To avoid system breakdown due to the failure of components that have a predictable service life, it is wise to:
A) Always use pulleys that have two belts.
B) Not purchase any equipment that has parts that can wear out.
C) Schedule parts replacements for wear items near the end of their service life.
D) Install another backup system that can be quickly brought online.
C
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A battery high rate discharge (load capacity) test is being performed on a 12 volt battery. Technician A says that a good battery should have a voltage reading of higher than 9.6 volts while under load at the end of the 15-second test. Technician B says that the battery should be discharged (loaded) to twice its CCA rating. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Why is it necessary to purge gauge manifold valves while they are connected?
A) To prevent contamination of the system B) To prevent valve damage C) To stop refrigerant loss D) To preserve the system's charge
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