FDNY A35 Exam Question and Answer |
Comprehensive Review with Detailed
Rationales | Grade A+
• Air compressors power... CORRECT ANSWER: (1) industrial equipment and
(2) construction tools
• Examples of equipment powered by air compressor CORRECT ANSWER:
pneumatic wrenches, lifts in auto service stations, paint spray booths
• Air compressors enable... CORRECT ANSWER: (1) efficient repair of all types
of vehicles; and (2) facilitate their safe operation on public thoroughfares
• Permit is required for air compressor CORRECT ANSWER: that compresses air
above 100 PSI
• Types of air compressors CORRECT ANSWER: (1) reciprocating;
(2) centrifugal;
(3) solar; and
(4) rotary
*Difference is the way in which they compress air
• 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.
, • Most common air compressor CORRECT ANSWER: Reciprocating
• Air compressors are sometimes called CORRECT ANSWER: air pumps
• Air compressors can be powered by: CORRECT ANSWER: (1) electric motors;
(2) internal combustion engines; or
(3) steam turbines
• 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.
• 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.
• 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
• 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).
Comprehensive Review with Detailed
Rationales | Grade A+
• Air compressors power... CORRECT ANSWER: (1) industrial equipment and
(2) construction tools
• Examples of equipment powered by air compressor CORRECT ANSWER:
pneumatic wrenches, lifts in auto service stations, paint spray booths
• Air compressors enable... CORRECT ANSWER: (1) efficient repair of all types
of vehicles; and (2) facilitate their safe operation on public thoroughfares
• Permit is required for air compressor CORRECT ANSWER: that compresses air
above 100 PSI
• Types of air compressors CORRECT ANSWER: (1) reciprocating;
(2) centrifugal;
(3) solar; and
(4) rotary
*Difference is the way in which they compress air
• 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.
, • Most common air compressor CORRECT ANSWER: Reciprocating
• Air compressors are sometimes called CORRECT ANSWER: air pumps
• Air compressors can be powered by: CORRECT ANSWER: (1) electric motors;
(2) internal combustion engines; or
(3) steam turbines
• 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.
• 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.
• 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
• 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).
