GAS CFESA EXAM LATEST
The no load output of a thermopile is normally ________ millivolts.
A) 30-40
B) 100-250
C) 600-750
D) 1000+ - ANSWERS-C
Thermocouples tend to have low outputs when used in extremely hot
ambient conditions
because _______.
A) The voltage generated by a thermocouple is proportional to the
difference between the
temperatures of the hot and cold junction
B) Heat reduces voltage in any application
C) Heat breaks down the electrical connections in the thermocouple
D) This is not a true statement - ANSWERS-A
Over tightening a thermocouple can break the connection on the end of
it. The proper tightness
is ___________.
A) Tight with a wrench
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1
, GAS CFESA EXAM LATEST
B) Finger tight, and then another quarter of a turn
C) Finger tight
D) Finger tight plus one full turn - ANSWERS-B
In a pizza deck oven application using a safety valve and thermocouple,
what is special about the
thermocouple that must be used?
A) It must have a higher millivolt output
B) It must have a thicker tip to work in the extreme heat
C) It must be armored with special shielding to protect it from the
extreme heat
D) Nothing, a standard thermocouple usually works fine - ANSWERS-C
The minimum safe performance of a venting system shall be designed
and constructed as to
develop a ________ flow adequate to remove flue or vent gases to the
outside atmosphere.
A) Negative
B) Restricted
C) Positive
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, GAS CFESA EXAM LATEST
D) Slow - ANSWERS-A
The ignition module for an electronic ignition system on equipment
using LP gas must be 100%
lockout. This means that __________.
A) The module can only try to fire one more time if it locks out
B) The module can only try to fire one time
C) The power to the gas valve can never exceed the rated voltage
without locking out
D) The module can try to re-fire as many times as necessary as long as
the ignition time does
not exceed the lockout time - ANSWERS-B
A line voltage module for an electronic ignition system is usually
sensitive to ___________.
A) Poor harmonics in the electric supply
B) Polarity of neutral and hot lines
C) Low voltage spikes
D) Overheating step down transformers - ANSWERS-B
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PAGE
3
, GAS CFESA EXAM LATEST
Flame sensor current in an electronic ignition is measured in
__________.
A) AC amps
B) DC milliamps
C) DC microamps
D) AC milliamps - ANSWERS-C
In order for an electronic spark ignition system to function properly the
flame sensor must be
positioned ________.
A) In the darker blue part of the flame
B) 1/8" from the burner
C) In the light blue, hottest part of the flame
D) 1/16" gap form the burner - ANSWERS-C
How can an ignition module tell the difference between a proven flame
and a shorted flame
sensor?
A) A shorted sensor conducts DC current and a flame sensor conducts
AC current
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PAGE
4
The no load output of a thermopile is normally ________ millivolts.
A) 30-40
B) 100-250
C) 600-750
D) 1000+ - ANSWERS-C
Thermocouples tend to have low outputs when used in extremely hot
ambient conditions
because _______.
A) The voltage generated by a thermocouple is proportional to the
difference between the
temperatures of the hot and cold junction
B) Heat reduces voltage in any application
C) Heat breaks down the electrical connections in the thermocouple
D) This is not a true statement - ANSWERS-A
Over tightening a thermocouple can break the connection on the end of
it. The proper tightness
is ___________.
A) Tight with a wrench
END OF
PAGE
1
, GAS CFESA EXAM LATEST
B) Finger tight, and then another quarter of a turn
C) Finger tight
D) Finger tight plus one full turn - ANSWERS-B
In a pizza deck oven application using a safety valve and thermocouple,
what is special about the
thermocouple that must be used?
A) It must have a higher millivolt output
B) It must have a thicker tip to work in the extreme heat
C) It must be armored with special shielding to protect it from the
extreme heat
D) Nothing, a standard thermocouple usually works fine - ANSWERS-C
The minimum safe performance of a venting system shall be designed
and constructed as to
develop a ________ flow adequate to remove flue or vent gases to the
outside atmosphere.
A) Negative
B) Restricted
C) Positive
END OF
PAGE
2
, GAS CFESA EXAM LATEST
D) Slow - ANSWERS-A
The ignition module for an electronic ignition system on equipment
using LP gas must be 100%
lockout. This means that __________.
A) The module can only try to fire one more time if it locks out
B) The module can only try to fire one time
C) The power to the gas valve can never exceed the rated voltage
without locking out
D) The module can try to re-fire as many times as necessary as long as
the ignition time does
not exceed the lockout time - ANSWERS-B
A line voltage module for an electronic ignition system is usually
sensitive to ___________.
A) Poor harmonics in the electric supply
B) Polarity of neutral and hot lines
C) Low voltage spikes
D) Overheating step down transformers - ANSWERS-B
END OF
PAGE
3
, GAS CFESA EXAM LATEST
Flame sensor current in an electronic ignition is measured in
__________.
A) AC amps
B) DC milliamps
C) DC microamps
D) AC milliamps - ANSWERS-C
In order for an electronic spark ignition system to function properly the
flame sensor must be
positioned ________.
A) In the darker blue part of the flame
B) 1/8" from the burner
C) In the light blue, hottest part of the flame
D) 1/16" gap form the burner - ANSWERS-C
How can an ignition module tell the difference between a proven flame
and a shorted flame
sensor?
A) A shorted sensor conducts DC current and a flame sensor conducts
AC current
END OF
PAGE
4
