HVAC Random 25-01

HVAC Random 25-01

Professional Development

25 Qs

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HVAC Random 25-01

HVAC Random 25-01

Assessment

Quiz

Other

Professional Development

Practice Problem

Medium

Created by

Johnny Thulin

Used 17+ times

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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Heat of fusion of water, is the heat released from a substance to change irt from a liquid state to a solid state. The heat of fusion of ice is ___ Btu per pound.

144
109
42
31

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Select one of the most common result produced by a small difference in a system.

short cycling
temperatures that are too low
long off periods
an iced coil

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Avoid contact with contaminated lubricant from a hermetic system that is dirty and smells bad because it may be

acidic
explosive
phosgenic
radioactive

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In many condensing unit applications, it is necessary to heat the compressor to evaporate liquid refrigerant trapped in the oil. Most large compressors for commercial applications are manufactured and equipped to handle this situation using a ___.

crankcase heater
low temperature heating circuit
high temperature cooling circuit
off cycle oil pressure reducer

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a sling psychrometer measure directly?

temperature and dew point
heat and cold
gain and drops
wet bulb and dry bulb

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Materials within plenums shall be noncombustible or shall have a smoke-developed index of NOT MORE THAN ____ when tested in accordance with ASTME E 84.

450
250
50
25

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which component may be added to a refrigeration system to prvent moisture from entering the compressor?

receiver
accumulator
liquid line filter drier
crankcase pressure regulator

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