Question 1
A school bus A/C system uses R-134a. Which refrigerant identifier and service practice applies?
Correct Answer:
R-134a is a non-flammable HFC requiring SAE J2788 recovery/recycling equipment
Question 2
Before opening any school bus A/C refrigerant line for service, the technician must first:
Correct Answer:
Recover the refrigerant with certified recovery equipment
Question 3
A manifold gauge set connected to a school bus A/C system reads high on the low side and low on the high side with the compressor running. The most likely cause is:
Correct Answer:
Internal compressor problem (failed reed valves or worn pump)
Question 4
The correct way to determine the refrigerant charge for a school bus A/C system is to:
Correct Answer:
Charge by weight per the manufacturer underhood label or service data
Question 5
A bus A/C system is being evacuated. The purpose of the vacuum (evacuation) step is to:
Correct Answer:
Remove air and boil off moisture before recharging
Question 1
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About this Exam

Prepare with the ASE S7 Air Conditioning Systems & Controls (School Bus) Practice Questions - ASE S7 - Air Conditioning Systems & Controls (School Bus) Certification Exam practice quiz. This question bank includes 100 questions covering compressor, school, refrigerant, cooling, and cause. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ASE S7 Air Conditioning Systems & Controls (School Bus) Practice Questions - ASE S7 - Air Conditioning Systems & Controls (School Bus) Certification Exam

This practice set contains 100 questions from the matching question bank and focuses on compressor, school, refrigerant, cooling, and cause. 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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