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
A household refrigerator may have more than one evaporator coil.
Answer the following statement true (T) or false (F)
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.