What is the function of the tractor’s differential lock?
- Correct answer: To assist when one of the tractor’s wheels sinks or skids.
- To assist in maintaining driving direction while driving on a straight road.
- To prevent the tractor from slipping in sharp turns.
- To assist during emergency braking.
Why this is the answer
The correct answer in the official bank: To assist when one of the tractor’s wheels sinks or skids.
A differential lets the wheels turn at different speeds, so when one wheel sinks or skids, the power goes to that wheel and it just spins. The differential lock makes both wheels turn together, so the wheel with grip can pull the tractor free. It should not be used in turns, because it resists turning and can cause loss of control.