Which type of refrigerant has the highest Ozone Depletion Potential (ODP)?
A. HFC
B. HCFC
C. CFC
D. All have the same ODP.
Answer: C
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Which of the following has the advantage of being resistant to shock and vibration and is commonly used for the I/O track of a programmable controller?
a. Solid-state relay b. Mechanically held relay c. Bimetallic overload relay d. Thermal overload relay
When judging swine, the underline is only considered on gilts.
Answer the following statement true (T) or false (F)
The purpose of controls in an HVACR system is to:
A) Protect the refrigeration cycle components. B) maintain the temperature in a space. C) Start and stop all the electrical components. D) Regulate HVACR equipment in response to monitored conditions.
The refrigerant line whose sizing has the most effect on the compressor's compression ratio is the:
A) Suction line. B) Liquid line. C) Discharge line. D) Refrigerant line sizing has no effect on compression ratio.