FDNY COF P-98 Practice Test 2025-2026
Questions with Correct Answers //Verified
Question 1
During the hydrostatic test, the piping shall be tested at _______ percent of the maximum
working pressure, but at a pressure less than the test pressure required for the storage
tank.
Correct Answer
150%
Question 2
The Mechanical Code requires that all _________ and _________ be hydrostatically tested
for tightness by the installing contractor hired by the building owner. (2 answers)
Correct Answer
- Fuel-oil piping
- Storage tanks
Question 3
What device is used to measure pressure below atmospheric pressure?
Correct Answer
Vacuum gauge
Page 1 of 19
,Question 4
Appliances must not be converted from the fuel grade specified on the rating plate for
use with a different fuel without first securing written approval from the:
Correct Answer
NYC Department of Buildings
Question 5
3.- The use of the word should refers to:
Correct Answer
Policies, procedures and/or best practices recommended by the FDNY, and may
not be a codified requirement.
Question 6
The mixture of oil and air is sprayed in vapor form into a __________ area where
combustion takes place.
Correct Answer
Firebox
Question 7
What type of portable fire extinguishers are appropriate for use in case of fire with a
fuel-oil storage? (2 answers)
Correct Answer
- Class B
- ABC Multi-purpose
Page 2 of 19
, Question 8
A ____________ is a flame detection control. It is a device that will shut down an oil
burner if a flame is not visible to the scanner.
Correct Answer
Photoelectric cell
Question 9
A ___________ is a device mounted on the smoke stack or chimney will shut down an oil
burner if there is excessive smoke or if the fire is improper.
Correct Answer
Smoke alarm
Question 10
The ___________ removes most contaminants from the oil before the oil reaches the
burner’s strainer.
Correct Answer
Oil filter
Question 11
A defective oil cut-off valve can lead to a condition referred to as ____________. This may
easily lead to a fire on the floor in front of the heating unit.
Correct Answer
After-drip
Page 3 of 19
Questions with Correct Answers //Verified
Question 1
During the hydrostatic test, the piping shall be tested at _______ percent of the maximum
working pressure, but at a pressure less than the test pressure required for the storage
tank.
Correct Answer
150%
Question 2
The Mechanical Code requires that all _________ and _________ be hydrostatically tested
for tightness by the installing contractor hired by the building owner. (2 answers)
Correct Answer
- Fuel-oil piping
- Storage tanks
Question 3
What device is used to measure pressure below atmospheric pressure?
Correct Answer
Vacuum gauge
Page 1 of 19
,Question 4
Appliances must not be converted from the fuel grade specified on the rating plate for
use with a different fuel without first securing written approval from the:
Correct Answer
NYC Department of Buildings
Question 5
3.- The use of the word should refers to:
Correct Answer
Policies, procedures and/or best practices recommended by the FDNY, and may
not be a codified requirement.
Question 6
The mixture of oil and air is sprayed in vapor form into a __________ area where
combustion takes place.
Correct Answer
Firebox
Question 7
What type of portable fire extinguishers are appropriate for use in case of fire with a
fuel-oil storage? (2 answers)
Correct Answer
- Class B
- ABC Multi-purpose
Page 2 of 19
, Question 8
A ____________ is a flame detection control. It is a device that will shut down an oil
burner if a flame is not visible to the scanner.
Correct Answer
Photoelectric cell
Question 9
A ___________ is a device mounted on the smoke stack or chimney will shut down an oil
burner if there is excessive smoke or if the fire is improper.
Correct Answer
Smoke alarm
Question 10
The ___________ removes most contaminants from the oil before the oil reaches the
burner’s strainer.
Correct Answer
Oil filter
Question 11
A defective oil cut-off valve can lead to a condition referred to as ____________. This may
easily lead to a fire on the floor in front of the heating unit.
Correct Answer
After-drip
Page 3 of 19
