RETA Industrial Refrigeration Book 3 Exam

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RETA Industrial Refrigeration Book 3 Exam Newest 2025 Complete 200 Questions And Correct Answers (Verified Answers) |Already Graded A+

A spring loaded self-closing valve could be part of an oil sampling manifold if? (pg. 3-4)

• A spiral tube is downstream of the ball valve
• The fittings upstream of the valve can handle the torque applied to

hold the valve open

• The MP calls for it
• The ball section is vented - ANSWER-B) The fittings upstream of the

valve can handle the torque applied to hold the valve open

Which statement is NOT true about lowering the discharge pressure on a condenser by running the evaporative condenser at full load? (pg. 4-6)

• You can lower the head pressure so low that it will cause other

system problems

• Lowering the head pressure while keeping the suction pressure

constant will reduce the amount of horsepower required by the compressor saving energy 1 / 4

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• Lowering the head pressure will save wear and tear on the

compressor

• Lowering the head pressure will always make the system more

efficient and cost less to run - ANSWER-D) Lowering the head pressure will always make the system more efficient and cost less to run

Which of these statements are true about passivation in an evaporative condenser? (pg. 4-18)

• During passivation you should keep the pH as low as possible,

preferably between 1 and 2

• You should keep the pH between 7 and 8 during passivation
• You are only concerned about passivating the tubes in an evaporator

condenser

• After a condenser has been properly passivated, you never have to

worry about white rust again - ANSWER-B) You should keep the pH between 7 and 8 during passivation

Which is NOT a cause of scale formation on the evaporative condenser tubes? (pg. 4-18)

• Improper water treatment
• Plugged spray or partially plugged spray nozzles
• Improper passivation of a new condenser
• Not enough bleed water going down the drain - ANSWER-C)

Improper passivation of a new condenser

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The purpose of the eliminators in an evaporative condenser is? (pg. 4- 21)

• To eliminate the formation of scale on the tubes of the condenser
• To prevent or eliminate the possibility of the water pumps cavitating

due to air entrainment

• To prevent the formation of white rust
• To prevent water droplets from being blown from the condenser -

ANSWER-D) To prevent water droplets from being blown from the condenser

The primary functional difference between a cooling tower and an evaporative condenser is where the? (pg. 4-7)

• Refrigerant condenses
• Where the unit must be shut down
• Water distribution system is located
• Filtration stream will be collected - ANSWER-A) Refrigerant

condenses

What are the two types of condenser designs for air flow? (pg. 4-23)

• Forced draft and induced draft
• Forced draft and up draft
• Up draft and down draft
• Centrifugal and axial - ANSWER-A) Forced draft and induced draft
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Compressor efficiency increases when condensers? (pg. 4-6)

• Use water on days with very high wet bulb
• Lower discharge pressure
• Are bottled up with liquid
• Let the discharge pressure rise - ANSWER-B) Lower discharge

pressure

One of the most common causes of poor condenser performance is? (pg.

4-19,21)

• Loose belt on the fans
• Too much fans horsepower used
• Scale on the condenser tube bundle
• Too much water in the sump - ANSWER-C) Scale on the condenser

tube bundle

If you are having problems with the capacity of your condenser, you should check? (pg. 4-22)

• Wet bulb temperature of the inlet air compared to the surrounding

area

• The fit of the eliminators
• Motor horsepower
• For white rust buildup in the condenser - ANSWER-A) Wet bulb

temperature of the inlet air compared to the surrounding area

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