Non-condensables in a refrigerant cylinder are best described as which?

Prepare for the HVAC EPA Type I Test. Study with flashcards and multiple choice questions, each with hints and explanations. Get ready to excel in your exam!

Multiple Choice

Non-condensables in a refrigerant cylinder are best described as which?

Non-condensables are gases that will not condense at the temperatures and pressures the system operates at. In a refrigerant cylinder, any gas that stays in the vapor phase and doesn’t turn into liquid during service—such as trapped air—is a non-condensable. They don’t condense like the refrigerant does in the condenser, so they occupy space, raise pressures, and reduce efficiency. Water vapor would condense, liquid refrigerant is not a gas, and oil residue is a liquid contaminant—not a non-condensable gas.

Non-condensables are gases that will not condense at the temperatures and pressures the system operates at. In a refrigerant cylinder, any gas that stays in the vapor phase and doesn’t turn into liquid during service—such as trapped air—is a non-condensable. They don’t condense like the refrigerant does in the condenser, so they occupy space, raise pressures, and reduce efficiency. Water vapor would condense, liquid refrigerant is not a gas, and oil residue is a liquid contaminant—not a non-condensable gas.

More practice questions