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HVAC Oil Burner Exam: Questions and Answers, Exams of Engineering

A comprehensive set of questions and answers related to hvac oil burner systems. It covers various aspects of oil burner operation, maintenance, and troubleshooting, including fuel oil types, combustion processes, safety devices, and common problems. Suitable for students and professionals seeking to enhance their knowledge of hvac oil burner systems.

Typology: Exams

2024/2025

Available from 11/14/2024

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HVAC OIL BURNER EXAM | QUESTIONS &
ANSWERS (VERIFIED) | LATEST UPDATE |
GRADED A+
An 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
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Download HVAC Oil Burner Exam: Questions and Answers and more Exams Engineering in PDF only on Docsity!

HVAC OIL BURNER EXAM | QUESTIONS &

ANSWERS (VERIFIED) | LATEST UPDATE |

GRADED A+

An 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, 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

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, 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% To perform combustion efficiency test a whole must be made Correct answer: B- In the flue on the furnace side of the draft regulator

Insulated with ceramic material to prevent electrical ground Correct answer: Electrodes 8 gallons of oil how many BTUs would you have Correct answer: 1,020, What color is #2 fuel oil Correct answer: Red What material is in a cad cell that allows it to respond to light Correct answer: Camum sulfide What is the response that a cad cell makes to change in light Correct answer: Produces more resistance less light, less resistance more light What would the symptoms be of a dirty cad cell Correct answer: Burner wouldn't start What would the result of access oil in the combustion chamber be if it were ignited Correct answer: Overfiring What would the symptoms of an open cad cell be Correct answer: Burner would not start

What would cause a cad cell to become dirty Correct answer: Soot What is the pressure at which oil burner nozzles are rated Correct answer: 100 psi Why should fuel oil not be spilled Correct answer: Odor and could start a fire What was the size of the pressure tap in the oil pump for the high-pressure gauge Correct answer: 1/4, 1/8 depending on the unit What was the size of the pressure tap in an oil pump for the low pressure gauge Correct answer: Same as three, 1/4 or 1/ On average, how many BTUs are there in a gallon of fuel oil Correct answer: 140, What is the typical Efficiency conventual oil fired furnace Correct answer: 80% When is a two pipe oil delivery system recommended for an oil burner

What is the typical voltage for an oil fired furnace Correct answer: 115 What is the typical control voltage for an oil fired furnace Correct answer: 24 volts What is the function of the limit control for an oil fired furnace Correct answer: Shut off burner from overheating What is the function of the stack switch on and oil fired furnace Correct answer: Makes sure combustion is taking place What is the function of a cad cell on an oil fired furnace Correct answer: Senses light from the flame Why should you be sure that no oil is left on any part, in addition to its being a possible fire hazard Correct answer: Odor What color of No.2 Fuel oil? Why is it this color Correct answer: Red and taxes What must be done to oil to prepare it to burn

Correct answer: Atomizations Why is the typical oil burner called a "gun type" oil burner Correct answer: Oil is pressurized and forced into a combustion chamber What is the typical pressure at which in oil burner operates Correct answer: 100 psi Is there a strainer in an oil burner nozzle Correct answer: Yes What is the purpose of the tangential slots in an oil burner nozzle Correct answer: Atomize oil, swirl oil, better air oil contact What would happen if too much oil were allowed to enter the combustion chamber and Ignition occurred Correct answer: Burn out of control What should you do in the event you ignited a furnace with too much oil in the combustion chamber Correct answer: Reduce the airflow How long is a furnace allowed to run without ignition