RETA Industrial Refrigeration Book 1 Exam

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RETA Industrial Refrigeration Book 1 Exam Newest 2025 Complete 200 Questions And Correct Answers (Verified Answers) |Already Graded A+

A gallon of milk weights 8 pounds. If it leaves the cow at 90°F and must be cooled to 35°F, how many BTUs must be removed in the cooling process? (pg. 1-40)

• 409 BTUs
• 40.9 BTUs
• 440 BTUs
• 51.15 BTUs - ANSWER-Q = M x Cp x Change in Temp.

Q = 8 x 0.93 x 55 = 409 BTUs

• 409 BTUs

A meat plant process 100 animals a day with an average processed weight of 750 pounds of beef per animal. The meat must be cooled to 45°F from 85°F. How many BTUs must be removed in the cooling process? (pg. 1-40)

• 3,000,000 BTUs
• 2,205,000 BTUs
• 220,500 BTUs
• 55,125 BTUs - ANSWER-Q = M x Cp x Change in Temp. 1 / 4

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Q = (100 animals x 750lbs. x 0.735 x (85 - 45) = 2,205,000 BTUs

• 2,205,000 BTUs

A vapor can NOT be? (pg. 1-30)

• Compressed
• Superheated
• Subcooled
• Saturated - ANSWER-C) Subcooled

What kind of a measure is a ton of refrigeration? (pg. 1-39)

• An amount in pounds
• A rate of heat transfer in BTUs per unit of time
• A quantity in BTUs
• A measure of energy in BTUs per pound - ANSWER-B) A rate of

heat transfer in BTUs per unit of time

How many degrees Fahrenheit is equal to -6.7 degrees Celsius? (pg. 1- 19)

A) 32°F

B) 20°F

C) -20°F

• -12°F - ANSWER-Fahrenheit = (9 x Celsius) / 5) + 32

Fahrenheit = (9 x -6.7)/5) + 32 = 20 2 / 4

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B) 20°F

The condition of a liquid that exists at a temperature below its boiling point is? (pg. 2-12)

• Superheated
• Subcooled
• Saturated
• Permeated - ANSWER-B) Subcooled

Why does the refrigerant in the condenser change state from vapor to liquid? (pg. 2-4)

• The pressure is decreased by the compressor
• The refrigerant runs down into the receiver
• The refrigerant loses heat energy to the surrounding environment
• The fans increase the pressure to above saturation - ANSWER-C)

The refrigerant loses heat energy to the surrounding environment

The expansion valve controls only one of the items below. Which is it?(pg. 2-2)

• The flow of liquid into the evaporator
• The pressure in the evaporator
• The pressure in the receiver 3 / 4

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• The system operating pressure - ANSWER-A) The flow of liquid into

the evaporator

Which of the following is a true statement? (pg. 2-16/17)

• 10 PSIA is greater than 10 PSIG
• 10 PSIG is equal to 10 PSIA
• 10 PSIG is a greater pressure than 10 PSIA
• 10 PSIG and 10 PSIA use different scales and therefore cannot be

compared in this way - ANSWER-C) 10 PSIG is a greater pressure than

10 PSIA

Flash gas is? (pg. 2-2)

• Only the gas created at the expansion device
• The gas used to defrost evaporators that use gas defrost systems
• The gas created anytime liquid refrigerant evaporates
• A flammable refrigerant gas - ANSWER-A) Only the gas created at

the expansion device

Which of the answers below is an example of a pressure drop? (pg. 2- 21)

• The difference in pressure due to refrigerant "dropping" in a vertical

pipe riser

• In a compressor, the difference in pressure when the piston is at top

dead center and bottom dead center

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