Question

The main difference between the internal combustion engine and the diesel engine is that the diesel engine
A. does not have a crankshaft.
B. has no connecting rods.
C. does not utilize pistons.
*D. has no ignition system.

Answer 1

hint: the diesel engine creates the "spark" by compressing the air fuel mixture so that it reaches a very high temperature

Answer 2

diesel engines don't need a spark plug for ignition.