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HVAC OIL BURNER EXAM WITH QUESTIONS AND ANSWERS #12.
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HVAC OIL BURNER EXAM WITH QUESTIONS AND ANSWERS #12An up flow furnace - correct answer Has the return air at the bottom
Of the six regular grades of fuel oil,The grade most commonly used in residential and
light commercial heating systems is No. - correct answer 2
How much heat is produced when 2 gallons of No. 2 fuel oil is burned? - correct answer
280,000
What could be the cause of a high steak temperature - correct answer Too much air
How would you prove a furnace was stopped up with soot in the heat exchanger -
correct answer Draft gauge at the inspection door
What is the function of a heat exchanger - correct answer To exchange the heat from
the combustion
What is the function of the combustion chamber - correct answer Place to burn the fuel
What is the purpose of the restrictor in the blast tube - correct answer To create air
Velocity
What is the difference between a hollow core and a solid core oil nozzle - correct
answer Oil pattern
What is the purpose of the tangential Slots in the nozzle - correct answer Push the oil in
a swirling motion
What must be done to oil to prepare it to burn - correct answer Atomization
What would be the result of a solution where a customer reset the primary control many
times before the service person arrived - correct answer too much oil in the combustion
chamber, Irrupt
What are the symptoms of an oil forced air furnace with a hole in the heat exchanger -
correct answer Soot in the register and odors
What should be done if the initial Smoke reading is zero - correct answer Take back to a
trace of smoke
When hydrocarbon unite rapidly with Oxygen it is called - correct answer Combustion
Assuming perfect combustion how many pounds of oxygen is required to burn 1 pound
a fuel oil - correct answer 3.00LB
, Assuming 50% access air is being provided how many cubic feet of air will be supplied
to and oil burner to burn 1 pound of fuel oil - correct answer 288 cu ft
When fuel oil is broken up to form tiny droplets it is called - correct answer Atomization
The motor on the residential gun type oil burner is usually a blank motor - correct
answer Split face fractional horsepower
The pump on a residential gun type oil burner is a blank pump - correct answer Single
stage or two stage
The fuel oil enters a orifice of the novel through the - correct answer Swirl chamber
The circular direction of the air in the air tube is in blank direction as the fuel oil motion -
correct answer The opposite
The ignition transformer steps up the 120 V residential voltage to approximately blank
V. - correct answer 10,000
The stack switch or relay - correct answer Has hot contacts that close when the
temperature of the fuel pipe rises
A cad cell is a safety device that - correct answer Senses light in the combustion
chamber
A booster pump is often needed when the oil supply tank is blank below the oil burner -
correct answer 15 ft
An oil deaerator - correct answer Allows a one pipe oil delivery system to operate as a
two pipe oil delivery system
A fuel line filter is located between the - correct answer Supply tank and the pump
The heat exchanger in a forced air oil fired furnace - correct answer B- Transfers heat
from the flue gases to the air to be heated and circulated and keep them separate
The condensing oil furnace achieves part of it higher efficiency because of a blank
exchange - correct answer B- Latent heat
Access air is supplied at the burner to ensure that there will be - correct answer B-
Enough oxygen for complete combustion
How much access air is typically supply to the system to ensure that complete
combustion occurs - correct answer 50%
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