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Steamfitting Systems 3 exam BW Portion (30%) > Exam Questions > Flashcards

Exam Questions Flashcards

1
Q

Natural gas is:

A) not a fossil fuel
B) not a member of the hydrocarbon family
C) a product of decomposed, prehistoric animal and plant life
D) a product of animal and plant life

A

C) a product of decomposed, prehistoric, animal and plant life

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2
Q

The ignition temperature of natural gas is:

A) 1100°F
B) 3550°F
C) 1200°F
D) 1000°F

A

1100°F

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3
Q

The flame temperature for natural gas is:

A) 3550°F
B) 1200°F
C) 1100°F
D) 1000°F

A

3550°F

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4
Q

True or false, The upper and lower limits of inflammability of natural gas are 5 to 15%

A

False

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5
Q

True or false, the name of the odorant used to give natural gas to distinct odour is carbon monoxide

A

False

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6
Q

True or false ,Natural gas is heavier than air per cubic foot

A

False

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7
Q

Natural gas contains what percentage of methane:

A) 99%
B) 90%
C) 80%
D) 75%

A

75%

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8
Q

The average house gas line pressure is:

A) 16 O.S.I
B)7” WC
C)28” WC
D)1/2 P.S.I

A

7” WC

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9
Q

The water filled monometer operates under the principle of:

A) a bourdon tube
B) vacuum
C) pressure, displacing a column of water
D) a mercury barometer

A

Pressure displacing a column of water

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10
Q

True or false,C.S.A stands for Canadian safety association

A

False

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11
Q

A factor which affects pressure drop on a gas system is:

A) specific gravity of gas
B) flow rate
C) length of run
D) all of the above

A

All of the above

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12
Q

True or false the main purpose of a gas pressure regulator is to reduce and maintain the upstream inlet pressure at a desired downstream outlet pressure

A

True

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13
Q

The three main components of a gas pressure regulator:

A) diaphragm, valve, vent
B) spring, diaphragm, valve
C) spring, diaphragm, vent
D) spring, screw, valve

A

Spring, diaphragm, valve

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14
Q

The main purpose of a gas metre

A) to measure gas flow
B) to record gas flow
C) to reduce gas pressure
D) both A and b are correct

A

Both a and B are correct

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15
Q

True or false rotary gas metres are used mainly for domestic applications

A

False

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16
Q

True or false regulators must be vented

A

True

17
Q

The terminating point of the vent piping from a regulator is the:

A) combustion chamber
B) outdoors
C) chimney
D) both a and B are correct

A

Both a and B are correct

18
Q

True or false, the two basic types of regulators used in the gas industry are service and appliance

A

True

19
Q

Which direction does spring adjusting screw must be tightened to increase the pressure downstream from the regulator:

A) counterclockwise
B) clockwise
C)opposite
D)same

A

Clockwise

20
Q

A basic instrument used by the gas industry to measure pressure is:

A) a water filled monometer
B) bourdon tube gauge
C)combustion temp/pressure gauge
D) both a and b

A

Both a and b

Steamfitting Systems 3 exam BW Portion (30%) (1 decks)

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