1. The chemical components of HCFC refrigerants are

• 1. Hydrogen, Chlorine, Freon, and Carbon

• 1. Hydrogen, Chlorine, Fluorine, and Carbon

• 1. Helium, Chlorine, Freon, and Carbon

• 1. Helium, Chlorine, Fluorine, and Carbon

1. What is the primary environmental concern associated with HCFC refrigerants?

• 1. Water pollution

• 1. Global warming

• 1. Soil contamination

• 1. Ozone depletion

1. The refrigerant in a mechanical compression refrigeration system absorbs and releases heat by

• 1. Changing its temperature

• 1. Changing its molecular composition

• 1. Changing its physical state

• 1. Converting heat to work

1. Which of the following devices can respond to changes in refrigeration conditions?

• Throttle Valve

• 1. Orifice

• 2. Capillary tube

• 1. Thermostatic expansion valve

1. The three basic types of condensers used with HVAC/R systems are

• 1. Air cooled, water cooled, and evaporative

• 1. External, internal, and cross-charged

• 1. Condensing, non-condensing, and static

• 1. Standard, metric, and transitional

1. The purpose of the condenser in a refrigeration system is to 

• 1. Absorb heat into the refrigerant

• 1. Reject heat from the refrigerant

• 1. Condense water vapor in the atmosphere

• 2. Reject heat from the condensing medium

1. Which of the following is a common method for leak detection in refrigeration systems?

• 1. Ultrasonic testing

• 1. Visual inspection

• 1. Pressure testing

• 1. All of the above

1. Besides improving efficiency, insulating the suction line:

• 1. Prevents moisture from condensing on the line

• 1. Prevents stray electrical current from traveling down the pipe

• 1. Serves as a backup sealing system to prevent refrigerant loss

• 1. Reduces mechanical vibrations set up by the compressor

The component of an Air Conditioning system that absorbs heat from indoor air is

• Condenser

• Throttle Valve

• Evaporator

• 1. Compressor

1. Tube in tube, shell and coil, and shell and tube are all different types of 

• 1. Evaporative condensers

• 1. Natural draft condensers

• 1. Water cooled condensers

• 1. Air cooled condensers