Question 145Refrigeration & AC - QMED

The correct answer is B) odorless gas. R-134a, also known as tetrafluoroethane, is a refrigerant gas that is commonly used in various applications, including air conditioning systems. At ambient temperature and atmospheric pressure, R-134a exists in a gaseous state. It is an odorless, colorless, and non-flammable gas, making it the correct choice for the given scenario. The other options are incorrect because: A) R-134a is not a sub-cooled gas at ambient temperature and pressure; C) R-134a is not a corrosive liquid, but rather a non-corrosive gas; and D) R-134a is not a superheated liquid, as it exists in a gaseous state under the given conditions.