

45
Q

A pipe that connects at its downstream end to two or more vent pipes and at its upper end to a vent stack or stack vent is a:

a.
common vent

b.
circuit vent

c.
header

d.
branch vent

A

D

46
Q

Certain types of welding rods need to be kept in an oven to maintain their properties and ensure optimal performance during the welding process. These include:

a.
High Hydrogen welding rods 7000

b.
Low Hydrogen welding rods 7018 and 7024

c.
Tungsten 7018

d.
Tungsten 6300

A

B

47
Q

When determining the location to install a condensing boiler what must be considered?

a.
homeowners preference

b.
existing vent location

c.
central to heating units

d.
near a floor drain

A

D

48
Q

The discharge piping from a service water heater’s temperature and pressure relief valve must

discharge within _______ of a floor drain or suitable area.

a.
150mm

b.
600mm

c.
not specified

d.
300mm

A

D

49
Q

Length is not a consideration when sizing this vent:

a.
stack vent

b.
vent header

c.
circuit vent

d.
relief vent

A

D

50
Q

A cross-fitting may not be used in a DWV system except to connect:

a.
branches that receive clear water waste

b.
back to back fixtures

c.
four vents

d.
fixture drains of three compartment sinks

A

C

51
Q

A ½” extracted tee may be formed from:

a.
3/4 type K

b.
1/2 type L

c.
1/2 type K

d.
3/4 type M

A

A

52
Q

If four shower heads are installed along a wall, what would the minimum measurement be between the two outermost heads?

a.
1200mm

b.
750mm

c.
2250mm

d.
3000mm

A

C

53
Q

The minimum size for vents serving an oil interceptor are:

a.
3

b.
2

c.
1 1/4

d.
1 1/2

A

C

54
Q

A four wire zone valve is wired to:

a.
thermostat, transformer, hi limit, motor

b.
transformer, hi limit, motor, circulator

c.
thermostat, transformer, end switches

d.
thermostat, transformer

A

C

55
Q

Which of the following fixtures may not be indirectly connected to a drainage system:

a.
commercial dishwasher

b.
water softener backwash

c.
drinking fountain

d.
sterilizer

A

A

56
Q

The minimum size for mobile home service connections are:

a.
4” sewer 1/2” water

b.
3” sewer 1/2” water

c.
3” sewer 3/4” water

d.
4” sewer 3/4” water

A

D

57
Q

A pressure reducing valve must be installed if the water service pressure is above:

a.
50 psi (344 Kpa)

b.
100 psi (690 Kpa)

c.
65 psi (450 Kpa)

d.
80 psi (550 Kpa)

A

D

58
Q

A twin-tank water softener will house the brine in one tank and the other tank will house the:

a.
zeolite

b.
soda ash

c.
green sand

d.
activated carbon

A

A

59
Q

Where should you locate a fin tube radiator within a room?

a.
inside walls

b.
where space permits

c.
under a window

d.
homeowners preference

A

C

60
Q

A private water-supplied cistern is fitted with a 3/4” make-up water pipe supplied by a municipal system. What size air gap would be required?

a.
1 1/2”

b.
1”

c.
2”

d.
3/4”

A

A

61
Q

Using the average pressure loss method. A 3/4” cold water branch with a developed length of 6.5m could supply how many public use showers?

NOTE: use (2.4 m/sec.)

a.
2

b.
8

c.
4

d.
6

A

C

62
Q

The abbreviation NPS refers to:

a.
thread taper

b.
threads per inch

c.
wall thickness

d.
pipe size

A

D

63
Q

What is the maximum horizontal offset permitted in a 3” soil or waste stack that is serving as a wet vent?

a.
2.5m

b.
1.8m

c.
1.2m

d.
4m

A

A

64
Q

Which manufacturing method produces the strongest pipe:

a.
lap welded

b.
spiral welded

c.
extruded

d.
butt welded

A

C

65
Q

A toilet seat used in a public washroom must be:

a.
elongated open front type

b.
plastic non-permeable type

c.
cover-less type

d.
round type

A

A

IP pvc plumbing review (8 decks)

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