BITS Pilani AC Technician Interview Questions and Answers

Q1. What is the back pressure for refrigerant R-134a?
Ans. 
The back pressure for refrigerant R-134a is typically around 60 psi.
• The back pressure for R-134a is usually maintained around 60 psi to ensure proper functioning of the HVAC system.

• Back pressure is the pressure in the low side of the system, which helps in the cooling process.

• Maintaining the correct back pressure is crucial for the efficiency and performance of the HVAC system.
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Q2. What are the different types of compressors?
Ans. 
Different types of compressors include reciprocating, rotary, scroll, and centrifugal compressors.
• Reciprocating compressors use pistons to compress air.

• Rotary compressors use rotating mechanisms to compress air.

• Scroll compressors use spiral elements to compress air.

• Centrifugal compressors use high-speed rotating impellers to compress air.
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Q1. Will you be comfortable staying away from home for the job?
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Q2. Are you willing to travel?
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