The most common type of demand defrost control:
A) Measures the temperature difference between the coil temperature and the ambient temperature.
B) Senses the suction pressure.
C) Senses the compressor current draw.
D) Operates strictly on time.
A
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Technician A says that a dedicated Paccar serial communications adapter (CA) known as a vehicle communications interface (VCI) is required to connect to Paccar MX Series engines built between 2010 and 2013. . Technician B says that a generic RP1210 CA can be used to connect to post-2013 versions of MX-engines. Who is right?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Clear water is observed dripping out from beneath the vehicle. Technician A says that is normal. Technician B says that the evaporator housing is defective and should be replaced. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
A drive shaft can be checked for proper balance by marking the circumference of the shaft in four places and running the vehicle drive wheels to spot the point of imbalance using a(n) ________
A) Scan tool B) Electronic vibration analyzer (EVA) C) Reed tachometer D) Strobe light