COMPREHENSIVE REVIEW 2026
QUESTIONS WITH ANSWERS GRADED A+
⩥ What are the 2 voltage circuits of a primary control? Answer: Line &
Low.
⩥ What is the function of a fuse? Answer: Protect circuit.
⩥ What is the High Limit cut out? Answer: Max safe Temp or Pressure
setting.
⩥ What is the High Limit cut in? Answer: Cut out minus Differential.
⩥ What is the "Max" Lockout time for a burner with a 3 GPH Flow
Rate? Answer: 45 Seconds.
⩥ What is the minimum stack temperature which will allow a stack
switch to work? Answer: 400 degrees F
⩥ When do you apply a permit to store oil? Answer: 10 gallons.
, ⩥ What is the "Main" function of an oil burner Primary Control?
Answer: Prove Flame.
⩥ Stack Relay must be reset after lockout? True? or False? Answer:
True.
⩥ What is the Required minimum height required for fill and vent pipes?
Answer: 3 Feet.
⩥ What is the smallest vent pipe used for residential. Answer: 1 inch 1/4
⩥ What size is the oil line for a residential burner? Answer: 3/8
⩥ Largest oil capacity for residential without a license? Answer: 10,000
Gallons
⩥ At what height ceiling would a second thermal switch be required?
Answer: 12'
⩥ A typical residential oil burner is also s/u to run Kerosene True? Or
False? Answer: False
⩥ Permit to install an oil burner is issued by the? Answer: State Fire
Marshall