The defrost cycle is normally terminated:
A) Based strictly on defrost time to reduce the chance of sensor inaccuracy.
B) Based on either temperature, pressure, or time.
C) Based strictly on pressure to insure safe operation for the compressor.
D) Based strictly on temperature to insure that all the frost has melted.
B
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Which of these is not an important consideration in refrigerant piping design?
A) Friction losses, which reduce compressor capacity. B) Height of compressor with respect to cooling coils. C) Velocity to move oil in the suction line. D) Thermal expansion of the hot gas line.
El tiempo de espera para el funcionamiento de los sistemas de alarma con energía secundaria se define en:
a. NFPA 1. b. NFPA 70®. c. NFPA 72®. d. NFPA 101®.
____ problems include broken leaves, spring sag, differences in ride height from side to side, squeaks, worn bushings, and broken center bolts.
A. Ignition switch B. Leaf spring C. Strut assembly D. Coil spring
Two straight lines can intersect at only one point.
Answer the following statement true (T) or false (F)