OIL BURNER LICENSE EXAM AND PRACTICE EXAM NEWEST ACTUAL EXAM COMPLETE 250 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

1|Page



OIL BURNER LICENSE EXAM AND PRACTICE
EXAM NEWEST 2026-2027 ACTUAL EXAM
COMPLETE 250 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+


OIL BURNER LICENSE EXAM
If the vacuum reading is substantially above the calculated
reading, (with the burner running) the cause may be: -
CORRECT ANSWER--Plugged fuel filter
-Kinked oil supply line
-Check valve sticking


With most new flame retention burners, the motor speed is: -
CORRECT ANSWER-3400 rpm


To check for a proper nozzle line cut-off, the pressure gauge is
installed in the: - CORRECT ANSWER-Nozzle port


Fuel units are generally set at the factory at: - CORRECT
ANSWER-100 psi

,2|Page


The oil burner nozzle in a high pressure burner performs the
following functions: - CORRECT 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: - CORRECT ANSWER--Tangential slots
-Swirl chamber
-Orifice


Cold oil or high viscosity problems may be eliminated by: -
CORRECT ANSWER--Increasing the pump pressure and
reducing the nozzle size
-Installing a nozzle line pre-heater


The following conditions or elements affect choosing the correct
nozzle spray patterns: - CORRECT ANSWER--Air-oil mixing
design of the burner
-Shape of the chamber


Which condition affects nozzle spray droplet size? - CORRECT
ANSWER-Fuel pump pressure

,3|Page


To burn one pound of fuel oil, how many pounds of air does it
take? - CORRECT ANSWER-14.4 lbs


A layer of soot 1/16" thick will increase fuel consumption by: -
CORRECT ANSWER-4%


When sizing a combustion chamber for a firing rate of 1.00 gph,
you should provide a minimum floor space of: - CORRECT
ANSWER-Between 80 to 100 square inches


The most common type of burner design today is the: -
CORRECT ANSWER-High pressure atomizing


Poor draft due to a faulty chimney may be improved by
installing a good: - CORRECT ANSWER-Draft inducer


The draft differential produced by chimneys is best measured
with a draft gauge in: - CORRECT ANSWER-Inches of water
column


The most important draft measurement to be taken on any oil-
fired unit is: - CORRECT ANSWER--The draft at the breach
-The draft over the fire

, 4|Page


The proper location to install a draft inducer is: - CORRECT
ANSWER-In the flue pipe between the draft regulator and the
chimney


Using combustion test instruments to measure the composition
and temperature of the flue gas as they leave the heating unit
will indicate the: - CORRECT ANSWER-Steady state
efficiency


The holes that are provided in the flue pipe for combustion
testing must be: - CORRECT ANSWER-Between the heating
unit and the draft regulator


When using a pump type smoke tester, 10 full strokes are
necessary to: - CORRECT ANSWER-Draw the proper amount
of fluegas past the paper


The fluid in a CO2 tester is good for how many tests? -
CORRECT ANSWER-For about 200 tests


In an electric circuit in order for the wattage to remain the same
if the voltage drops, the amperage must: - CORRECT
ANSWER-Increase