FDNY A-35 EXAM LATEST 2023-2024 WITH 40
BEST PRACTICE QUESTIONS AND VERIFIED
CORRECT ANSWERS/GRADED A+
FDNY Permit - ANSWER>>permit required if compressor is used to compress any nonflammable,
corrosive or oxidizing gas, including air to a pressure exceeding 100 psi
Types of air compressors - ANSWER>>reciprocating, centrifugal, rotary and solar compressors
Drive belts - ANSWER>>belts on a compressor that power moving parts of the unit
Compression Chamber - ANSWER>>the chamber that air is compressed into. Consist of a piston inside a
cylinder. The piston moves up and down. When the piston moves downward it draws air into the
cylinder. The Air is drawn through an intake valve. The intake valve automatically opens when the piston
moves downward.
Discharge valve - ANSWER>>a spring loaded valve that is forced open when pressure reaches a certain
level. This valve allows air to move into an air receiver
Single Stage Air Compressor - ANSWER>>with one cylinder and one piston
Multi Stage Air Compressor - ANSWER>>with more than one piston and cylinder.
Each cylinder will increase the pressure of the air by taking air from the discharge side of the previous
cylinder and increasing the pressure to a new level. Once it reaches the last level, the pressurized air is
discharged into the receiver.
Intercooler - ANSWER>>a heat exchange device designed to cool compressed gas between the stages of
a multistage compressor
Unloading valve - ANSWER>>safety component.
allows air to escape compression chamber when there is a strain on the electrical motor. This usually
occurs in the first few cycles when the compressor is first started.
Automatic in most systems but it may be manual in older compressors. Follow instruction manual for old
compressor.
BEST PRACTICE QUESTIONS AND VERIFIED
CORRECT ANSWERS/GRADED A+
FDNY Permit - ANSWER>>permit required if compressor is used to compress any nonflammable,
corrosive or oxidizing gas, including air to a pressure exceeding 100 psi
Types of air compressors - ANSWER>>reciprocating, centrifugal, rotary and solar compressors
Drive belts - ANSWER>>belts on a compressor that power moving parts of the unit
Compression Chamber - ANSWER>>the chamber that air is compressed into. Consist of a piston inside a
cylinder. The piston moves up and down. When the piston moves downward it draws air into the
cylinder. The Air is drawn through an intake valve. The intake valve automatically opens when the piston
moves downward.
Discharge valve - ANSWER>>a spring loaded valve that is forced open when pressure reaches a certain
level. This valve allows air to move into an air receiver
Single Stage Air Compressor - ANSWER>>with one cylinder and one piston
Multi Stage Air Compressor - ANSWER>>with more than one piston and cylinder.
Each cylinder will increase the pressure of the air by taking air from the discharge side of the previous
cylinder and increasing the pressure to a new level. Once it reaches the last level, the pressurized air is
discharged into the receiver.
Intercooler - ANSWER>>a heat exchange device designed to cool compressed gas between the stages of
a multistage compressor
Unloading valve - ANSWER>>safety component.
allows air to escape compression chamber when there is a strain on the electrical motor. This usually
occurs in the first few cycles when the compressor is first started.
Automatic in most systems but it may be manual in older compressors. Follow instruction manual for old
compressor.
