Hvac metering devices - Study guides, Class notes & Summaries

HVAC (EPA Certification Exam Section 608) Questions and Answers 2023 How many types of HVAC certifications are there? There are 4 types. What does a metering device do? The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? Heat is absorbed in the evaporator. What happens in the evaporator? Heat is absorbed in the evaporator and causes the refrigerant to boil from liquid to vapor. ...

a (Centrifugal) - ANSWER-Which of the following compressors are considered a dynamic compressor? a. Centrifugal b. Reciprocating d. Rotary c. Scroll b (Superheated vapor / sub cooled liquid) - ANSWER-What is the condition of the refrigerant as it enters and leaves the condensing coil of a typical light commercial HVAC system? a. Vapor / liquid b. Superheated vapor / sub cooled liquid c. Saturated vapor / saturated liquid d. Hot gas / cool liquid b (Thermal expansion valve) - AN...

What is typically used on small appliances as a service aperture or other device for adding or removing refrigerant? a. A straight piece of tubing that is entered using a piercing access tube. b. A line located 15 inches below the compressor. c. A valve installed at the factory which has a ¼ inch diameter and machine threads. d. A service aperture is not present because small appliances are exempt from this requirement. - ANSWER A What type of appliances are technicians certified to serv...