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FDNY A35 EXAM 2026-COMPREHENSIVE
Q&A FOR CERTIFICATION SUCCESS
What is the Filter and Moisture Separator Assembly (FMSA)? - correct-answer -A
device used to take moisture out of compressed air, it is installed between the air
compressor and the air receiver. A drain cock is attached to the FMSA to drain the
water and dust before it enters the receiver.
Moisture can cause problems when using compressed air to power machinery.
What is the Automatic Control Device? - correct-answer -A device attached to the
air receiver which controls the starting and stopping of the air compressor. It
shuts the compressor down when the air pressure in the receiver is sufficient, it
restarts the compressor if more pressure is needed.
What are Safety Relief Valves? - correct-answer -A device used to keep the air
compressor tank from bursting should the pressure switch stop working.
What is a Constant Speed Control Switch? - correct-answer -A device sometimes
installed on a system when there is a steady demand for compressed air, it allows
the compressor the run continuously at a safe speed while supplying the desired
amount of air. If demand drops the excess air is allowed to escape into the
atmosphere through the pressure release valve.
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Cooling Systems. - correct-answer -Cooling systems are installed in each unit. The
compression chamber and compressed air must be cooled to prevent the
compressor from overheating and causing serious damage.
Small compressors are air-cooled by a fan, Large compressors are water-cooled by
pumping cold water through the compressor.
Low oil indicator switch - correct-answer -Automatically shuts down compressor
when oil level is low. Do not operate the compressor if the oil level is low as this
can cause serious damage to the compressor.
What should you do before Maintenance and Repair? - correct-answer -The
compressor must be turned off, electrical supply shut down and the air drained.
Repair should be done by a qualified technician.
Minor repairs and maintenance - correct-answer -Can be preformed by certificate
holder. Examples are changing belts, air intake filter, lubrication oil, and must
know how to correct the cooling system.
Leaks and where they commonly are. - correct-answer -Certificate holder must
look and listen for leaks, leaks are more prominent during the colder months. Pay
attention to air receiver tank, compressor tubing and fittings.
FDNY A35 EXAM 2026-COMPREHENSIVE
Q&A FOR CERTIFICATION SUCCESS
What is the Filter and Moisture Separator Assembly (FMSA)? - correct-answer -A
device used to take moisture out of compressed air, it is installed between the air
compressor and the air receiver. A drain cock is attached to the FMSA to drain the
water and dust before it enters the receiver.
Moisture can cause problems when using compressed air to power machinery.
What is the Automatic Control Device? - correct-answer -A device attached to the
air receiver which controls the starting and stopping of the air compressor. It
shuts the compressor down when the air pressure in the receiver is sufficient, it
restarts the compressor if more pressure is needed.
What are Safety Relief Valves? - correct-answer -A device used to keep the air
compressor tank from bursting should the pressure switch stop working.
What is a Constant Speed Control Switch? - correct-answer -A device sometimes
installed on a system when there is a steady demand for compressed air, it allows
the compressor the run continuously at a safe speed while supplying the desired
amount of air. If demand drops the excess air is allowed to escape into the
atmosphere through the pressure release valve.
, 2|Page
Cooling Systems. - correct-answer -Cooling systems are installed in each unit. The
compression chamber and compressed air must be cooled to prevent the
compressor from overheating and causing serious damage.
Small compressors are air-cooled by a fan, Large compressors are water-cooled by
pumping cold water through the compressor.
Low oil indicator switch - correct-answer -Automatically shuts down compressor
when oil level is low. Do not operate the compressor if the oil level is low as this
can cause serious damage to the compressor.
What should you do before Maintenance and Repair? - correct-answer -The
compressor must be turned off, electrical supply shut down and the air drained.
Repair should be done by a qualified technician.
Minor repairs and maintenance - correct-answer -Can be preformed by certificate
holder. Examples are changing belts, air intake filter, lubrication oil, and must
know how to correct the cooling system.
Leaks and where they commonly are. - correct-answer -Certificate holder must
look and listen for leaks, leaks are more prominent during the colder months. Pay
attention to air receiver tank, compressor tubing and fittings.
