RETA Industrial Refrigeration Book 2 Exam

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RETA Industrial Refrigeration Book 2 Exam Newest 2025 Complete 200 Questions And Correct Answers (Verified Answers) |Already Graded A+

Wet bulb temperatures? (pg. 3-6)

• Require increased evaporative condenser capacity if they are high
• Require increased evaporative condenser capacity if they are low
• Cannot be used to determine the dew point
• Can be determined without using a thermometer - ANSWER-A)

Require increased evaporative condenser capacity if they are high

Cold air? (pg. 3-10)

• Is lighter than warm air
• Is heavier than warm air
• Holds more moisture than warm air
• Increases pressure in a freeze - ANSWER-B) Is heavier than warm

air

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If the dry bulb temperature is 80°F and the RH is 30%, what is the wet bulb temperature? (pg. 3-12)

A) 80°F

B) 60°F

C) 70°F

D) 68°F - ANSWER-B) 60°F

If the RH is 100% and the wet bulb temperature is 70°F, what is the dry bulb temperature? (pg. 3-12)

A) 84°F

B) 60°F

C) 70°F

D) 65°F - ANSWER-C) 70°F

If the dry bulb temperature is 75°F and the RH is 35%, what is the enthalpy per pound of dry air? (pg. 3-12)

• 8 BTU/pound
• 25 BTU/pound
• 2.5BTU/pound
• 46 BTU/pound - ANSWER-B) 25 BTU/pound

If the dry bulb temperature is 72°F and the wet bulb temperature is 65°F, what is the relative humidity? (pg. 3-12) 2 / 4

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A) 61%

B) 65%

C) 70%

D) 30% - ANSWER-C) 70%

If the dry bulb temperature is 75°F and the wet bulb temperature is 70°F, what is the volume of a pound of the air? (pg. 3-12)

• 14.2 cubic feet
• 14.0 cubic feet
• 13.8 cubic feet
• 13.6 cubic feet - ANSWER-C) 13.8 cubic feet

If the dry bulb temperature is 87°F and the RH is 20%, what is the humidity ratio in grains of moisture? (pg. 3-12)

• 43 grains of moisture
• 0.28 grains of moisture
• 42 grains of moisture
• 38 grains of moisture - ANSWER-D) 38 grains of moisture

If the dry bulb temperature is 85°F and the RH is 30%, what is the dew point temperature? (pg. 3-12)

A) 54°F

B) 50°F 3 / 4

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C) 64°F

D) 44°F - ANSWER-B) 50°F

Air with a relative humidity of 62% means that? (pg. 3-3)

• The air contains 62% of the water vapor it could hold at the present

temperature

• The air can absorb 62% more water vapor at the present temperature
• The air can absorb 38% more water vapor if the temperature is

reduced

• The air can absorb 38% more water vapor if the temperature is

increased - ANSWER-A) The air contains 62% of the water vapor it could hold at the present temperature

If the dry bulb temperature is 99°F and the RH is 40%, what is the vapor pressure of the water vapor in inches Hg? (pg. 3-12)

• 0.70" Hg
• 0.80" Hg
• 0.65" Hg
• 0.75" Hg - ANSWER-D) 0.75" Hg

Dry air is? (pg. 3-5)

• Air that has zero moisture content
• The reciprocal of air density
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