NATE Oil Heating 3

Question 1

What does a barometric draft control (draft regulator) do in an oil heating system?

Accepted Answer

Maintain constant flue draft by admitting dilution air when draft exceeds setpoint

Answer

Boost flue draft in low-pressure conditions

Answer

Prevent flue gases from entering the living area

Answer

Control combustion air to the burner

Question 2

What is the minimum recommended flue gas temperature for an oil furnace to prevent condensation in the flue?

Accepted Answer

350°F

Answer

150°F

Answer

250°F

Answer

450°F

Question 3

What is the purpose of the oil filter installed in the oil supply line before the pump?

Accepted Answer

Filter sediment and particulates that could clog the nozzle or damage the pump

Answer

Remove water from the oil

Answer

Reduce oil temperature

Answer

Control oil flow rate

Question 4

What annual efficiency rating measures the seasonal performance of an oil furnace?

Accepted Answer

AFUE

Answer

COP

Answer

SEER

Answer

EER

Question 5

What causes water in the oil tank and what is its effect on the burner?

Accepted Answer

Condensation inside the tank accumulates water at the bottom; water can be drawn into the burner causing flame-outs and pump damage

Answer

Hot oil lines cause steam condensation; water has no effect on burner operation

Answer

Only a tank leak allows water entry; it dilutes the oil reducing BTU output

Answer

Humidity in the combustion air dissolves into the fuel; causes nozzle clogging only

Question 6

What is the correct response when the oil burner primary control goes to hard lockout?

Accepted Answer

Press the reset button once after verifying the cause; repeated resets flood the combustion chamber with oil

Answer

Immediately press the reset button multiple times to restart

Answer

Replace the cad cell without pressing reset

Answer

Call the gas company