Which compressor chiller uses a pair of rotors to compress the refrigerant gas?
A) screw compressor chillers B) centrifugal compressor chillers
C) reciprocating compressor chillers D) scroll compressor chillers
A
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____ may be caused by earthquakes, floods, storm winds, tornadoes, or mud flows.
A. Slow onset disasters B. Communication disasters C. Rapid onset disasters D. Data disasters
How is the AC compressor lubricated in an R-134a system?
A) Most compressors are a sealed unit with their own oil B) The refrigerant oil mixes with the refrigerant C) The oil moves through the system simply with the movement of the refrigerant D) Uses a sump to hold 3 to 5 oz. of refrigerant oil
To ensure that the width of joints between ceramic or natural stone tiles are uniform, the installer uses
A) steel ruler. B) chalk lines. C) 2 × 4 wood straight edge. D) plastic spacers. E) a laser beam.
A household refrigerator may have more than one evaporator coil.
Answer the following statement true (T) or false (F)