Technician A says that before performing proprietary reprogramming of an engine ECM, any fault codes should be cleared. Technician A says that in most cases following a proprietary data reprogramming procedure, a verification file has to be uploaded to the OEM data hub. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B.
D. Neither A nor B
Answer: C
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Which of the following are symptoms of a fault in the EGR system?
A) Rough idle and stalling B) Excessive NOx emissions C) Detonation during acceleration or cruise D) All of these
________ represents the amount of water vapor in the air compared to the amount of water vapor the air can hold
A) Specific humidity B) Wet bulb temperature C) Relative humidity D) Density
What component cools turbocharger boost air?
A. Charge air cooler (CAC) B. Turbocharger impeller. C. Diesel particulate filter (DPF) D. Wet air filter.
Variable frequency drives intended to control motors under 500 horsepower generally use SCRs or GTOs.
Answer the following statement true (T) or false (F)