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FDNY A35 EXAM QUESTI ONS AND
ANSWERS 100% PASS
Question :Air compressors power...
Correct answer:(1) industrial equipment and (2)
construction tools
Question :Examples of equipment powered by air
compressor
Correct answer:pneumatic wrenches, lifts in auto service
stations, paint spray booths
Question :Air compressors enable...
Correct answer:(1) efficient repair of all types of vehicles;
and (2) facilitate their safe operation on public thoroughfares
Question :Permit is required for air compressor
Correct answer:that compresses air above 100 PSI
Question :Types of air compressors
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Correct answer:(1) reciprocating;
(2) centrifugal; (3) solar; and (4) rotary
*Difference is the way in which they compress air
Question :How do air compressors work
Correct answer: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.
Question :Most common air compressor
Correct answer:Reciprocating
Question :Air compressors are sometimes called
Correct answer:air pumps
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Question :Air compressors can be powered by:
Correct answer:(1) electric motors;
(2) internal combustion engines; or (3) steam turbines
Question :Explosions & air compressors
Correct answer: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.
Question :To avoid explosions w/ air compressors
Correct answer: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.
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Question :Power to air compressor
Correct answer: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
Question :Compression Chamber operation
Correct answer: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).
