Gas RED SEAL

Question 1

what is the maximum pilot input?

Answer 1

3% of total input in BTU

Question 2

Which procedure would be used to measure manifold pressure?

Answer 2

remove outlet screw, screw in adaptor, connect manometer and turn on gas.

Question 3

Which appliance listed below cannot use a double-acting barometric damper?

Answer 3

Incinerator

Question 4

how would a totally blocked vent affect operation of a gas regulator?

Answer 4

the pressure would increase

Question 5

A combustion fan receives an output signal from a/an:

Answer 5

electronically commutated motor ECM

Question 6

how is a flare fitting tightened?

Answer 6

wrench and no pipe dope

Question 7

how is draft verified on a draft hood?

Answer 7

a smoke pen before the draft hood

Question 8

the expected voltage measured between the “L1” and “R” terminals on a conventional furnace with the secondary voltage grounded to the earth ground would be:

Answer 8

96 volts

Question 9

Whats is the limit of the CO gas in a dwelling

Answer 9

5 ppm

Question 10

what is the positive pressure relief setting required for a system supply pressure of 2 psig and an appliance rating of 30” wc?

Answer 10

30 “w.c.

Question 11

Burner output calculation?

efficiency?

Answer 11

3600/ avg rev per minute x gauge size x CV = Output

% x output - output = efficiency

Question 12

when can pipe be re-used?

Answer 12

after being inspected, cleaned and tested.

Question 13

What is the maximum reading on a test gauge for a 50 psig pressure test?

Answer 13

200 psig

Question 14

which is not allowed to be installed?

Answer 14

a domestic gas fired clothes dryer in a bathroom

Question 15

LOOK up PROPANE FILL NUMBERS

Question 16

what would happen if the high limit actuates in a boiler system?

Answer 16

cuts power to gas valve

Question 17

With direct reference to the electrical measurements below, what device is faulty?

i. open circuit test: 20 mv DC
ii. closed circuit test: 12 mv DC
iii. dropout test 6: mv DC

Answer 17

Thermocouple

Question 18

what method is used to seal polypropylene pipe?

Answer 18

gasket

Question 19

what is the maximum distance between identification labels on a residential copper gas line:

Answer 19

6 feet

Question 20

what is the minimum height a b vent can terminate above a sloped roof with a 16/12 pitch?

Answer 20

6.5 feet

Question 21

what is the minimum distance required between a direct vent and a combustion air hood?

Answer 21

3 feet

Question 22

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

Answer 22

cut, ream, bevel, and mark

Question 23

what schedule pipe is required for liquid propane?

Answer 23

schedule 80

Question 24

what size outlet is required for an unknown future connection with a 1-1/4” pipe size downstream of a regulator?

Answer 24

1-1/4”

FULL SIZE

Question 25

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

Answer 25

As built drawings

Question 26

what is the problem if the furnace high limit continues to activate during a call for heat?

Answer 26

Dirty filter

Question 27

what is the dirt pocket size for a 4000,000 btuh pool heater with a 3" pipe?

Answer 27

2"

Question 28

what is the minimum time required to pressure test 280 feet of gas line operating at 50 psig?

Answer 28

3 hours

Question 29

propane tanks are inspected by?

Answer 29

provincial boiler pressure vessels branch

Question 30

what is the minimum appliance combustible clearance from a source of ignition in a storage garage?

Answer 30

18"

Question 31

when performing combustion analysis on a natural draft gas fired furnace with an output of 325000 BTUH what is the maximum allowable measurement for CO

Answer 31

400 PPM

Question 32

when a final gas line is connected to the appliance, what test is done?

Answer 32

dial test for 10 mins

Question 33

if the fan switch contact(s) do not close during normal operation, which of the following will occur first?

Answer 33

the limit switch will open

Question 34

what is the mass of 1 cubic foot of propane liquid?

Answer 34

31.7 lbs

Question 35

a properly joined threaded connection will have how many exposed threads?

Answer 35

2-3

Question 36

what is the maximum support distance for a 1" horizontal gas line?

Answer 36

8 feet

Question 37

what is the minimum bury depth for type "L" copper tubing?

Answer 37

15 inches

Question 38

What is the recommended method to join polyethylene piping at a temperature below -20 deg C?

Answer 38

electro-fusion

Question 39

how would a partially blocked vent affect the operation of a gas regulator?

Answer 39

slow or sluggish operation

Question 40

what is the symptom of a lifting pilot burner flame?

Answer 40

too much primary air

Question 41

what is the C to C measurement required for an expansion joint for 2" rooftop gas piping?

Answer 41

6.5 feet

Question 42

what is the minimum clearance required from grade to a vent termination below a veranda?

Answer 42

1 foot

Question 43

what is the maximum length of flex connector for a decorative appliance.

Answer 43

2 foot

Question 44

what are the steps used when replacing an oil fired furnace with a natural gas furnace?

Answer 44

remove the furnace, cap the oil line, and remove the storage tank

Question 45

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

Answer 45

in the discharge plenum, downstream of the heat exchanger

Question 46

transformers are sized by:

Answer 46

the VA rating

Question 47

what is required for a steam boiler when installed on a non- combustible floor

Answer 47

level flat surface

Question 48

from the listed materials below, what hazardous material would most likely be a component of older boiler refractory?

Answer 48

asbestos

Question 49

how could a gas fitter determine if a regulator is not a positive shut off type?

Answer 49

downstream pressure increases

Question 50

what is the VA limit for a class 2 transformer

Answer 50

100 va

Question 51

what fitting cannot be used inside a concealed wall?

Answer 51

Union

Question 52

where should a GF install a LWCO on a hydronic heating system?

Answer 52

in the supply or return piping above the boiler

Question 53

which of the following materials can be bent?

Answer 53

soft drawn

Question 54

what must be installed with plastic piping?

Answer 54

a tracer wire ( allows it to be located ) | 14 gauge

Question 55

what is required when converting an appliance from natural gas to propane?

Answer 55

change the information on the rating plate

Question 56

who is responsible to establish and uphold PPE standards?

Answer 56

OH&S

Question 57

what must be done after clocking an appliance and the clocked input exceeds the manufacturer's rating?

Answer 57

lower manifold pressure

Question 58

after the pipe surface has been prepared for electro fusion joining and the virgin surface has been exposed, any surface contamination should be removed with:

Answer 58

70% isopropyl alcohol concentration

Question 59

what colour wire would normally be 24V power?

Answer 59

red

Question 60

how is teflon tape applied?

Answer 60

clockwise direction with 50% overlap leaving 2 starter threads

Question 61

when installing a hydronic heating flow switch in a small diameter piping, what can be done if the shortest sensing paddle is too long to fit in the piping?

Answer 61

trim the paddle to fit

Question 62

prior to electro fusion of joining HDPE the pipe surface should be prepared by using:

Answer 62

an approved rasp tool

Question 63

From the list below, which fitting is prohibited?

Answer 63

Continuous thread

Question 64

what is the set point of a low temp boiler with a cut in temp of 20 deg F

Answer 64

180 deg F

Question 65

what is the noticeable difference between type "BH" and Type "B" vent?

Answer 65

corrosion resistance

Question 66

before entering confine space, what must a GF first check:

Answer 66

proper access and egress

Question 67

the recommended spark gap on an intermittent pilot ignition (IPI) pilot assembly is:

Answer 67

1/8"

Question 68

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

Answer 68

10 feet | AC unit counts as a source of ignition

Question 69

what is the maximuim allowable pressure in a domestic propane gas distribution system?

Answer 69

2 psig

Question 70

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

Answer 70

an 80 MBH direct vent furnace and a 40 MBH heater

Question 71

when is a permit required to be obtained?

Answer 71

when installing a branch run to a new appliance.

Question 72

Pick the tool/s and equipment required to ACCURATELY adjust a regulator. Flat Blade Screwdriver Multi-meter Manometer Thermometer

Answer 72

Flat Blade screwdriver AND Manometer

Question 73

Would the regulators used on the burners in the SAIT gasfitting shop require the vent to be piped outside? Yes No

Answer 73

NO

Question 74

If a regulator vent becomes blocked or restricted, what would be the expected effect on the operation of the regulator? Decrease in outlet pressure Slow / sluggish response to load changes Increased outlet pressure No noticeable effect

Answer 74

Slow / sluggish response to load changes

Question 75

The primary purpose of a regulator is to reduce pressure. True False

Answer 75

True

Question 76

When down-stream gas pressure overcomes the force exerted by the regulator spring, would the gas still be able to flow through the regulator? Yes/No

Answer 76

No

Question 77

When gas flow is stopped completely by the regulator, this is known as; Lock-out Lock-in Lock-out Lock-up

Answer 77

Lock-up

Question 78

How would a ripped or torn regulator diaphragm affect the outlet pressure? Decrease in outlet pressure Increase in outlet pressure No-flow through regulator None of the above

Answer 78

Increase in outlet pressure