FDNY A-35 Exam with Verified Answers Graded A+
Air compressors power...
Examples of equipment powered by air
compressor
Air compressors enable...
Permit is required for air compressor
Types of air compressors
How do air compressors work
Most common air compressor
Air compressors are someti...
FDNY A-35 Exam with Verified Answers Graded A+
(1) industrial equipment and (2) con-
Air compressors power...
struction tools
Examples of equipment powered by air pneumatic wrenches, lifts in auto service
compressor stations, paint spray booths
(1) efficient repair of all types of vehicles;
Air compressors enable... and (2) facilitate their safe operation on
public thoroughfares
Permit is required for air compressor that compresses air above 100 PSI
(1) reciprocating;
(2) centrifugal;
(3) solar; and
Types of air compressors (4) rotary
*Difference is the way in which they com-
press air
take the air in a room and force it into
a container UNDER PRESSURE. The
more air forced into the container, the
How do air compressors work
greater the pressure. Compressed air
can be discharged from the container at
a controlled rate.
Most common air compressor Reciprocating
Air compressors are sometimes called air pumps
(1) electric motors;
Air compressors can be powered by: (2) internal combustion engines; or
(3) steam turbines
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 out-
Explosions & air compressors
ward. These gases are easily ignited by
sparks and high temperatures--which IN-
CLUDES the heat generated by an air
compressor.
, FDNY A-35 Exam with Verified Answers Graded A+
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
To avoid explosions w/ air compressors
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.
entire unit is driven by an electric motor.
Motor activates a series of drive belts.
Power to air compressor Belts power the moving parts of the
unit--like w/ power steering and alterna-
tor in automobile
Air is compressed in compression cham-
ber which consists of a PISTON inside a
CYLINDER. Piston moves up and down.
When piston moves down -->draws air
into cylinder, through INTAKE VALVE
Compression Chamber operation
(valve automatically opens when piston
moves down).
When piston moves up-->air is com-
pressed (intake vale automatically clos-
es to avoid air escaping from cylinder).
When air pressure reaches a certain lev-
el, it forces open a DISCHARGE VALVE
(which is spring loaded). This releases
Air Reciever Operation
compressed air into air reciever (aka
air tank), which is what supplies com-
pressed air when needed.
Single Stage Air Compressor with one cylinder and one piston
with more than one piston and cylinder.
Multi Stage Air Compressor Each cylinder will increase the pressure
of the air by taking air from the discharge
side of the previous cylinder and increas-
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