When is it obligatory to install a spark protector on a tractor?
- When the tractor has an upper exhaust pipe.
- When the engine’s mechanical condition is relatively poor.
- When the tractor has an open exhaust pipe.
- Correct answer: When the tractor has a lower exhaust pipe.
Why this is the answer
The correct answer in the official bank: When the tractor has a lower exhaust pipe.
A lower exhaust pipe releases hot gases and sparks close to the ground, where straw, dry grass and field crops can easily catch fire. That is why a tractor with a lower exhaust pipe must be fitted with a spark protector to prevent fires. An upper exhaust releases sparks high up, away from vegetation. The requirement depends on where the exhaust is, not on the engine's mechanical condition.