Unit 8

Unit 8

Professional Development

•

30 Qs

quiz-placeholder

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Unit 8

Unit 8

Assessment

Quiz

•

Professional Development

•

Professional Development

•

Practice Problem

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Medium

Created by

Timothy McIntyre

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30 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The best method of leak checking is when the refrigeration system is ____.

in a vacuum

open to the atmosphere

operating with all fans activated

standing with dry nitrogen pressure of 150 psig in the system

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

When moisture is present in a refrigeration system, it will react with the refrigerant and the oil to form ____.

acid

carbon dioxide

carbon monoxide

carbolic acid

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Non-condensable gases ____.

are desirable in a refrigeration system

are undesirable in a refrigeration system

condense readily under normal atmospheric conditions

help in pulling a vacuum

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

To pull a vacuum means to ____.

lower the pressure in a refrigeration system below atmospheric

raise the pressure in a refrigeration system

allow refrigerant to escape into the atmosphere

condense the gas in the system

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A compound gauge ____.

indicates pressures above 14.696 psia

indicates pressures in inches Hg below atmospheric pressure

is one of two gauges on a typical gauge manifold

All of the above.

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A micron gauge is used to measure ____.

atmospheric pressures at high altitudes

atmospheric pressures at sea level

absolute pressures below 1 mm Hg

high pressure in a refrigeration system

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

At what pressure range does the technician valve off the vacuum pump when evacuating to a deep vacuum?

200 to 100 microns.

500 to 200 microns.

300 to 200 microns.

500 to 300 microns.

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