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Refrigeration Machine Operator Final Exam Study Guide Questions and Answers
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Specific Heat is - Answer-the amount of heat necessary to raise the temperature of a substance one deg F What are two types of heat - Answer-sensible and latent Heat flow by conduction is - Answer-energy travelling from one molecule to another Radiation can be defined as - Answer-transfer ...

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  • September 10, 2024
  • 10
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • refrigeration machine operator final exam study gu
  • specific heat is answer the amount of heat neces

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Refrigeration Machine Operator Final
Exam Study Guide Questions and
Answers
Specific Heat is - Answer-the amount of heat necessary to raise the temperature of a
substance one deg F

What are two types of heat - Answer-sensible and latent

Heat flow by conduction is - Answer-energy travelling from one molecule to another

Radiation can be defined as - Answer-transfer of heat through the air without heating
the air and is absorbed by a solid object

Water freezes at - Answer-32 deg f

Refrigeration is - Answer-the tranfer of heat from a place where it is not wanted to a
place where it is less objectionable

Heat flows from - Answer-hot to cold

A btu is - Answer-British Thermal Unit

A btu can be defined as - Answer-the amount of heat required to raise one lb of water
one deg f

What is the definition of temperature - Answer-the measure of the intensity of heat

Absolute zero is - Answer--460 deg f

Atmospheric pressure at sea level is - Answer-14.7 psi

32 deg f equals - Answer-0 deg c

70 deg f equals - Answer-21.1 deg c

100 deg C equals - Answer-212 deg f

Water boils at - Answer-212 deg f

A rise in sensible heat causes - Answer-a change of temperature of a substance

Latent heat causes - Answer-a change of state

, The amount of heat required to raise two pounds of ice two deg f is - Answer-2 btu

As the temperature of a substance increases the molecules in the material - Answer-
travel faster

PSIG indicates - Answer-pounds per square inch gauge

How many btus are required to change one lb of ice at 20 deg f to one lb of steam at
220 deg f - Answer-1304 btu

Which of the following represents a differnet temperature than the other three - Answer-
475 deg k

What is 24 psig in absolute pressure - Answer-38.7 psia

The pressure exerted by a block of steel is - Answer-downward

The latent heat of vaporization of water is - Answer-970.3 btu/lb

the specific heat of ice is - Answer-.5 btu/lb

The specific heat of steel is .116 btu/lb. if we have 1000 lbs of steel that must be heated
to 100 degrees f from 30 degrees f, how many btus are needed? - Answer-8120

How many btus are required to raise 10 lbs of ice from 20 deg f to water at 70 deg f -
Answer-1980

How many btus are required to raise 20 lbs of water from 70 deg f to steam at 250 deg f
- Answer-22,000

Water weighs - Answer-62.4 lbs/ft2

the device used to measure pressure in a closed system is a - Answer-bourdon tube

the purpose of the piping in a refrigeration system is - Answer-to give a path for
refrigerant to flow

Acr pipe is measure in - Answer-outside diameter

Two methods of cutting ACR copper - Answer-tubing cutter and hack saw

a copper flare for refrigeration is - Answer-45 deg

Soft soldering is done at - Answer-500 deg f

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