Gas Fundamentals

Question 1

What did natural gas evolve from

Answer 1

Prehistoric plants and animals

Question 2

Where are most of Canada’s natural gas reserves

Answer 2

Western region

Question 3

Name three things that LPGs are used for

Answer 3

Feedstock
Fuel
Processing materials

Question 4

What is the main fuel gas used today

Answer 4

Natural gas

Question 5

Exploration for oil and gas is conducted in areas known as?

Answer 5

Sedimentary basins

Question 6

What are three methods of identifying drilling sites for oil and gas ?

Answer 6

Aerial photography, magnetometer, and gravity surveys
Surface studies of rock outcroppings
Seismography

Question 7

Finding oil and gas is always guranteed using the methods they use?
True or false

Answer 7

False

Question 8

Name two ways to remove water from gas

Answer 8

Absorbtion and adsorption

Question 9

Name three primary processing systems used in an oil absorption plant

Answer 9

Recovery
Rejection
Separation

Question 10

In cryogenics what causes cooling and condensing of the process gas

Answer 10

Pressure reduction

Question 11

What are the operating pressures for transmission and distribution lines

Answer 11

300-1500 psi

Question 12

What is the approximate height that aircraft’s fly at to monitor pipelines

Answer 12

160 ft (48.8m)

Question 13

What is the name of the odorant that is added to natural gas

Answer 13

Ethyl mercaptin

Question 14

What would happen if you burned gas containing sulphur ?

Answer 14

Produces acid rain and becomes corrosive

Question 15

What is the rate at which odorant is added to natural gas

Answer 15

1ib per 1 million cubic feet

Question 16

What is the rate at which odorant is added to propane

Answer 16

1 litre per 10000 litres

Question 17

As a gasfitter your responsibility lies upstream or downstream of the meter

Answer 17

Downstream

Question 18

What is the approximate diameter of the salt caverns located just outside of fort sask

Answer 18

230ft (70m)

Question 19

What temperature does natural gas boil

Answer 19

-258 degrees F ( -161 degrees C)

Question 20

How is manufactured gas produced

Answer 20

Passing steam over heated coals

Question 21

Name for LPGs that can be obtained from oil and gas wells

Answer 21

Methane
Butane
Ethane
Propane

Question 22

Name the essential parts of a fractionation system

Answer 22

Tower
Condensor
Reboiler
Reflux equiptment

Question 23

What is the setting of a high pressure regulator for a residential propane distribution system

Answer 23

5-10 psi

Question 24

What is the setting of a low pressure regulator for a residential propane distribution system

Answer 24

11-14” WC

Question 25

What is the gasfitters responsibility on a residential propane distribution system

Answer 25

Downstream of the first stage regulator

Question 26

What are the three fundamentals of safety that the code book addresses

Answer 26

Prevent explosion due to escape of gas Prevent overheating of combustible portions of the building Prevent the escape of noxious or hazardous combustion products into occupied quarters

Question 27

What are the three classifications of standatas

Answer 27

Information bulletins Director interpretations Directors rulings

Question 28

How many annex’s are in the B149.1 code book

Answer 28

9

Question 29

What clause in the code book references where the code does not apply

Answer 29

Clause 1.2 in scope

Question 30

What section of the code does installers responsibilities fall

Answer 30

Section 4

Question 31

If the manufactures certified installation instructions conflict with the code which one shall prevail

Answer 31

The code shall prevail unless the installer has written approval from the authority having jurisdiction (SCO)

Question 32

The last person who works on a gas fired appliance is considered the installer True or false

Answer 32

True

Question 33

When converting an appliance, you must inform the owner in writing on how to avoid activating former fuel True or false

Answer 33

True

Question 34

It is part of your job to work on and service gas meters and service regulator for natural gas ?

Answer 34

No unless employed or authorized by a utility company

Question 35

What is the maximum voltage of electrical components you can work on as a class b gasfitter

Answer 35

150 volts ac and 1 amp current draw

Question 36

When does B149.1 gas code apply to mobile homes

Answer 36

When it is on a permanent foundation or has structural alterations that would no longer class it as mobile

Question 37

What is the minimum service clearance for a gas fired appliance

Answer 37

2 feet (24”)

Question 38

What is the clearance between an appliance and the edge of a roof

Answer 38

6 Feet 4.14.6

Question 39

What is the clearance off the ground for an appliance installed in a residential or storage garage

Answer 39

18” 450mm

Question 40

What is the clearance off the ground for an appliance installed in a repair garage

Answer 40

54” (1400 mm)

Question 41

Residential heat exchangers that are defective can be repaired true or false ?

Answer 41

False unless temporarily approved by safety codes officer

Question 42

Another term for flame speed is?

Answer 42

Flame propagation

Question 43

What does MBH stand for

Answer 43

Thousands of BTUs per hour

Question 44

What does mmbh stand for

Answer 44

Millions of BTUs per hour

Question 45

What is the standard temperature and pressure for which comparisons are made

Answer 45

60 degrees F (14.7psia)

Question 46

A mixture is two or more types of atoms in solution without a definite ratio. True or False?

Answer 46

True

Question 47

Natural gas, also known as methane, it is made of carbon and hydrogen in every molecule. What is the chemical formula?

Answer 47

CH4

Question 48

There are two factors that influence the state in which matter exists, they are?

Answer 48

Pressure and temperature

Question 49

Matter can exist in four states, what are they?

Answer 49

Solids Liquids Vapor’s Plasma

Question 50

It can be proven that when subjected to a higher pressure the boiling point of water decreases. True or False?

Answer 50

False

Question 51

Natural gas is not an LPG because it requires an extremely low temperature or an excessively high pressure to cause it to turn to a liquid. True or False?

Answer 51

True

Question 52

At what temperature does propane change from a liquid to a vapour?

Answer 52

-44F or -42c

Question 53

When Propane liquid boils it expands to________ times its original volume

Answer 53

270

Question 54

If one imperial gallon (imp gal) of water was weighed it would be how many pounds

Answer 54

10 pounds

Question 55

One cubic foot of water weighs how many pounds?

Answer 55

62.4

Question 56

How many Btu’s are required to raise the temperature of 110 lbs of water 120° F?

Answer 56

Mass x Specific heat x Delta T 110 x 1 x 120 = 13’200 BTU’s

Question 57

What is the flame temperature for the following gasses Propane Natural gas Butane

Answer 57

Propane 3500 degrees F Natural gas 3350 degrees F Butane 3450 degrees F

Question 58

The range of flammability is based on an air/gas mixture in which the air consists of approximately 20% oxygen, 80% nitrogen and other gases, what are the limits of Natural Gas? What about propane?

Answer 58

5% to 15% 2.3 to 9.5%

Question 59

What are the three mandatory items to achieve combustion

Answer 59

Heat, fuel, oxygen

Question 60

A reduced yellow flame is an indication of not enough _______________ air.

Answer 60

Primary

Question 61

What percentage of Carbon Monoxide in air is allowable for an exposure of 8 hours?

Answer 61

0.005% or 50 parts per million

Question 62

What is the liquefaction ratio (cubic feet/gal) for Commercial Propane?

Answer 62

43.6