FDNY A-35 Exam Questions and Correct Answers 2024/2025 Rated 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 1 / 2
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).When piston moves up-->air is compressed (intake vale automatically closes to avoid air escaping from cylinder).Air Reciever Operation - Correct Answer When air pressure reaches a certain level, it forces open a DISCHARGE VALVE (which is spring loaded). This releases compressed air into air reciever (aka air tank), which is what supplies compressed air when needed.Single Stage Air Compressor - Correct Answer with one cylinder and one piston Multi Stage Air Compressor - Correct Answer with more than one piston and cylinder.
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