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Sagot :
A good source of insight to the technician about an engine's condition is the noises coming from the engine
The correct option that gives the exception to the noises heard during a cranking sound diagnosis is the option;
- b. The engine revving and starting up
Reason:
During a cranking sound diagnosis, the engine need to be disabled to
prevent it from starting, which is done by removing the relay for the fuel
pump, which will prevent fuel from potentially hydro-locking the engine
The key is then used to crank the engine, during which the cranking sound
is listened to
The sources of the noises produced includes;
- The starter is misaligned
- The clunk of a spun crankshaft bearing noise
- The sound given by a low compression cylinder, which is an uneven sound
- The no compression condition fast cranking sound, due to broken time belt that results in bent valves
Therefore;
The exception to the sounds heard during a cranking sound diagnosis is; The engine revving and starting up
Learn more here:
https://brainly.com/question/18457057
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