Red Seal Gas (simplified Q&A's)

Question 1

Fitting that is prohibited

Answer 1

Continuous thread

Question 2

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

Answer 2

180 degrees F

Question 3

Max allowable measurement for CO

Answer 3

400 ppm

Question 4

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

Answer 4

2

Question 5

Pipe reused has to be

Answer 5

Inspected, cleaned and tested

Question 6

High limit actuates in a boiler system does what?

Answer 6

Cuts power to gas valve

Question 7

Final test (finish piping) tested for how long?

Answer 7

Test for 10 min

Question 8

How do you verify draft?

Answer 8

Smoke pen before draft hood

Question 9

What device is faulty?

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

Answer 9

Thermocouple

Question 10

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

Answer 10

Change the rating plate info

Question 11

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

Answer 11

Trim the paddle

Question 12

Max length of flex connector?

Answer 12

2 feet

Question 13

Storage garage combustable clearance?

Answer 13

18”

Question 14

Repair garage combustable clearance?

Answer 14

54”

Question 15

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

Answer 15

Dirty filter

Question 16

Input exceeds manufacturers rating, what do you adjust?

Answer 16

Lower manifold pressure

Question 17

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

Answer 17

106 lbs

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

Question 18

Method to seal PP pipe

Answer 18

Gasket

Question 19

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

Answer 19

2-3

Question 20

Class 2 Transformer VA rating

Answer 20

100 VA

Question 21

Max VAC output rating for a Class 2 Transformer

Answer 21

30 VAC

Question 22

Min VAC output rating for a Class 2 Transformer

Answer 22

24 VAC

Question 23

Combustion air fan capacity number to remember

Answer 23

1.08

Question 24

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

Answer 24

Level floor

Question 25

Allowable CO concentration in a dwelling?

Answer 25

5 ppm

Question 26

What causes a lifting flame?

Answer 26

Too much gas pressure and/or too much primary air

Question 27

What is the pipe schedule used for liquid propane?

Answer 27

Schedule 80

Question 28

Plastic pipe must be installed with what for underground installations?

Answer 28

Tracer wire (14g)

Question 29

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

Answer 29

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

Question 30

Material that can't be "field bent"

Answer 30

Soft drawn

Question 31

Spark gap for IPI?

Answer 31

1/8"

Question 32

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

Answer 32

3/8" - 1/2"

Question 33

Teflon tape applied how?

Answer 33

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

Question 34

Flare fitting tightened how?

Answer 34

With a wrench and no pipe dope

Question 35

Ventilation opening sizing rule

Answer 35

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

Question 36

Example of an operating control

Answer 36

Thermostat

Question 37

Double-acting barometric damper used for what appliance?

Answer 37

Incinerator

Question 38

Color of wire normally used for 24 V power

Answer 38

Red

Question 39

Line relief or OPPD sizing method?

Answer 39

100% of largest + 50% of the rest

Question 40

No relief regulators sizing method?

Answer 40

2 times the total area

Question 41

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"

Answer 41

B) 2"

Question 42

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

Answer 42

B) As built drawing

Question 43

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

Answer 43

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.

Question 44

Max distance between identification labels on a residential copper gas line? A) 3 feet B) 4 feet C) 5 feet D) 6 feet

Answer 44

D) 6 feet

Question 45

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

Answer 45

An approved rasp-type tool (file)

Question 46

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

Answer 46

D) 70% isopropyl alcohol concentration

Question 47

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

Answer 47

Cut, ream, bevel and mark

Question 48

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

Answer 48

C) 3 feet (8.14.8g)

Question 49

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

Answer 49

Asbestos (If not shown choose silica)

Question 50

Propane tanks are inspected by whom?

Answer 50

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

Question 51

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

Answer 51

In the discharge plenum, downstream of the heat exchanger

Question 52

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

Answer 52

B) Pressure increase

Question 53

Who is responsible to establish and uphold PPE standards?

Answer 53

OH & S

Question 54

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

Answer 54

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

Question 55

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

Answer 55

3 feet

Question 56

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

Answer 56

In the supply or return piping above the boiler