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Exam (elaborations)
Chapter 6 to 12 OBT3 Test Questions Fully Solved.
fuel oil is a member of the __________ family of chemical compounds - Answer hydrocarbon approximately 96% to 99.75% of the fuel oil is composed of: a) methane and propane b)sulphur, oxygen and nitrogen c) hydrogen and carbon d)manufactured oil - Answer c) hydrogen and carbon that two general categories of refined fuel oils are: a) distillates and residuals b)light and dark c)natural and manufactured d)cracked and uncracked - Answer a) distillates and residua...
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Exam (elaborations)
OBT 3 Questions and All Correct Answers.
Popular1 You must never use a chisel with a ______ head. - Answer mushroomed 3. A ____ wrench is better suited to loosening tight nuts. - Answer box 4. Name three types of snips: - Answer Straight snips combinations snips Compound snips Name three types of pliers: - Answer needle nose side cutters channel locks 5. A masonry drill bit is suited for drilling into concrete due to its _____ tip. - Answer carbide 6.____ hammers are best suited for striking chisels...
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Exam (elaborations)
Oil tech test Questions and All Correct Answers 2026 Updated.
whats a good definition for viscosity - Answer viscosity is resistance to flow whats the flash point of number 2 heating fuel - Answer 115 degrees whats the pour point of number 2 heating fuel - Answer 17 degress Fahrenheit what is a btu - Answer the amount of energy to raise one pound of water one degree fairenheit choose the formula used to determine the cubic foot of air required for proper combustion - Answer GPHx1540x 1.25 = what would u do if you ha...
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Exam (elaborations)
OIL HEAT Questions and All Correct Answers.
The oil-fired, forced-warm-air furnace has two main systems: Which are... - Answer Heat-producing system and heat-distributing system What is the heat-producing system? - Answer consists of the oil burner, fuel supply components, combustion chamber, and heat exchanger. What is the heat-distribution system? - Answer composed of the blower, which moves the air through the ductwork, and other related components After the thermostat calls for heat, what happens? - Answer ...
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Exam (elaborations)
OBT3- Chapter 14 Questions and Already Passed Answers 2026-2027 Updated.
Which of the following statements is correct? Pressure is defined as: a) Weight per cubic foot. b) Force (as measured by weight) exerted against known area. c) Force (as measured by weight) exerted against known volume. d) All of the listed choices - Answer B Which of the following statements is correct? a) Gases flow from a low pressure to a higher pressure. b) Gases do not flow unless pushed by mechanical devices. c) Gases flow from a high pressure to a lower pressure. d...
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Exam (elaborations)
OBT3 Ch. 7 & 11 Questions with Guaranteed Pass Solutions 2026 Updated.
Describe the purpose(s) of a combustion chamber. Select one or more: a. rapid heat up/cool down b. contains the flame c. reflects heat back into the flame - Answer a. rapid heat up/cool down b. contains the flame c. reflects heat back into the flame Increasing excess air will _______________ (increase or decrease) the temperature of the flame and ________________ (increase or decrease) the temperature of the flue gases leaving the heat exchanger. - Answer excess air will DE...
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Exam (elaborations)
Chapter 13 to OBT3 Final Exam with Quality Answers 2026-2027 Updated.
The recommended hot water temperature for domestic uses A) 160 F B) 100 F C) 130 F D) 180 F - Answer C) 130 F True or false To repair a leakage temperature and pressure relief valve a plug would be allowed until a new valve could be ordered - Answer False Explain the service problems of a water tank with a broken dip tube - Answer Cold water would not be pushed to the bottom of the tank, burner cycle would fail "Stacking" in a water heater could be the resul...
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Exam (elaborations)
P-99 / Low PSI Oil Burner Operator Final Exam Questions and All Correct Answers.
All heating, combustion, and cooking equipment shall be provided with insulation or the building construction shall be fire protected, so that during operation the surface of combustible construction materials will not be raised to a temperature higher than ____. - Answer 170 ̊ F Acceptance tests: Boilers shall not be placed in operation upon completion of construction until they have been ____ and an equipment use permit has been issued by the commissioner. - Answer Inspected and ...
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Exam (elaborations)
Mass oil burner / NFPA 31 & NORA Questions Fully Solved.
Cast iron fittings can be used in heating fuel systems? - Answer False Tank vent shall terminate - Answer Within 12 feet of the fill and visible from the fill Tanks exceeding 330 gallons must have - Answer Top supply connection Fuel return piping from an appliance shall - Answer Enter the top of the tank Oil appliances burning used oil shall only be installed - Answer In commercial or industrial occupancies Technician must be present for filling of new oil...
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Exam (elaborations)
MA oil burners Test Questions and All Correct Answers 2026-2027 Updated.
Air Heater. - Answer . An indirect-fired appliance intended to supply heated air for space heating and other purposes, but not intended for permanent installation. Air pressure switch . - Answer An electrical switch designed to prove that the proper draft has been established by the power venter or burner and allows the burner to operate. If the power venter or burner is not performing so as to satisfy the operating requirements of the equipment for safe performance, the switch will...
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Exam (elaborations)
OBT3 6 & 10 And Ch. 7 & 11 Final Exam with Guaranteed Pass Solutions.
As the ratio of carbon to hydrogen atoms increases in comparing hydrocarbon molecules then the heavier the molecule, the slower it burns and the more heat per volume it produces Select one: True False - Answer true Approximately 96% to 99.75% of fuel oil is composed of: Select one: a. methane and propane b. sulphur, oxygen and nitrogen c. hydrogen and carbon d. manufactured oil - Answer hydrogen and carbon The minimum flash point of No. 2 fuel oil allowed by Standard ...
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Exam (elaborations)
OBT3 Final EXAM Questions with Guaranteed Pass Solutions All Solved Graded A+.
Which of the following should be worn when using power tools? a) Safety glasses b) A hard hat c) Leather gloves d) Safety boots - Answer A What is the minimum acceptable type of respiratory protection to be used when cleaning a soot filled furnace? - Answer Disposable Filter Masks What is the proper vertical to horizontal distance ratio for ladder placement? - Answer 3:1 or 4:1 What muscles or parts of your body should you primarily use to lift a weight from the ...
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Exam (elaborations)
OBT3 Final Exam Questions And All Correct Answers 2026-2027 Updated.
Chapter 1 - Safety - Answer Which of the following should be worn when using power tools - Answer Safety glasses Ratio for a ladder - Answer 3:1 or 4:1 What is the minimum acceptable type of respiratory protection to be used when cleaning a soot filled furnace - Answer Disposable filter mask What muscles or parts of your body should you primarily use to life a weight from the floor - Answer Leg muscles Water on wood fires, electrical fires, and flammable ...
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Exam (elaborations)
OBT3 Final Exam Questions and All Actual Answers 2026 Updated.
Fuel oil is a member of the _______ family of chemical compounds. - Answer Hydrocarbon Approximately 96% to 99.75% of fuel oil is composed of - Answer Hydrogen and carbon The two general categories of refined fuel oils are - Answer Distillates and residuals True or false: kerosine is classified separately from fuel oil but considered as fuel oil under the fuel oil code - Answer True 0 fuel oil application - Answer Intended for use in appliances in far norther...
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Exam (elaborations)
OBT: Unit 9 (gas) & OBT Test Questions All Solved 2026-2027 Updated.
What term is used to describe a burner flame that moves back through the burner nozzle? a. floating flame b. flame lift c. flash back d. orange flashing flame - Answer c. flash back through which device is fuel discharged to an atmospheric burner? a. orifice b. nozzle c. zero governor - Answer a. orifice which type of atmospheric burner produces a single large flame? a. inshot burner b. single or mono-port burner c. drilled port burner d. upshot burner - Answer...
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Exam (elaborations)
OBT 3 Final Exam Questions Fully Solved.
1 You must never use a chisel with a ______ head. - Answer mushroomed 3. A ____ wrench is better suited to loosening tight nuts. - Answer box 4. Name three types of snips: - Answer Straight snips combinations snips Compound snips Name three types of pliers: - Answer needle nose side cutters channel locks 5. A masonry drill bit is suited for drilling into concrete due to its _____ tip. - Answer carbide 6.____ hammers are best suited for striking chisels...
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Exam (elaborations)
OBT 2 Mohawk Exam Questions with Complete Solutions 2026.
About _____________ cubic feet of air is required to ensure complete combustion of one [1] gallon of #2 fuel oil. - Answer 2000 T/F? Air supply openings that communicate with the outdoors of a building must be located not less than twelve [12] inches above the outside grade level. - Answer True An oil-fired boiler with an input of 0.75 USGPH that is vented into a clay lined masonry chimney 20 feet high must maintain a minimum base temperature of ____________ °F. - Answer 32...
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