G2 Prep Test | Exam Questions with Correct
Answers Rated A+
What is the equivalent length of a NPS 2" Schedule 40, 90* threaded elbow - CORRECT ANSWER
-5.17 Feet
What diameter and length of a dirt pocket is required when a drop line is 3" in diameter -
CORRECT ANSWER -2" diameter/3" long
When sizing a branch line, what is the minimum size of job fabricated welded fitting that can be
used on a NPS 6" gas supply header - CORRECT ANSWER -2" NPS
The instrument used to determine the polarity of an appliance power supply is the - CORRECT
ANSWER -Voltmeter
Direct current travels - CORRECT ANSWER -In one direction
A 120V power supply for a residential electrical circuit is taken from the - CORRECT ANSWER -
Load side of one branch circuit breaker and neutral lug
A hard sharp pilot flame indicates - CORRECT ANSWER -The orifice is too small
Which tool is used to determine if the windings on an electric motor have shorted - CORRECT
ANSWER -Voltmeter
When the voltage has been determined to be approximately 120V, which scale on an analog
meter should be selected for the most accuracy - CORRECT ANSWER -0-125V
, One millivolt is equal to - CORRECT ANSWER -1/1000 volt
When checking a circuit of an unknown voltage using an analog meter with 0-30V, 0-125V, 0-
250V and 0-600V which scale should be selected - CORRECT ANSWER -0-600 V
The 24 V control circuit supply for a residential gas furnace comes from a - CORRECT ANSWER -
120/24 step down transformer
As gauge number of a conductor increases, it's current carrying capacity - CORRECT ANSWER -
Decreases
The instrument used to determine potential difference in an electrical circuit is the - CORRECT
ANSWER -Voltmeter
The open circuit test reading of a thermocouple should be in the range of - CORRECT ANSWER -
25-30 mV
As the diameter of a wire increase, it's resistance - CORRECT ANSWER -decreases
Millivolt wiring should be isolated from line voltage wiring because - CORRECT ANSWER -The
line voltage will induce a voltage into the millivolt wiring
A schematic diagram is used to - CORRECT ANSWER -Indicate how the system works
A thermopile or power pile generates - CORRECT ANSWER -Hundreds of Millivolts (up to 750
mV)
An operating aqua stat is what type of control - CORRECT ANSWER -Normally closed
Answers Rated A+
What is the equivalent length of a NPS 2" Schedule 40, 90* threaded elbow - CORRECT ANSWER
-5.17 Feet
What diameter and length of a dirt pocket is required when a drop line is 3" in diameter -
CORRECT ANSWER -2" diameter/3" long
When sizing a branch line, what is the minimum size of job fabricated welded fitting that can be
used on a NPS 6" gas supply header - CORRECT ANSWER -2" NPS
The instrument used to determine the polarity of an appliance power supply is the - CORRECT
ANSWER -Voltmeter
Direct current travels - CORRECT ANSWER -In one direction
A 120V power supply for a residential electrical circuit is taken from the - CORRECT ANSWER -
Load side of one branch circuit breaker and neutral lug
A hard sharp pilot flame indicates - CORRECT ANSWER -The orifice is too small
Which tool is used to determine if the windings on an electric motor have shorted - CORRECT
ANSWER -Voltmeter
When the voltage has been determined to be approximately 120V, which scale on an analog
meter should be selected for the most accuracy - CORRECT ANSWER -0-125V
, One millivolt is equal to - CORRECT ANSWER -1/1000 volt
When checking a circuit of an unknown voltage using an analog meter with 0-30V, 0-125V, 0-
250V and 0-600V which scale should be selected - CORRECT ANSWER -0-600 V
The 24 V control circuit supply for a residential gas furnace comes from a - CORRECT ANSWER -
120/24 step down transformer
As gauge number of a conductor increases, it's current carrying capacity - CORRECT ANSWER -
Decreases
The instrument used to determine potential difference in an electrical circuit is the - CORRECT
ANSWER -Voltmeter
The open circuit test reading of a thermocouple should be in the range of - CORRECT ANSWER -
25-30 mV
As the diameter of a wire increase, it's resistance - CORRECT ANSWER -decreases
Millivolt wiring should be isolated from line voltage wiring because - CORRECT ANSWER -The
line voltage will induce a voltage into the millivolt wiring
A schematic diagram is used to - CORRECT ANSWER -Indicate how the system works
A thermopile or power pile generates - CORRECT ANSWER -Hundreds of Millivolts (up to 750
mV)
An operating aqua stat is what type of control - CORRECT ANSWER -Normally closed
