FDNY A-35 Air Compressor Certificate
of Fitness Practice Exam 100 Questions
with Correct Answers and Detailed
Rationales (Graded A+)
SECTION 1: PERMIT REQUIREMENTS AND BASIC COMPRESSOR
OPERATION (Questions 1-15)
Question 1
When is an FDNY permit required for an air compressor?
A) When used to compress air to a pressure exceeding 50 psi
B) When used to compress any nonflammable, corrosive, or oxidizing
gas, including air, to a pressure exceeding 100 psi
C) When used to compress any flammable gas to any pressure
D) When used for outdoor air compression only
Correct Answer: B) When used to compress any nonflammable,
corrosive, or oxidizing gas, including air, to a pressure exceeding 100
psi
Rationale: An FDNY permit is required if a compressor is used to
compress any nonflammable, corrosive, or oxidizing gas, including air,
to a pressure exceeding 100 psi. This also includes fairs and festivals
where such compressors are used. The Bureau of Fire Prevention
issues these permits.
,Question 2
When is a permit NOT required for an air compressor?
A) When compressing air to 150 psi indoors
B) When compressing air outdoors
C) When used in a commercial garage
D) When used to supply breathing air
Correct Answer: B) When compressing air outdoors
Rationale: A permit is not required for outdoor air compression. This is
an exception to the general requirement. The Bureau of Fire
Prevention issues permits for compressors that require them.
Question 3
What is the primary function of an air compressor in building
operations?
A) Increase electrical efficiency
B) Remove heat from mechanical rooms
C) Supply compressed air for equipment and systems
D) Regulate water pressure
Correct Answer: C) Supply compressed air for equipment and systems
Rationale: Compressors are designed to pressurize air for use in tools,
controls, and building systems. Their primary purpose is to provide a
source of compressed air for various applications such as pneumatic
tools, lifts, paint spray booths, and building control systems.
,Question 4
Air compressors power which of the following?
A) Only construction tools
B) Industrial equipment and construction tools
C) Only electrical systems
D) Only heating systems
Correct Answer: B) Industrial equipment and construction tools
Rationale: Air compressors power industrial equipment and
construction tools. They are also used for pneumatic wrenches, lifts in
auto service stations, paint spray booths, and facilitate the efficient
repair of vehicles and their safe operation on public thoroughfares.
Question 5
What are the different types of air compressors?
A) Single-stage, multi-stage, and high-pressure
B) Reciprocating, centrifugal, rotary, and scroll
C) Electric, gas, and steam-powered
D) Portable and stationary
Correct Answer: B) Reciprocating, centrifugal, rotary, and scroll
Rationale: There are several types of air compressors, including
reciprocating, centrifugal, rotary, and scroll. The difference between
them is the way in which they compress the air. The most commonly
used air compressor is the reciprocating air compressor.
, Question 6
What is the most common type of air compressor used?
A) Centrifugal compressor
B) Reciprocating compressor
C) Rotary screw compressor
D) Scroll compressor
Correct Answer: B) Reciprocating compressor
Rationale: The reciprocating air compressor is the most commonly
used type. It operates using a piston in a cylinder, creating
compression in strokes. A single-stage compressor has one cylinder
and one piston, while a multi-stage compressor has more than one
cylinder and piston.
Question 7
An air compressor with one cylinder and one piston is called a:
A) Single-stage air compressor
B) Two-stage air compressor
C) Multi-stage air compressor
D) Centrifugal air compressor
Correct Answer: A) Single-stage air compressor
Rationale: An air compressor with one cylinder and one piston is
called a single-stage air compressor. An air compressor with more
than one cylinder and piston is called a multi-stage air compressor.
of Fitness Practice Exam 100 Questions
with Correct Answers and Detailed
Rationales (Graded A+)
SECTION 1: PERMIT REQUIREMENTS AND BASIC COMPRESSOR
OPERATION (Questions 1-15)
Question 1
When is an FDNY permit required for an air compressor?
A) When used to compress air to a pressure exceeding 50 psi
B) When used to compress any nonflammable, corrosive, or oxidizing
gas, including air, to a pressure exceeding 100 psi
C) When used to compress any flammable gas to any pressure
D) When used for outdoor air compression only
Correct Answer: B) When used to compress any nonflammable,
corrosive, or oxidizing gas, including air, to a pressure exceeding 100
psi
Rationale: An FDNY permit is required if a compressor is used to
compress any nonflammable, corrosive, or oxidizing gas, including air,
to a pressure exceeding 100 psi. This also includes fairs and festivals
where such compressors are used. The Bureau of Fire Prevention
issues these permits.
,Question 2
When is a permit NOT required for an air compressor?
A) When compressing air to 150 psi indoors
B) When compressing air outdoors
C) When used in a commercial garage
D) When used to supply breathing air
Correct Answer: B) When compressing air outdoors
Rationale: A permit is not required for outdoor air compression. This is
an exception to the general requirement. The Bureau of Fire
Prevention issues permits for compressors that require them.
Question 3
What is the primary function of an air compressor in building
operations?
A) Increase electrical efficiency
B) Remove heat from mechanical rooms
C) Supply compressed air for equipment and systems
D) Regulate water pressure
Correct Answer: C) Supply compressed air for equipment and systems
Rationale: Compressors are designed to pressurize air for use in tools,
controls, and building systems. Their primary purpose is to provide a
source of compressed air for various applications such as pneumatic
tools, lifts, paint spray booths, and building control systems.
,Question 4
Air compressors power which of the following?
A) Only construction tools
B) Industrial equipment and construction tools
C) Only electrical systems
D) Only heating systems
Correct Answer: B) Industrial equipment and construction tools
Rationale: Air compressors power industrial equipment and
construction tools. They are also used for pneumatic wrenches, lifts in
auto service stations, paint spray booths, and facilitate the efficient
repair of vehicles and their safe operation on public thoroughfares.
Question 5
What are the different types of air compressors?
A) Single-stage, multi-stage, and high-pressure
B) Reciprocating, centrifugal, rotary, and scroll
C) Electric, gas, and steam-powered
D) Portable and stationary
Correct Answer: B) Reciprocating, centrifugal, rotary, and scroll
Rationale: There are several types of air compressors, including
reciprocating, centrifugal, rotary, and scroll. The difference between
them is the way in which they compress the air. The most commonly
used air compressor is the reciprocating air compressor.
, Question 6
What is the most common type of air compressor used?
A) Centrifugal compressor
B) Reciprocating compressor
C) Rotary screw compressor
D) Scroll compressor
Correct Answer: B) Reciprocating compressor
Rationale: The reciprocating air compressor is the most commonly
used type. It operates using a piston in a cylinder, creating
compression in strokes. A single-stage compressor has one cylinder
and one piston, while a multi-stage compressor has more than one
cylinder and piston.
Question 7
An air compressor with one cylinder and one piston is called a:
A) Single-stage air compressor
B) Two-stage air compressor
C) Multi-stage air compressor
D) Centrifugal air compressor
Correct Answer: A) Single-stage air compressor
Rationale: An air compressor with one cylinder and one piston is
called a single-stage air compressor. An air compressor with more
than one cylinder and piston is called a multi-stage air compressor.
