Final answer:
The statement is false; the crankshaft in a four-stroke cycle engine only makes two complete rotations to complete the cycle, as each piston stroke results in half of a crankshaft rotation.
Step-by-step explanation:
The statement is false. In a four-stroke cycle engine, the crankshaft only needs to make two complete rotations to complete the cycle. This is because each stroke of the piston equates to half a rotation of the crankshaft, and since there are four strokes (intake, compression, power, exhaust), this results in a total of two rotations. The four-stroke internal combustion engine operates on the Otto cycle, which involves the following stages: (a) intake stroke where air is mixed with fuel, (b) compression stroke where the mixture is compressed, doing work on the gas, (c) power stroke where fuel ignition converts chemical potential energy into thermal energy and the gas does work by exerting force, and (d) exhaust stroke where waste gas is expelled.