Title: Unit 12 Quiz
Course: HAC 131 Refrigeration & Air Conditioning 1 > Section: HAC 131 Refrigeration & Air Conditioning 1

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

The best method for leak detection is when?
- unit is chagrged with refrigerant
- unit is pressurized with nitrogen to 150 psig
- using a halide leak detector
- using an ultrasound leak detector
A: unit is pressurized with nitrogen to 150 psig

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

When mositure is present in the system it causes?
- acid
- foam
- leaks
- all of the above
A: acid

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

Pulling a vaccum means to _________________.
- show pressure below zero
- remove moisture
- remove non-condensables
- all of the above
A: all of the above

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

The compound gauge is the _______________.
- low pressure gauge
- is the high side
- reads below zero in a vacuum
- low pressure gauge and reads below zero in a vacuum
A: low pressure gauge and reads below zero in a vacuum

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

When pulling a vaccum you should use ______________.
- only one manifold hose
- recovery machine
- schrader valves
- a micron gauge
A: a micron gauge

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

Multipe evacuation means ________________.
- pressurize with nitrogen between vaccums
- evacuate multipe times
- purge with refrigerant between vaccums
- all of the above
A: pressurize with nitrogen between vaccums

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

The maximum recommended test pressure for the low side of the system is ______________.
- 175 psig
- 150 psig
- 100psig
- 150 psia
A: 150 psig

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

A deep vaccum happens when pulling below _______________.
- 500 microns
- 500 mm Hg
- 250 mm Hg
- 250 microns
A: 500 microns

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

It is good practice to remove the ______________ during evacuation.
- gauge hoses
- service valves
- schrader valves
- all of the above
A: schrader valves

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

Sludge is present when ____________ are present.
- oil
- moisture
- acid
- all of the above
A: all of the above

Q: MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.

When a leak is present, you should always perform ________________________.
- some form of leak detection
- evacuation
- a clean and tune
- charge the system
A: some form of leak detection