When are you required to check engine oil level?
- After starting-up the engine in the morning.
- Correct answer: Before starting-up the engine and on a straight surface.
- At the end of a drive and on a straight surface.
- After starting-up the engine and on a straight surface.
Why this is the answer
The correct answer in the official bank: Before starting-up the engine and on a straight surface.
Before the engine is started, most of the oil has returned to the oil pan at the bottom of the engine, so the dipstick shows the true level. While the engine is running, or right at the end of a drive, some of the oil is still in the upper parts of the engine, and the reading is lower than the real level. Stand on a straight, horizontal surface, because when the vehicle is tilted the oil flows to one side and the measurement is distorted.