Describe the noise caused by an excessively worn crankshaft main bearing.
What will be an ideal response?
Worn crankshaft main bearings cause a heavy thumping knock for a brief time when the engine is first started after it has been shut off for several hours.
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Hydraulic lines must be _____ so that energy will be transmitted effectively throughout the system
a. thin b. rigid c. flexible d. the proper size
You supply air to the trailer tanks by:
a. Connecting the service line glad hand. b. Pulling out the trailer air supply valve. c. Pushing in the trailer air supply valve.
The SCR can control all of the positive waveform through the use of ____ shifting.
A. diode B. phase C. rectifier D. gate
What happens if the DEF runs low during vehicle operation?
A. The engine is immediately shut down. B. The vehicle enters progressive trim back modes. C. Nothing. D. A code is logged in the PCM to notify technicians the next time vehicle is serviced.