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MODERN REFRIGERATION AND AIR CONDITIONING, 21ST EXAM QUESTIONS WITH ACTUAL CORRECT VERIFIED ANSWERS NEWEST EDITION REVISED BY EXPERTS $18.99
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MODERN REFRIGERATION AND AIR CONDITIONING, 21ST EXAM QUESTIONS WITH ACTUAL CORRECT VERIFIED ANSWERS NEWEST EDITION REVISED BY EXPERTS
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MODERN REFRIGERATION AND AIR CONDITIONING, 21ST EXAM QUESTIONS WITH ACTUAL CORRECT VERIFIED ANSWERS NEWEST EDITION REVISED BY EXPERTSMODERN REFRIGERATION AND AIR CONDITIONING, 21ST EXAM QUESTIONS WITH ACTUAL CORRECT VERIFIED ANSWERS NEWEST EDITION REVISED BY EXPERTSMODERN REFRIGERATION AN...

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  • August 6, 2024
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  • 2024/2025
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MODERN REFRIGERATION AND AIR CONDITIONING, 21ST EXAM QUESTIONS
WITH ACTUAL CORRECT VERIFIED ANSWERS NEWEST EDITION REVISED BY
EXPERTS




Section 2: Refrigeration System Fundamentals; Chapter 4: Energy and Matter



Tabs: Specific Heat (PG 59), Heat Transfer (PG 63), Basic Refrigeration Components (PG 85)




A substance's mass per unit of volume is it's___________.

Density (Modern Refrigeration PG 54)




The heat required to raise the temperature of one pound a substance by a one degree Fahrenheit is
known as what?

Specific heat (Modern Refrigeration PG 59)




What is a British thermal unit (BTU or Btu) defined as?

The amount of heat required to raise the temperature of one pound of water by one degree
Fahrenheit

(Modern Refrigeration PG 60)




_________, as it is used in refrigeration, is the total amount of heat in a substance, calculated from an
accepted reference.

,Enthalpy (Modern Refrigeration PG 62)




__________ is the flow of heat through a material due to molecular vibrations in the material.

Conduction (Modern Refrigeration PG 63)




_________ is the transfer of heat by heat rays

Radiation (Modern Refrigeration PG 63)




___________ is the movement of heat from one place to another by way of a liquid or gas.

Convection (Modern Refrigeration PG 63)




Heat that brings about a change of state with no change in temperature is called what?

Latent Heat (Modern Refrigeration PG 64)




__________ is heat that changes the temperature of a substance

Sensible (Modern Refrigeration PG 65)




What is the latent heat of vaporization for water?

970 Btu/lb (Modern Refrigeration PG 65)




What is one ton of refrigerant equivalent to?

Is equal to 12,000 Btu per hour

,Is equal to 200 Btu per minute

Is equal to 288,000 Btu per 24 hours

Represents the amount of heat energy absorbed when one ton (2000 lb) of ice melts during one 24
hour day.

(Modern Refrigeration PG 66)




When referring to a system's capacity, most technicians define a ton of refrigeration as ________.

12,000 BTUh (Modern Refrigeration PG 66)




A ton of refrigeration represents the amount of heat energy absorbed when one ton (2000 lb) of ice
melts __________.

During one 24 hour day (Modern Refrigeration PG 66)




What is the latent heat of fusion for ice?

(Modern Refrigeration PG 66)




Which law states that when pressure is raised in a confined fluid, there is an equal increase at every
other point in the container?

Pascal's law (Modern Refrigeration PG 72)




The __________ of a substance is the temperature at and above which vapor of the substance cannot be
liquefied, no matter how much pressure is applied to it.

Critical temperature (Modern Refrigeration PG 73)

, Water boils _________ as the pressure increases.

Slower (Modern Refrigeration PG 73)




What affects the temperature a refrigerant will vaporize?

Pressure (Modern Refrigeration PG 73)




What affects the temperature that a refrigerant will vaporize?

Pressure (Modern Refrigeration PG 73)




What does PSIA mean?

Absolute pressure (Modern Refrigeration PG 75)




What tool is used to measure atmospheric pressure?

Barometer (Modern Refrigeration PG 75)




PSIG is always ______ than PSIA.

Lower (Modern Refrigeration PG 75)




What is the absolute atmosphere pressure (psia) at sea level?

14.7 psia (Modern Refrigeration PG 75 and 1537)




What is the formula for gas absolute pressure?

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