Amity University Hvac Technician Interview Questions and Answers

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.

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.