FDNY A-35 EXAM TEST WITH VERIFIED ANSWERS GRADED A+
5 views 0 purchase
Course
FDNY A-35
Institution
FDNY A-35
FDNY A-35 EXAM TEST WITH
VERIFIED ANSWERS GRADED A+
Air compressors power... - ️️ -(1) industrial equipment
and (2) construction tools
Examples of equipment powered by air compressor - ️️
-pneumatic wrenches, lifts in auto service stations,
paint spray booths
Air compressors enable.....
FDNY A-35 EXAM TEST WITH
VERIFIED ANSWERS GRADED A+ How do air compressors work - ✔️✔️-take the air in a
room and force it into a container UNDER PRESSURE.
Air compressors power... - ✔️✔️-(1) industrial equipment The more air forced into the container, the greater the
and (2) construction tools pressure. Compressed air can be discharged from the
container at a controlled rate.
Examples of equipment powered by air compressor -
✔️✔️-pneumatic wrenches, lifts in auto service stations, Most common air compressor - ✔️✔️-Reciprocating
paint spray booths
Air compressors are sometimes called - ✔️✔️-air pumps
Air compressors enable... - ✔️✔️-(1) efficient repair of all
types of vehicles; and (2) facilitate their safe operation on
public thoroughfares
Air compressors can be powered by: - ✔️✔️-(1) electric
motors;
(2) internal combustion engines; or
Permit is required for air compressor - ✔️✔️-that (3) steam turbines
compresses air above 100 PSI
Explosions & air compressors - ✔️✔️-If there is a build
Types of air compressors - ✔️✔️-(1) reciprocating; up of flammable gases (ex: in service stations and
(2) centrifugal; workshops), those gases are heavier than air and fall to
(3) solar; and the floor before spreading outward. These gases are
(4) rotary easily ignited by sparks and high temperatures--which
INCLUDES the heat generated by an air compressor.
*Difference is the way in which they compress air
, Air Reciever Operation - ✔️✔️-When air pressure
To avoid explosions w/ air compressors - ✔️✔️-Raise air reaches a certain level, it forces open a DISCHARGE
compressor at LEAST 5 feet above ground level so that VALVE (which is spring loaded). This releases
no flammable gases are drawn into the compressor. To compressed air into air reciever (aka air tank), which is
meet the height requirement you can place compressor what supplies compressed air when needed.
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.
Single Stage Air Compressor - ✔️✔️-with one cylinder
and one piston
Power to air compressor - ✔️✔️-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 Multi Stage Air Compressor - ✔️✔️-with more than one
steering and alternator in automobile piston and cylinder.
Each cylinder will increase the pressure of the air by
taking air from the discharge side of the previous cylinder
Compression Chamber operation - ✔️✔️-Air is and increasing the pressure to a new level. Once it
compressed in compression chamber which consists of a reaches the last level, the pressurized air is discharged
PISTON inside a CYLINDER. Piston moves up and into the reciever.
down.
When piston moves down -->draws air into cylinder,
through INTAKE VALVE (valve automatically opens As air is compressed it becomes - ✔️✔️-heated.
when piston moves down).
This is why in a multi stage air compressor there is an
When piston moves up-->air is compressed (intake vale intercooler between stages of compressor.
automatically closes to avoid air escaping from cylinder).
Exception to single stage/multi stage distinction - ✔️✔️-
CAVEAT: there are air compressors with multiple pistons
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller learndirect. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
