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61 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)

Smelly part of incomplete combustion?

Aldehydes

Also stings the eyes

Definition of calorific value?

BTUs contained in a specific volume (ft3) of fuel gas

Chemical formula for gas and propane?

Ch4 and c3h8

Specific gravity of natural GAS and propane GAS?

0.6 and 1.5

Calorific value of natural GAS and propane GAS? (Btu/ft3

1000 and 2500

How many times does natural gas and propane expand?

580 and 270

How many times does natural gas and propane gas contract?

96 and 43.6

Calorific value of LIQUID nat gas and propane (btu/ imp. Gal.)

96,000 and 109,500

Specific gravity of LIQUID Nat gas and propane?

0.424 and 0.51

Boiling points of Nat gas and propane??

-258 and -44

Range of flammability of Nat gas and propane?

5-15% and 2.3-9.5%

Approximate flame speeds of Nat gas and propane?

26 and 32

Ignition temperature of Nat gas and propane?

1200 and 950

Flame temp of Nat gas and propane?

3,350 and 3500

Combustion air for Nat gas and propane?

10 and 24

Nat gas and propane Gas supply pressure (“W.C.)

7 and 11

How to get from “/W.C. To oz/in2?

X .578

What created hydrocarbons?

Ancient dead organic matter

What’s an LPG?

Liquid petroleum gas. Can exist as a liquid under realistic pressure

What is the flammable and most common component of Nat gas?

Methane

Limitations of gas B?

400,000 btu

Process used to locate oil and gas?

Seismology

What’s sweet gas?

Gas free of hydrogen sulfide

Where are distribution lines?

From city gate to customers meter

Where is the gas fitters responsibility in relation to the meter?

Downstream

What are the function of salt caverns?

To store Nat gas

What fuel is stored as a liquid but used as a gas?

Propane

What’s the odorant added to gas?

Mercaptan

Pressure setting on FIRST STAGE reg on a permanent propane system?

5-10 psi

What’s the CODEBOOK for Nat gas and propane?

149.1

What’s the role of safety codes officer?

To inspect

Who’s responsible for admin of gas regulations?

Alberta municipal affairs

Whats a hydrocarbon?

A molecule of water and carbon

What’s 3 things are needed for combustion?

Fuel, oxygen, and heat

What’s combustion?

Rapid oxidation producing heat and light

What IS NOT a product of good combustion?

Carbon monoxide

What is soot?

Carbon deposits

What is theoretical combustion air?

Primary and secondary air only

What’s uncontrolled combustion?

An explosion

What’s the part of a gas reg that lets atmospheric housing

Vent port

Name the part of the regulator that determines the max capacity of gas that can pass through?

The restricting element. (Spring or weight)

Max gas pressure allowed in family home?

2 psi

What device is used when hole is drilled for the orifice is too big?

Adapter

What’s high altitude?

2000’-4500’

How to de-rate above high altitude?

4% for every 1000’ above high altitude

What direction should an orifice be drilled?

Direction of the gas

What size to drill orifice by hand?

Two sizes smaller

Why is it important to ensure the rating plate is attached?

Make sure the firing rate and supply pressures are according to spec

How to determine max firing rate?

Rating plate, INPUT

Why check the manifold pressure on the rating plate?

To regulate the correct amount of gas in the burner

What type of burner is blue?

Bensen

What device controls primary air?

Primary air shutter

Difference between inshore and upshot burner?

Direction the FLAMES TRAVEL

Which burner has no primary air openings?

Non- aerated burner

What appliances need which flame types?


Hw heater


Range top


Furnace

Hw heater is neutral,


Range top is oxidizing


A furnace is carbonizing

What cause flame lift off?

The gas mixture speed is LOWER than flame speed

What meter is most commonly found on residential?

Positive displacement meter. Four chambers

Which dial is used to clock gas meter because it’s directly driven?

Proving dual

Why is a gas meter clocked?

Check consumption of appliances

What is needed on meters outside that aren’t needed inside?

Temperature connection device

Formula for checking consumption?

(Proving dial/seconds) X3600 Xfeet cubed an hour