200 WITH Correct Answers
100% PASS
In an electric circuit for the wattage to remain the same if the voltage drops,
the amperage must—ANSWER-Increase
Atomizing type burners were designed to burn which type of fuel—ANSWER-
Type 2 fuel oil
Pour point problems with outside above ground fuel tanks can be partially
relieved by—ANSWER-Reducing the pour point of No. 2 fuel oil by blending
it with No. 1 fuel oil.
A fuel oil storage tank cannot be installed—ANSWER-In the furnace room
with 5' of heating unit.
The primary purpose of a fuel pump on a high-pressure burner is to—
ANSWER-Deliver oil at a constant and regulated pressure to the nozzle
If the vacuum reading is substantially above the calculated reading, (with
the burner running) the cause may be—ANSWER-Plugged fuel filter, Kinked
oil supply line, Check valve sticking
, With most new flame retention burners, the motor speed is—ANSWER-3450
To check for proper nozzle line cut-off, the pressure gauge is installed in
the—ANSWER-Nozzle Port
Fuel units are generally set at the factory at—ANSWER-100psi
The oil burner nozzle in a high-pressure burner performs the following
functions—ANSWER-Atomizes the oil
Provides a pattern of oil spray
Delivers a fixed amount of oil
The nozzle flow rate, spray angle and pattern are directly related to—
ANSWER-•Tangential slots
. Swirl chamber
Orifice
Cold oil or high viscosity problems may be eliminated by—ANSWER-
•Increasing pump pressure and reducing nozzle size
• Installing a nozzle line pre-heater
The following conditions or elements affect choosing the correct nozzle spray
pattern—ANSWER-•Air-oil mixing design of burner
•. Shape of the chamber
Which condition affects nozzle spray droplet size?—ANSWER-Fuel Pump
Pressure
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