FDNY A-35 questions with answers graded A+ 2023

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FDNY A-35 questions with answers graded A+ 2023 Air compressors power... - Answer - (1) industrial equipment and (2) construction tools Examples of equipment powered by air compressor - Ans... wer - pneumatic wrenches, lifts in auto service stations, paint spray booths Air compressors enable... - Answer - (1) efficient repair of all types of vehicles; and (2) facilitate their safe operation on public thoroughfares Permit is required for air compressor - Answer - that compresses air above 100 PSI Types of air compressors - Answer - (1) reciprocating; (2) centrifugal; (3) solar; and (4) rotary *Difference is the way in which they compress air How do air compressors work - 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 - Answer - Reciprocating Air compressors are sometimes called - Answer - air pumps Air compressors can be powered by: - Answer - (1) electric motors; (2) internal combustion engines; or (3) steam turbines Explosions & air compressors - 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 - 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 - 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 - 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 [Show More]

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