Question 1
What are the three main types of compressors classified by their housing?
Correct Answer:
Open (external drive), semi-hermetic (serviceable), and hermetic (welded/sealed)
Question 2
What is the primary function of compressor oil in a refrigeration system?
Correct Answer:
To lubricate moving parts, seal clearances, and help cool the compressor motor
Question 3
What damage can liquid slugging cause to a reciprocating compressor?
Correct Answer:
It can break valves, connecting rods, and the crankshaft because liquids are incompressible
Question 4
What is a scroll compressor and what are its advantages?
Correct Answer:
A compressor using two spiral-shaped scrolls (one fixed, one orbiting) that trap and compress gas; advantages include fewer moving parts, lower noise, and higher efficiency
Question 5
What is the purpose of a crankcase heater on a compressor?
Correct Answer:
To keep the compressor oil warm during off cycles, preventing refrigerant migration and liquid slugging on startup
Question 1
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About this Exam

Prepare with the Red Seal Refrigeration and Air Conditioning Mechanic (313A) practice quiz. This question bank includes 30 questions covering compressor, hvac, refrigeration, evaporator, and function. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Red Seal Refrigeration and Air Conditioning Mechanic (313A)

This practice set contains 30 questions from the matching question bank and focuses on compressor, hvac, refrigeration, evaporator, and function. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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