Exam 7: Compressed Air System Technology

What is the difference between an automatic unloader and a pressure switch?

A(n) ____, mounted on the motor shaft, acts on the diaphragm plate to pull the diaphragm up and down.

A compressor air valve on the bottom of the tank allows for water to be drained off.

The part that is MOST-Likely used to convert the connections on the hose and other equipment from one thread size to another is:

In a compressor, ____ is the capacity of the motor or engine that drives the compressor.

While having a discussion about compressor crankcase oil, Technician A says that under clean operating conditions, the oil should be changed at the end of 200 running hours or every three months, whichever occurs first.Technician B says that the oil should be changed at the end of 900 running hours or every eight months, whichever occurs first.Who is correct?

The ____ is a heavy-gauge steel tank for holding an extra supply of compressed air.

An automatic dump trap, installed at the lowest point below the air receiver, collects condensed moisture.

When air is drawn from the atmosphere and compressed in a single stroke, the compressor is referred to as a(n) ______________________________.

____ is the volume of the air being delivered by the compressor to the air tool.

Two-stage compressors are usually more efficient, run cooler, and deliver more air for the power consumed, particularly in the 100 to 200 psi (689 to 1,378 kPa) pressure range.

Which of the following is LEAST-Likely a characteristic of an air transformer?

Pounds per square inch (psi) is the measure of air pressure or force delivered by the compressor to the air tool.

What are the steps involved in installing a compression ring connection?

A(n) ____ is used to couple two pieces of hose or pipe together or to convert a female connection of one size thread to a male connection of another size thread.

If the cfm of a compressor is too low for demand, the pump will not be able to keep up.

All of the following are components of an air filter EXCEPT:

Two-stage compressor units normally are used in pressure ranges up to 125 psi (861 kPa) for intermittent service.

Which of the following air system maintenance procedures should MOST-Likely be part of your daily routine?

____ is the theoretical amount of air in cubic feet that the compressor can pump in one minute.