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Journeyman Oil Exam Questions And Verified Answers Graded A+
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Journeyman Oil Exam Questions And VerifiedAnswers Graded A+
Sealing by means of furnace cement or other materials a cracked heat exchanger or
parts which provide for a closure shall be for _________ repairs only. - Answer
Temporary repairs
If a fuel-oil storage tank is to be permanently removed from service for any reason, the
tank and all piping connected thereto, including outside fill and vent piping and any
supply piping connected to the appliance, shall be: -Answer -Emptied of all liquid
contents and sludge.
-Cleaned and rendered free of combustible vapors.
-Removed from premises or property.
- Properly disposed of in accordance with all applicable local, state and federal rules
and regulations.
What is an indication you may have a plugged fuel filter? -Answer -High vacuum on the
oil line.
-Tripped control.
What is normal fuel pressure delivered to the nozzle? -Answer -Older burners = 100psi
-Newer burners= 140psi
Oil lines take about ______ to ______ Hg of vacuum for every foot we raise of oil. _____
inch of vacuum for every 10 feet of horizontal run and ______ inch for a clean oil filter. -
Answer .75' to 1" Hg for every foot of lifted oil.
1" of vacuum for every 10 feet of horizontal run.
1/2" of vacuum for a clean oil filter.
,To calculate the vacuum, estimate ____ inch of vacuum per foot of oil lift, _____ inch of
vacuum for each _____ feet of horizontal run, and ______ inch for a clean oil filter. -
Answer 1" inch
1" inch
10' feet
1/2" inch
What is estimated vacuum for a two stage pump operating with 7ft of lift and 30ft of
horizontal offset? - Answer 10.5 Hg
What's the radius of a pipe? - Answer Half the diameter.
What's the diameter of a pipe? - Answer Distance across the the pipe.
What's the circumference of a pipe? - Answer Diameter x PI
True if the technician has installed a space in the electrical panel for the branch circuit
overcurrent device for it and has installed the associated low voltage wiring, provided
its power supply is fed from the heating branch circuit. True/False? - Answer Ture
Warm air ducts can have a heat loss as great as? - Answer 40%
Direct vent heating units less than 50,000 BTU's may be vented _______ from a window. -
Ans. 9" inches
One pound of water pressure is good for how many feet of height in pipe? - Ans. 2.3 feet
Can a chimney connector pass through a wall? - Ans. Yes.
If all combustible materials in the wall are cut away from the chimney connector a
sufficient distance to provide the clearance required and a non combustible material is
,used to close up the opening.
Appliances requiring a negative chimney draft, the chimney connector shall be not
longer than ______% of the portion of the chimney above the chimney connector inlet. -
Answer 75%
When detecting darkness, the resistance of a chad cell should be around _______ ohms
or higher. - Answer 100,000 ohms
Chamberless firing is mainly for what purpose? - Answer Better heat transfer.
When conducting an efficiency test, the burner shall fire for at least a 5-minute period to
allow. - Answer The appliance to reach a steady state.
How many times do you pump a "wet" tester for a proper CO2 sample? - Answer 18-20
times.
What are the normal ohms readings of a cad cell when the burner is running? - Answer
300 - 1000 ohms.
Controls that are reverse acting operate in what manner? - Answer Close on rise.
Name the function of a fan/limit switch on a warm air furnace. - Answer -Monitors
heat/temp.
-High limit.
On multi-unit installations the emergency and thermal electrical switches shall be wired
in series through individual unit relays so that if one switch is opened, all the equipment
will be rendered inoperable whenever the emergency switch is opened. True/false? -
Answer True.
Vent pipes shall terminate no more than ____feet from the fill pipe and at a point visible
, from the fill point. - Answer 12 feet.
All vent pipes shall terminate outside of a building at a point no less than ______ from any
building opening. - Answer 2 feet.
What type of ignition turns off after flame is established? - Answer Interrupted ignition.
What type of ignition stays on while the burner is running? - Answer Intermittent ignition.
To adjust the air ratio for various firing rates on an adjustable head burner you do this: -
Answer Move the draw assembly in or out of the air tube.
Air is ____% oxygen, ____% nitrogen, and ____% other gases. - Answer -20.9% oxygen.
-78% Nitrogen.
-1.1% other gases.
What is usual fuel pump pressure of a high pressure oil burner? - Answer -100psi for
older burners.
-140psi for newer burners.
Where fed directly from a storage oil tank, the fuel supply system shall be designed so
that the burner fuel unit operates with less than _____ in H.G. - Answer 10 in H.G.
What is the purpose of the OSV devise? - Answer -Limits pressure on burner pumps to a
max 3psi.
-Automatic shut off if line is broken.
What is the maximum running vacuum for a single stage fuel pump? - Answer 6" H.G.
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