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UNIT 32 OIL HEAT EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+, Exams of Engineering

Carroll Community CollegeEngineering

How many grades of fuel oil are normally considered as heating oils. Correct answer: There are six What two elements make up fuel oil Correct answer: Carbon and Hydrogen The most common fuel oil used for residential and light commercial is? Correct answer: Number two As the temperature of an oil sample decreases; Correct answer: The viscosity of the oil increases If oil is to be stored at temperatures lower than 20 degrees F. Correct answer: The viscosity will be thicker

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UNIT 32 OIL HEAT EXAM | QUESTIONS &
ANSWERS (VERIFIED) | LATEST UPDATE |
GRADED A+
How many grades of fuel oil are normally considered as heating oils.
Correct answer: There are six
What two elements make up fuel oil
Correct answer: Carbon and Hydrogen
The most common fuel oil used for residential and light commercial is?
Correct answer: Number two
As the temperature of an oil sample decreases;
Correct answer: The viscosity of the oil increases
If oil is to be stored at temperatures lower than 20 degrees F.
Correct answer: The viscosity will be thicker.
Explain why periodic oil tank inspection is desired:
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Download UNIT 32 OIL HEAT EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ and more Exams Engineering in PDF only on Docsity!

UNIT 32 OIL HEAT EXAM | QUESTIONS &

ANSWERS (VERIFIED) | LATEST UPDATE |

GRADED A+

How many grades of fuel oil are normally considered as heating oils. Correct answer: There are six What two elements make up fuel oil Correct answer: Carbon and Hydrogen The most common fuel oil used for residential and light commercial is? Correct answer: Number two As the temperature of an oil sample decreases; Correct answer: The viscosity of the oil increases If oil is to be stored at temperatures lower than 20 degrees F. Correct answer: The viscosity will be thicker. Explain why periodic oil tank inspection is desired:

Correct answer: To ensure that the tank is free of leaks and that the protective anodes are in good working conditions. If it is expected that an oil-fired appliance will burn 850 gallons of oil per year, how big the oil storage be? Correct answer: 275 gallons. How many pounds of oxygen are required to burn 1 pound of Number two fuel? Correct answer: 3 Lbs of oxygen Explain the concept of excess air when it is used to describe the combustion process; Correct answer: Most oil burners are set up to burn with appoximately 50 % Excess air. When 1Lb of oil with 50% excess air is burned 21.6 lbs. or 288 CuFt. of air must be furnished. Before fuel oil can be burned, it must be Correct answer: Automized What product of combustion are produced with ideal combustion when fuel oil is burned? Correct answer: Heat, Carbon-dioxide and water vapor.

Correct answer: To provide high voltage to the electrodes that produces the spark for ignition. Explain the differences between an ignition transformer and a solid-state igniter: Correct answer: The ignition transformer, is a step up transformer that produces 10,000 to 14,000 volts. The solid state igniter is lighter as the out-put voltage is by state circuit that produces 14,000 to 24,000 volts. List the advange a solid state igniter has over an ignition transformer: Correct answer: - Higher voltage at the out-put results in faster vaporization and ignition.

  • Solid state igniters are not greatly affected by a drop in supply voltage.
  • Solid state igniters use less electricity than ignition transformers do. Which of the followin is the typical out-put voltage of the ignition transformer? Correct answer: 10,000 volts What are the two functions of the primary control on an oil burner? Correct answer: First, it provides the means for operating the unit, Its second function is that of safety. List the two types of primary controls that are commonly found on oil-fire heating equipments:

Correct answer: Stack relay and CAD relay. Describe the operation of a stack relay: Correct answer: This device is a heat sensing component and is wired to shut down the burnere if it deos not detect heat in the stack. Explain the difference between the hot contacts and the cold contacts on a stack relay; Correct answer: The contacts that are in the closed position when the flue pipe is cold, are referred to as the cold contacts. Those that are closed position when the flue pipe is hot are referred to as the hot contacts. The purpose of the CAD cell in an oil burner control is to: Correct answer: Sense the light that is produced when the air oil mixture is ignited. Explain why is important to keep the CAD cell clean at all times: Correct answer: A dirty CAD cell relay may lead to operational problems with the burner. A one pipe system may be used when the oil tank is higher or lower than the oil pump: Correct answer: True Describe where a two-pipe system is used: