It completely depends on your state laws. In California it would not be, but in Utah it would.
I believe you are "standing", not parked.
If your car is running when parked then it is burning gas. Cars use gasoline to run the engine.
Verbs are only simple when in a sentence, with one verb.I parked the car outside the cinema.This is a past simple sentence. It has one verb in the past tense - parked
Verbs are only simple when in a sentence, with one verb.I parked the car outside the cinema.This is a past simple sentence. It has one verb in the past tense - parked
Usually when parked at a speed trap or when stationary.
Because your car is running and they dont want someone to hop in your car and steal it
Diesels are kept running while parked for various reasons. In cold weather, a diesel may be very difficult to start so it is better to leave it running. Maybe the engine is needed to run heat or A/C for the sleeper cab.
New plugs and flush fuel system, includes draining tank and fill with fresh fuel.
water coming from the exhaust is normal not lots but some
The person who is backing out
Exhaust fumes may enter and that is not good.
yes