Question

which of the following engine configurations will result in the slowest piston speeds at the top and bottom of each piston stroke?
short - stroke engine
short throw
long - stroke engine
large cylinder bore
11 multiple choice 1 point
what type of ignition system does a diesel engine use to ignite fuel?
spark
compression
high pressure
electronic
12 multiple choice 1 point
which tires tend to lift during torque reaction on a heavily loaded truck with a high torque diesel engine?
right front and right rear
left front and right rear
left rear and right front
left front and left rear

Explanation:

• For the first question, a long - stroke engine has a longer distance for the piston to travel, resulting in slower speeds at top and bottom dead centers compared to short - stroke engines. Short throw is not a standard term in this context and large cylinder bore doesn't directly relate to piston speed at stroke ends.
• For the second question, diesel engines use compression to ignite fuel. Air is compressed in the cylinder, raising its temperature and pressure, which then ignites the injected fuel. Spark ignition is used in gasoline engines. High pressure is a result of compression and not a separate ignition system type. Electronic is a general control aspect and not an ignition method.
• For the third question, due to torque reaction in a heavily loaded truck with a high - torque diesel engine, the left front and left rear tires tend to lift as the engine's torque tries to rotate the vehicle in the opposite direction of the drive torque.

Answer:

1. C. Long - stroke engine
2. B. Compression
3. D. Left front and left rear