Residential HVAC Installation Practice Exam

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Prepare for the Residential HVAC Installation Exam with this comprehensive quiz. Test your knowledge with multiple-choice questions and get ready to excel in your HVAC installation career.

Practice this question and more.

What are the clearance tolerances related to the use of ordinary clean refrigerant oil in a vacuum pump?

It is not recommended
It is only suitable at specific temperatures
It can be used satisfactorily
It is prohibited

The correct answer is: It can be used satisfactorily

Ordinary clean refrigerant oil can generally be used satisfactorily in a vacuum pump, as long as it is not contaminated by moisture or other impurities. Option A is incorrect because while it may not be recommended, it is still commonly used. Option B is incorrect because the suitability does not depend on specific temperatures. Option D is incorrect because it is not strictly prohibited, although certain types of oils may not be compatible with certain vacuum pump systems and precautions should be taken.