FDNY COF P-98 EXAM AND PRACTICE EXAM ACTUAL
EXAM 200+ QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
Question 1. During the hydrostatic test, the piping shall be tested at what percentage
of the maximum working pressure?
A. 100%
B. 125%
C. 150%
D. 200%
Correct Answer: C
Rationale: During the hydrostatic test, the piping shall be tested at 150% of the
maximum working pressure, but at a pressure less than the test pressure required for
the storage tank. This ensures the integrity of the piping system under pressure
conditions that exceed normal operating parameters, identifying any potential
weaknesses or leaks before the system is placed into service .
Question 2. The Mechanical Code requires that all and be
hydrostatically tested for tightness by the installing contractor hired by the building
owner.
A. Fuel-oil piping and storage tanks
B. Water pipes and drainage systems
C. Gas lines and vent pipes
D. Electrical conduits and junction boxes
,Correct Answer: A
Rationale: The Mechanical Code requires that all fuel-oil piping and storage tanks be
hydrostatically tested for tightness by the installing contractor hired by the building
owner. This testing ensures that both the piping system and the storage tanks are leak-
free and safe for operation before being placed into service .
Question 3. What device is used to measure pressure below atmospheric pressure?
A. Pressure gauge
B. Manometer
C. Vacuum gauge
D. Barometer
Correct Answer: C
Rationale: A vacuum gauge is the device used to measure pressure below atmospheric
pressure. In fuel-oil transfer systems, the vacuum gauge is used to indicate to the
operator whether there is an obstruction in the suction line, such as a dirty oil strainer
that requires cleaning .
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:
A. NYC Department of Buildings
B. NYC Fire Department
C. NYC Department of Environmental Protection
D. All of the above
,Correct Answer: D
Rationale: 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
NYC Department of Buildings, NYC Department of Environmental Protection, and FDNY.
This requirement ensures that the conversion is safe, complies with environmental
regulations, and meets fire safety standards .
Question 5. The use of the word "should" refers to:
A. A mandatory requirement of the Fire Code
B. Policies, procedures and/or best practices recommended by the FDNY
C. An emergency order from the Fire Commissioner
D. A state law requirement
Correct Answer: B
Rationale: The use of the word "should" refers to policies, procedures and/or best
practices recommended by the FDNY, and may not be a codified requirement. This is
distinct from the word "shall," which indicates a mandatory requirement of the Fire Code
or FDNY regulations .
Question 6. The mixture of oil and air is sprayed in vapor form into a area
where combustion takes place.
A. Firebox
B. Fuel tank
, C. Piping loop
D. Strainer housing
Correct Answer: A
Rationale: The mixture of oil and air is sprayed in vapor form into a firebox area (the
combustion chamber) where combustion takes place. The mixture of oil and air is
sprayed in vapor form into a firebox area where combustion takes place, and this area is
where the heat energy is liberated from the fuel-oil .
Question 7. What type of portable fire extinguishers are appropriate for use in case of
fire with a fuel-oil storage?
A. Class A only
B. Class B and ABC Multi-purpose
C. Class C only
D. Class D only
Correct Answer: B
Rationale: Class B fire extinguishers are appropriate for flammable liquid fires, including
fuel-oil fires. ABC multi-purpose extinguishers are also appropriate as they can handle
Class B fires along with Class A and C fires. These extinguishers should be readily
available in areas where fuel-oil is stored or transferred .
Question 8. What is the normal steam pressure for low pressure boilers?
EXAM 200+ QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
Question 1. During the hydrostatic test, the piping shall be tested at what percentage
of the maximum working pressure?
A. 100%
B. 125%
C. 150%
D. 200%
Correct Answer: C
Rationale: During the hydrostatic test, the piping shall be tested at 150% of the
maximum working pressure, but at a pressure less than the test pressure required for
the storage tank. This ensures the integrity of the piping system under pressure
conditions that exceed normal operating parameters, identifying any potential
weaknesses or leaks before the system is placed into service .
Question 2. The Mechanical Code requires that all and be
hydrostatically tested for tightness by the installing contractor hired by the building
owner.
A. Fuel-oil piping and storage tanks
B. Water pipes and drainage systems
C. Gas lines and vent pipes
D. Electrical conduits and junction boxes
,Correct Answer: A
Rationale: The Mechanical Code requires that all fuel-oil piping and storage tanks be
hydrostatically tested for tightness by the installing contractor hired by the building
owner. This testing ensures that both the piping system and the storage tanks are leak-
free and safe for operation before being placed into service .
Question 3. What device is used to measure pressure below atmospheric pressure?
A. Pressure gauge
B. Manometer
C. Vacuum gauge
D. Barometer
Correct Answer: C
Rationale: A vacuum gauge is the device used to measure pressure below atmospheric
pressure. In fuel-oil transfer systems, the vacuum gauge is used to indicate to the
operator whether there is an obstruction in the suction line, such as a dirty oil strainer
that requires cleaning .
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:
A. NYC Department of Buildings
B. NYC Fire Department
C. NYC Department of Environmental Protection
D. All of the above
,Correct Answer: D
Rationale: 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
NYC Department of Buildings, NYC Department of Environmental Protection, and FDNY.
This requirement ensures that the conversion is safe, complies with environmental
regulations, and meets fire safety standards .
Question 5. The use of the word "should" refers to:
A. A mandatory requirement of the Fire Code
B. Policies, procedures and/or best practices recommended by the FDNY
C. An emergency order from the Fire Commissioner
D. A state law requirement
Correct Answer: B
Rationale: The use of the word "should" refers to policies, procedures and/or best
practices recommended by the FDNY, and may not be a codified requirement. This is
distinct from the word "shall," which indicates a mandatory requirement of the Fire Code
or FDNY regulations .
Question 6. The mixture of oil and air is sprayed in vapor form into a area
where combustion takes place.
A. Firebox
B. Fuel tank
, C. Piping loop
D. Strainer housing
Correct Answer: A
Rationale: The mixture of oil and air is sprayed in vapor form into a firebox area (the
combustion chamber) where combustion takes place. The mixture of oil and air is
sprayed in vapor form into a firebox area where combustion takes place, and this area is
where the heat energy is liberated from the fuel-oil .
Question 7. What type of portable fire extinguishers are appropriate for use in case of
fire with a fuel-oil storage?
A. Class A only
B. Class B and ABC Multi-purpose
C. Class C only
D. Class D only
Correct Answer: B
Rationale: Class B fire extinguishers are appropriate for flammable liquid fires, including
fuel-oil fires. ABC multi-purpose extinguishers are also appropriate as they can handle
Class B fires along with Class A and C fires. These extinguishers should be readily
available in areas where fuel-oil is stored or transferred .
Question 8. What is the normal steam pressure for low pressure boilers?
