V/I/R & Generic Number Exam
Questions and Answers 100%
PASS
15 seconds—ANSWER-When burning over 3 GPH, the lockout time must be
150v to ground—ANSWER-What is the maximum voltage for the oil burner
control?
14 Gauge—ANSWER-What is the minimum wire size that can be used for
line voltage to an oil burner?
15 amps—ANSWER-What size fuse is needed for the oil burner
15 seconds—ANSWER-What must the flame failure response time be for
burners over 7 GPH
4 mesh—ANSWER-What is the rule about approved weather caps in regards
to screens
15 seconds—ANSWER-What is the safety timing for a gas piloted ignition?
165° F—ANSWER-At what temperature must the thermal switch activate?
, 75%—ANSWER-The free area of a metal louver if not known is to be
calculated at
3—ANSWER-How many screws are required on a chimney connector joint?
24 Gauge—ANSWER-What is the gauge thickness of a 6 inch chimney
connector
6 inch—ANSWER-What size connector will be used with a burner firing 1
gallon of oil
500° F—ANSWER-What is the minimum melting point of solder on oil line
3450 rpm—ANSWER-What is the speed of a high speed oil pump
10-12%—ANSWER-What is a good CO2 number
100 psi—ANSWER-The gallons per hour rating on an oil nozzle is based on
what pressure
15 psig—ANSWER-Low pressure steam boilers will generate a steam
pressure not in excess of
80%—ANSWER-In forced warm air systems the returned duct size must
never be less than what percent of the supply duct
350° F—ANSWER-To avoid condensing in the flu pipe of an oil fire
appliance, you should have a minimum gross stack temperature of
300-1000 ohms—ANSWER-The normal CAD cell resistance when the burner
is running
120v—ANSWER-Normal Ignition transformer primary voltage
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