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Gas > Gas Fundamentals > Flashcards

Gas Fundamentals Flashcards

1
Q

What did natural gas evolve from

A

Prehistoric plants and animals

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2
Q

Where are most of Canada’s natural gas reserves

A

Western region

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3
Q

Name three things that LPGs are used for

A

Feedstock
Fuel
Processing materials

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4
Q

What is the main fuel gas used today

A

Natural gas

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5
Q

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

A

Sedimentary basins

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6
Q

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

A

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

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7
Q

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

A

False

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8
Q

Name two ways to remove water from gas

A

Absorbtion and adsorption

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9
Q

Name three primary processing systems used in an oil absorption plant

A

Recovery
Rejection
Separation

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10
Q

In cryogenics what causes cooling and condensing of the process gas

A

Pressure reduction

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11
Q

What are the operating pressures for transmission and distribution lines

A

300-1500 psi

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12
Q

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

A

160 ft (48.8m)

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13
Q

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

A

Ethyl mercaptin

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14
Q

What would happen if you burned gas containing sulphur ?

A

Produces acid rain and becomes corrosive

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15
Q

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

A

1ib per 1 million cubic feet

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16
Q

What is the rate at which odorant is added to propane

A

1 litre per 10000 litres

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17
Q

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

A

Downstream

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18
Q

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

A

230ft (70m)

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19
Q

What temperature does natural gas boil

A

-258 degrees F ( -161 degrees C)

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20
Q

How is manufactured gas produced

A

Passing steam over heated coals

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21
Q

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

A

Methane
Butane
Ethane
Propane

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22
Q

Name the essential parts of a fractionation system

A

Tower
Condensor
Reboiler
Reflux equiptment

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23
Q

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

A

5-10 psi

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24
Q

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

A

11-14” WC

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25
Q

What is the gasfitters responsibility on a residential propane distribution system

A

Downstream of the first stage regulator

26
Q

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

A

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

27
Q

What are the three classifications of standatas

A

Information bulletins
Director interpretations
Directors rulings

28
Q

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

29
Q

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

A

Clause 1.2 in scope

30
Q

What section of the code does installers responsibilities fall

31
Q

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

A

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

32
Q

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

33
Q

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

34
Q

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

A

No unless employed or authorized by a utility company

35
Q

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

A

150 volts ac and 1 amp current draw

36
Q

When does B149.1 gas code apply to mobile homes

A

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

37
Q

What is the minimum service clearance for a gas fired appliance

A

2 feet (24”)

38
Q

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

A

6 Feet 4.14.6

39
Q

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

A

18” 450mm

40
Q

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

A

54” (1400 mm)

41
Q

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

A

False unless temporarily approved by safety codes officer

42
Q

Another term for flame speed is?

A

Flame propagation

43
Q

What does MBH stand for

A

Thousands of BTUs per hour

44
Q

What does mmbh stand for

A

Millions of BTUs per hour

45
Q

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

A

60 degrees F (14.7psia)

46
Q

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

47
Q

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

48
Q

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

A

Pressure and temperature

49
Q

Matter can exist in four states, what are they?

A

Solids
Liquids
Vapor’s
Plasma

50
Q

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

51
Q

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?

52
Q

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

A

-44F or -42c

53
Q

When Propane liquid boils it expands to________ times its original volume

54
Q

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

55
Q

One cubic foot of water weighs how many pounds?

56
Q

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

A

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

57
Q

What is the flame temperature for the following gasses

Propane
Natural gas
Butane

A

Propane 3500 degrees F

Natural gas 3350 degrees F

Butane 3450 degrees F

58
Q

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?

A

5% to 15%

2.3 to 9.5%

59
Q

What are the three mandatory items to achieve combustion

A

Heat, fuel, oxygen

60
Q

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

61
Q

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

A

0.005% or 50 parts per million

62
Q

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

Gas (5 decks)

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