In which of the following situations should you not start the engine in an agricultural tractor?
Show the correct answer
Correct answer
B. If the level of oil in the engine is below the minimum level mark on the dipstick.
Explanation
In the photo you can see a key inserted in the ignition on the dashboard of a tractor. You do not start the engine if the oil level is below the minimum mark on the dipstick - answer B.
Oil lubricates the bearings, the crankshaft and the pistons, and when the level is too low, the pump may suck in air and the oil pressure drops. Running with insufficient lubrication quickly damages the engine, and an engine seizure while driving can make the tractor stop suddenly on the road. That is why you first top up the oil to a level between the MIN and MAX marks, and only then do you turn the key. The Road Traffic Act requires a vehicle to be maintained in a condition that does not endanger safety. Heavy rain (answer A) does not prevent you from starting the engine. A fuel tank that is not full (answer C) is not an obstacle either - it is enough to have sufficient fuel for the planned journey, and in a diesel engine you only need to avoid emptying the tank completely and getting air into the fuel system.
Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)