FDNY A-35 Exam Questions with
Complete Solutions10
Air compressors power... - ANSWERS-(1) industrial equipment and (2) construction tools
Examples of equipment powered by air compressor - ANSWERS-pneumatic wrenches, lifts in
auto service stations, paint spray booths
Air compressors enable... - ANSWERS-(1) efficient repair of all types of vehicles; and (2) facilitate
their safe operation on public thoroughfares
Permit is required for air compressor - ANSWERS-that compresses air above 100 PSI
Types of air compressors - ANSWERS-(1) reciprocating;
(2) centrifugal;
(3) solar; and
(4) rotary
*Difference is the way in which they compress air
How do air compressors work - ANSWERS-take the air in a room and force it into a container
UNDER PRESSURE. The more air forced into the container, the greater the pressure. Compressed
air can be discharged from the container at a controlled rate.
Most common air compressor - ANSWERS-Reciprocating
, Air compressors are sometimes called - ANSWERS-air pumps
Air compressors can be powered by: - ANSWERS-(1) electric motors;
(2) internal combustion engines; or
(3) steam turbines
Explosions & air compressors - ANSWERS-If there is a build up of flammable gases (ex: in service
stations and workshops), those gases are heavier than air and fall to the floor before spreading
outward. These gases are easily ignited by sparks and high temperatures--which INCLUDES the
heat generated by an air compressor.
To avoid explosions w/ air compressors - ANSWERS-Raise air compressor at LEAST 5 feet above
ground level so that no flammable gases are drawn into the compressor. To meet the height
requirement you can place compressor on a shelf or bench OR the air receiver tank may be
turned and stood on end w/ the air compressor bolted to the top of the tank.
Power to air compressor - ANSWERS-entire unit is driven by an electric motor. Motor activates a
series of drive belts. Belts power the moving parts of the unit--like w/ power steering and
alternator in automobile
Compression Chamber operation - ANSWERS-Air is compressed in compression chamber which
consists of a PISTON inside a CYLINDER. Piston moves up and down.
When piston moves down -->draws air into cylinder, through INTAKE VALVE (valve automatically
opens when piston moves down).
When piston moves up-->air is compressed (intake vale automatically closes to avoid air
escaping from cylinder).
Complete Solutions10
Air compressors power... - ANSWERS-(1) industrial equipment and (2) construction tools
Examples of equipment powered by air compressor - ANSWERS-pneumatic wrenches, lifts in
auto service stations, paint spray booths
Air compressors enable... - ANSWERS-(1) efficient repair of all types of vehicles; and (2) facilitate
their safe operation on public thoroughfares
Permit is required for air compressor - ANSWERS-that compresses air above 100 PSI
Types of air compressors - ANSWERS-(1) reciprocating;
(2) centrifugal;
(3) solar; and
(4) rotary
*Difference is the way in which they compress air
How do air compressors work - ANSWERS-take the air in a room and force it into a container
UNDER PRESSURE. The more air forced into the container, the greater the pressure. Compressed
air can be discharged from the container at a controlled rate.
Most common air compressor - ANSWERS-Reciprocating
, Air compressors are sometimes called - ANSWERS-air pumps
Air compressors can be powered by: - ANSWERS-(1) electric motors;
(2) internal combustion engines; or
(3) steam turbines
Explosions & air compressors - ANSWERS-If there is a build up of flammable gases (ex: in service
stations and workshops), those gases are heavier than air and fall to the floor before spreading
outward. These gases are easily ignited by sparks and high temperatures--which INCLUDES the
heat generated by an air compressor.
To avoid explosions w/ air compressors - ANSWERS-Raise air compressor at LEAST 5 feet above
ground level so that no flammable gases are drawn into the compressor. To meet the height
requirement you can place compressor on a shelf or bench OR the air receiver tank may be
turned and stood on end w/ the air compressor bolted to the top of the tank.
Power to air compressor - ANSWERS-entire unit is driven by an electric motor. Motor activates a
series of drive belts. Belts power the moving parts of the unit--like w/ power steering and
alternator in automobile
Compression Chamber operation - ANSWERS-Air is compressed in compression chamber which
consists of a PISTON inside a CYLINDER. Piston moves up and down.
When piston moves down -->draws air into cylinder, through INTAKE VALVE (valve automatically
opens when piston moves down).
When piston moves up-->air is compressed (intake vale automatically closes to avoid air
escaping from cylinder).
