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G2 PRACTICE EXAM #2 QUESTIONS AND ANSWERS 2024
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G2 PRACTICE EXAM #2 QUESTIONS AND ANSWERS 2024
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G2 PRACTICE EXAM #2A condensing warm air furnace has?
A. Operates without a heat exchanger.
B. One heat exchanger.
C. Three heat exchangers.
D. Two heat exchangers. - ANSWERS-D. Two heat exchangers.
What is the maximum high limit setting for a gravity furnace?
A. 150F
B. 200F
C. 250F
D. 350F - ANSWERS-D. 350F
How far should a vent terminate from a window if the appliance firing rate is 65
000 BTU?
A. 6"
B. 10"
C. 12"
D. 36" - ANSWERS-C. 12"
An appliance should not exceed the rated input less than?
,A. 80%
B. 75%
C. 25%
D. 90% - ANSWERS-D. 90%
Should a high pressure leak test be performed if a section of more than 20 feet is
added to a existing gas piping system?
A. Yes
B. No
C. Soap test only
D. Dial and soap test - ANSWERS-A. Yes
What is the closing force of a 2' gas regulator?
A. Spring tension
B. Operating pressure
C. Downstream pressure
D. Leak limit orifice - ANSWERS-C. Downstream pressure
A scotch marine boiler is what type of boiler?
A. Two pass boiler.
B. Copper tube boiler.
C. Fire tube boiler.
,D. Four pass water tube boiler. - ANSWERS-C. Fire tube boiler.
In what section of the B149.1 code book can you find specs on a dirt pocket?
A. Section #2
B. Section #5
C. Section #4
D. Section #6 - ANSWERS-D. Section #6
What would be the minimum area needed to service a appliance?
A. 24" x 18"
B. 24" x 24"
C. 36" x 36"
D. 36" x 48 - ANSWERS-B. 24" x 24"
Can a 2 " diameter round duct be used as combustion supply air to an appliance?
A. Yes.
B. Yes if total input of appliances exceed 400,000 BTU.
C. Yes if ventilation air is at least 10 in square.
D. No. - ANSWERS-D. No.
If condensation occurs on the inside of the window when the outdoor
temperature drops, The humidistat should be?
, A. Increased.
B. Set to Zero.
C. Set to 100%.
D. Decreased. - ANSWERS-D. Decreased.
129) A fan control:
A. Starts and stops the blower.
B. Starts the blower when the plenum is up to temperature.
C. Ensure the burner will not start if overheating occurs.
D. Shuts the blower off on safety only. - ANSWERS-A. Starts and stops the blower.
An adjustable sheave pulley is most commonly used on a:
A. Motor shaft.
B. Variable speed motor.
C. Blower shaft.
D. Direct drive motor. - ANSWERS-A. Motor shaft.
What is the minimum diameter of a pressure gauge needed to perform leak test
on gas piping?
A. 2"
B. 2 - 3/4"
C. 3"
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