CFESA GAS FINAL EXAM NEWEST 2025 ACTUAL

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CFESA GAS FINAL EXAM NEWEST 2025 ACTUAL

EXAM COMPLETE 100 QUESTIONS AND

CORRECT DETAILED ANSWERS (VERIFIED

ANSWERS) |ALREADY GRADED A+

The minimum incoming gas pressure, before a gas pressure regulator, must be _______.

• The operating pressure rating on the equipment data plate
• Determines by the utility company
• At least 1 in w.c. above the required operating pressure
• At least 5 in w.c. above the required operating pressure -

ANSWER-C

To properly take a gas pressure reading on a piece of gas fired equipment all of the burners ___?

• Should be turned off
• Must be clean
• Must be set to a bypass flame height
• Must be turned full on - ANSWER-D

What is a Manometer and in what units is it calibrated? 1 / 4

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• A pressure gauge calibrated in psi
• A pressure testing instrument calibrated in ft. w.c.
• A pressure testing instrument calibrated in inches w.c.
• A glass tube filled with alcohol to measure gas pressure in psi

- ANSWER-C

An orifice opening in a natural gas orifice is _____ an orifice opening in an LP orifice of the same

rating:

• Smaller than
• Same as
• Larger than
• Varies by manufacturer - ANSWER-C

Clem is out servicing a special processing oven connected to natural gas, and using a hot surface glow coil ignitor. The customer claims that the oven does not heat up very long before it cuts out. Clem has checked the gas pressure under load, the voltage under load, the polarity of the lines, the amp draw of the glow coil, and after removing the glow coil checked its resistance 2 / 4

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which seemed OK. What did Clem do wrong?

• The voltage needed to be checked using only a digital

voltmeter because of the electronics in the circuit

• The gas pressure also needed to be taken without a load
• The polarity could not have had anything to do with the

problem

• The glow coil needed to be ohmed out while it was hot to

show up any possible cracks in the ceramic - ANSWER-C

Joe's diner has a millivolt operated gas fired deep fryer. The pilot goes out from time to time.Sally tech has taken the following reading from the fryer with her meter connected under load.Thermopile output 300 MV with the fryer operating at 350* degrees F. There is no apparent make up or exhaust air problems. The most likely problem is

______.

• A thermopile is breaking down
• The gas valve magnet is breaking down
• The pilot flame is to high 3 / 4

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• The limit thermostat is opening and prematurely breaking the

circuit through the thermopile - ANSWER-A

A Keating fryer has a pilot valve that is locked into the circuit through a mercury vapor switch.The pilot will not stay lit when the momentary switch is released indicating that the mercury switch contacts are not closing. Before changing the switch Joe should do which of the following?

• Make sure that sensor is in the outer most part of the pilot

flame

• Make sure that the tip of the sensor is being heated cherry red

by the pilot flame

• Check to ensure that the gas pressure is not too low
• Make sure that the sensor is positioned away from the direct

pilot flames so that it does not overheat - ANSWER-B

Cliff's seafood restaurant has been closed all day due to a broken gas main in the neighborhood

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