Question

Auto Technician A says during the power stage of engine operation, the piston is forced downward in the cylinder due to the compression of the burning air-and-fuel mixture. Auto Technician B says the power stage of engine operation is directly followed by the intake stage. Which one of the following statements is correct?
A. Both Technician A and Technician B are correct.
B. Neither Technician A nor Technician B is correct.
C. Only Technician B is correct.
D. Only Technician A is correct.

Answer 1

C. Only Technician B is correct.

Answer 2

Answer:

• Option-(B): Neither Technician A nor Technician B is correct, As the whole process does not follow the Otto cycle.

Explanation:

Engine Operation:

The engine operation occurs in four main stages, as its function of any four-stroke engine requires the crankshaft to rotate twice in the machine covering about 720° degree of rotation while on its position.

While, the four main stages for the engine to operate are as follow:

1. Intake:The fuel is injected inside the piston.
2. Compression:As during the compression the volume is decreased and as more energy is released due to this phase of the engine.
3. Power: During the power stage the expansion of the gases which are compressed before are expanded, providing a power stroke to the engine.
4. Exhaust: The phase during the engine cycle in which the air is exhausted out from the combustion chamber of the engine.