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Plumbing Year 4 > Red Seal Gas (simplified Q&A's) > Flashcards

Red Seal Gas (simplified Q&A's) Flashcards

1
Q

Fitting that is prohibited

A

Continuous thread

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2
Q

Set point of low temperature boilers with a cut-in of 20 degrees F?

A

180 degrees F

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3
Q

Max allowable measurement for CO

A

400 ppm

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4
Q

Number of expansion loops for 1 1/2” pipe at 250 ft?

A

2

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5
Q

Pipe reused has to be

A

Inspected, cleaned and tested

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6
Q

High limit actuates in a boiler system does what?

A

Cuts power to gas valve

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7
Q

Final test (finish piping) tested for how long?

A

Test for 10 min

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8
Q

How do you verify draft?

A

Smoke pen before draft hood

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9
Q

What device is faulty?

Open circuit - 20mV DC
Closed circuit - 12mv DC
Dropout Test - 6mV DC

A

Thermocouple

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10
Q

How do you convert natural gas to propane gas on an appliance?

A

Change the rating plate info

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11
Q

Shortest sensing paddle is too long to fit in appliance, what do you do?

A

Trim the paddle

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12
Q

Max length of flex connector?

A

2 feet

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13
Q

Storage garage combustable clearance?

A

18”

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14
Q

Repair garage combustable clearance?

A

54”

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15
Q

High limit continues to activate when there’s a call for heat, what’s the issue?

A

Dirty filter

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16
Q

Input exceeds manufacturers rating, what do you adjust?

A

Lower manifold pressure

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17
Q

How many lbs of propane will a cylinder with a WC (water capacity) of 260 hold at max filling density?

A

106 lbs

260 x 0.8 = 208 lbs
208 lbs x 0.51 RD = 106.08 lbs C3H8

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18
Q

Method to seal PP pipe

A

Gasket

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19
Q

With regards to properly threaded connections, how many exposed threads can there be?

A

2-3

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20
Q

Class 2 Transformer VA rating

A

100 VA

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21
Q

Max VAC output rating for a Class 2 Transformer

A

30 VAC

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22
Q

Min VAC output rating for a Class 2 Transformer

A

24 VAC

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23
Q

Combustion air fan capacity number to remember

A

1.08

24
Q

What condition must be met when installing a boiler on a non-combustable floor?

A

Level floor

25
Q

Allowable CO concentration in a dwelling?

A

5 ppm

26
Q

What causes a lifting flame?

A

Too much gas pressure and/or too much primary air

27
Q

What is the pipe schedule used for liquid propane?

A

Schedule 80

28
Q

Plastic pipe must be installed with what for underground installations?

A

Tracer wire (14g)

29
Q

Max reading on test gauge for a 50 psig pressure test?

A

200 psig

(6.22.2b)
50 psig x 3 = 150 + 50 = 200 psig MAX range

30
Q

Material that can’t be “field bent”

A

Soft drawn

31
Q

Spark gap for IPI?

A

1/8”

32
Q

Thermocouple must be inserted into a pilot flame by how much?

A

3/8” - 1/2”

33
Q

Teflon tape applied how?

A

Clockwise with 50% overlap leaving 2 starter threads (6.9.6)

34
Q

Flare fitting tightened how?

A

With a wrench and no pipe dope

35
Q

Ventilation opening sizing rule

A

Minimum 10sq.in or 10% of the combustion air opening, whichever is largest

36
Q

Example of an operating control

A

Thermostat

37
Q

Double-acting barometric damper used for what appliance?

A

Incinerator

38
Q

Color of wire normally used for 24 V power

A

Red

39
Q

Line relief or OPPD sizing method?

A

100% of largest + 50% of the rest

40
Q

No relief regulators sizing method?

A

2 times the total area

41
Q

What is the dirt pocket size for a 400,000 BTUH pool heater with a 3” pipe?

A) 3”
B) 2”
C) 4”
D) 6”

A

B) 2”

42
Q

What would best describe a document required when adding components to a heating system?

A) Mechanical drawing
B) As built drawing
C) Architechual drawing
D) Hydronic drawing

A

B) As built drawing

43
Q

A combustion air supply duct is not required for which of the following?

A) A 40,000 BTU power burner water heater and a 45,000 BTU water heater w/ a draft hood

B) A counter-flow furnace

C) An 80 MBH direct vent furnace and a 40 MBH water heater

D) A 60,000 BTU power burner furnace and a 40,000 BTU power burner water heater

A

C) An 80 MBH direct vent furnace and a 40 MBH water heater

(8.2.3)
An outdoor air supply shall not be required for a single water heater with an input of 50,000 BTUH or less within an enclosure or structure where there are no other appliances that require an air supply.

44
Q

Max distance between identification labels on a residential copper gas line?

A) 3 feet
B) 4 feet
C) 5 feet
D) 6 feet

A

D) 6 feet

45
Q

Prior to electro-fusion joining of HDPE, the pipe surface should be prepared by using what tool?

A

An approved rasp-type tool (file)

46
Q

After the pipe surface has been prepared for electro-fusion joining and virgin surface has been exposed, any surface contamination should be removed using;

A) Warm water
B) Scraper
C) Fine-grit sand cloth
D) 70% isopropyl alcohol concentration

A

D) 70% isopropyl alcohol concentration

47
Q

What steps are required to prepare piping for a mechanical compression joint?

A

Cut, ream, bevel and mark

48
Q

Minimum distance required between a direct vent outlet and a combustion air hood?

A) 8 feet
B) 6 feet
C) 3 feet
D) 10 feet

A

C) 3 feet (8.14.8g)

49
Q

What hazardous material would most likely be component of older boiler refractory?

A

Asbestos (If not shown choose silica)

50
Q

Propane tanks are inspected by whom?

A

Provincial Boiler Pressure Vessels Branch - ABSA (Alberta Boilers Safety Association)

51
Q

Where is the proper installation location of a cooling coil in an up-flow furnace system?

A

In the discharge plenum, downstream of the heat exchanger

52
Q

How would a totally blocked vent affect the operation of a gas regulator?

A) Pressure fluctuates
B) Pressure increase
C) Pressure decrease
D) Pressure is hunting

A

B) Pressure increase

53
Q

Who is responsible to establish and uphold PPE standards?

A

OH & S

54
Q

What is the mass of one cubic foot of propane liquid?

A

31.7 lbs

(Half of water)
62.4lbs x 0.51 RD = 31.82 lbs/CF

55
Q

What clearance is required between a regulator and an AC unit outside?

A

3 feet

56
Q

Where should a gas fitter install a LWCO on a hydronic heating system?

A

In the supply or return piping above the boiler

Plumbing Year 4 (28 decks)

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