Test Questions

Question 1

What is the most common pilot burner?

Answer 1

Post aerated

Question 2

Most common material used for gas lines?

Answer 2

Sch 40 black iron

Question 3

How much should a thermo couple in compass the pilot flame?

Answer 3

3/8-1/2”

Question 4

High limit is a normally closed switch ?
T/F

Answer 4

True

Question 5

How do you reverse a belt driven motor?

Answer 5

Reverse wires behind cover plate

Question 6

Where can you find the setting on a heat anticipator?

Answer 6

Stamped on the gas valve

Question 7

How are boilers rated?

Answer 7

BTUH or EDR

Question 8

What can cause damage to coppers cooler in boiler?

Answer 8

Little or no water in the boiler

Question 9

What are the different types of low water cutoffs?

Answer 9

Float and probe type

Question 10

How is the operating/ limit control wired in boiler?

Answer 10

Series and series

Question 11

How do you select a gauge for hydrostatic pressure?

Answer 11

Dial indicating pressure

Question 12

If paddles are to big on a flow switch what do you do ?

Answer 12

Trim them

Question 13

How do you calculate thread engagement ?

Answer 13

Amount of pipe ADDED to face to face measurement

Question 14

Material that can be flared and used as a flare fitting

Answer 14

Copper TUBING

Question 15

Shut off valve must be installed in conjunction with what?

Answer 15

Regulator

Question 16

Gas pressure closes 2 stage regulator?
True/ false

Answer 16

True

Question 17

What will happen to a diaphragm gas valve if the relief port is blocked?

Answer 17

Gas valve will remain closed

Question 18

What position will the actuator in a diaphragm gas valve end up if the diaphragm ruptures?

Answer 18

Remains open if there’s pressure

Question 19

What are you testing with a dropout test?

Answer 19

Testing when the plunger is released by electro magnet

Question 20

What happens when a furnace doesn’t sense flame?

Answer 20

Lockout occurs

Question 21

What happens when the control board is locked out?

Answer 21

De energizes gas valve and pilot system.

Question 22

What the ground rod compared to flame rod ratio?

Answer 22

4:1

Question 23

What’s the minimum spark gap?

Answer 23

1/8”

Question 24

How long does HSI take to heat up

Answer 24

17-34seconds

Question 25

Watts equal what?

Answer 25

Watts = V x A Power = I x E

Question 26

If a transformer keeps burning out what do you do?

Answer 26

Upsize to

Question 27

How are transformers measured?

Answer 27

VA

Question 28

Short circuit is what?

Answer 28

Two loads in series

Question 29

What is continuity?

Answer 29

Continuous electrical path in a circuit

Question 30

What is a series circuit?

Answer 30

Single path for power to reach components

Question 31

What is a parallel circuit ?

Answer 31

Multiple paths for power to reach components

Question 32

Heat travels from?

Answer 32

Hot - cold

Question 33

Mercury relative density is what ?

Answer 33

13.6

Question 34

Sensible heat is ?

Answer 34

Heat that can be measured with a thermometer

Question 35

Latent heat?

Answer 35

Amount of heat required to change the state of a substance

Question 36

1cuft of Natural gas requires how much air to burn

Answer 36

10 cuft

Question 37

1 cuft of propane requires ?

Answer 37

24cuft

Question 38

When did rural communities start using natural gas ?

Answer 38

1970s

Question 39

What is the heating value of ch4

Answer 39

1000 BTU’s

Question 40

High pressure switch is for what?

Answer 40

Prevent over-firing

Question 41

Where can you find regulations governing gas installs?

Answer 41

B149.1

Question 42

What’s the max btus a class b gas’s fitter can work on ?

Answer 42

400,000 and under

Question 43

If the standard info, bulletins have been posted what should be done next?

Answer 43

The recommendations

Question 44

3 common uses of natural gas?

Answer 44

Cooking, domestic water heating and heating

Question 45

Standard pressure ( STP) is taken at what?

Answer 45

60F and 14.7 PSIA

Question 46

Propane gas detector should be located where?

Answer 46

Close to the floor as possible

Question 47

Specific gravity is what ?

Answer 47

Density of a substance relative to that standard

Question 48

What has the highest ignition temperature?

Answer 48

Natural gas

Question 49

Calculate density of a substance =

Answer 49

Weight + Volume

Question 50

Min distance of a gas appliance in storage garage?

Answer 50

18” (450mm)

Question 51

Sour gas contains an odour called?

Answer 51

Hydrogen sulfide

Question 52

1 cuft of water = 1 US GAL=

Answer 52

62.4lbs 8.33lbs

Question 53

What are solids liquids and gases compared to?

Answer 53

Solids liquids are compared to water Gas is compared to Air

Question 54

What are the 2 things that affect pressure?

Answer 54

Height and density P= HEIGHT x Density

Question 55

Force =

Answer 55

Area x Pressure

Question 56

What is a BTU

Answer 56

Amount of heat required to change 1lb of water 1 degree Fahrenheit

Question 57

How many PPM of carbon monoxide can you be exposed to for 8 hours?

Answer 57

.005 PPM

Question 58

What type of valve is used on a propane tank for liquid withdrawal?

Answer 58

Excess flow valve

Question 59

All propane cylinders must have?

Answer 59

A cap

Question 60

What percent of volume are propane tanks filled at?

Answer 60

80%

Question 61

What is a specific heat of water?

Answer 61

1

Question 62

What’s specific heat of steam and ice?

Answer 62

.5

Question 63

How do you calculate vaporization BTU?

Answer 63

Cylinder diameter x Cylinder height

Question 64

Excess flow valve permits what?

Answer 64

Flow of liquid or gas

Question 65

Max supports for horizontal propane tanks?

Answer 65

2 supports max

Question 66

How far do 1000 -2000 gal propane tanks have to be away from a building?

Answer 66

25ft

Question 67

How far apart to two propane tanks have to be from each other?

Answer 67

3ft (1m)

Question 68

Calculate pressure drop

Answer 68

Standing pressure - operating pressure

Question 69

What’s the max flex connector length for a gas range ?

Answer 69

6ft for unvented appliances (gas range is unvented ) 2ft for vented appliances

Question 70

How much pressure drop is allowed when pressure testing?

Answer 70

No pressure drop is allowed when testing.

Question 71

How do you install regulators ?

Answer 71

Vents pointing down

Question 72

What percentage of pressure drop is on a 2psi gas line ?

Answer 72

75%