Question

the level of oil in an engine is normally checked by _____.
○ checking the oil on the dipstick
○ opening an inspection port
○ checking the oil temperature
○ looking at a sight glass

Explanation:

The standard, most common method for checking engine oil levels in typical internal combustion engines (like in cars, small engines) is using a dipstick, which is designed specifically for this purpose. Other methods like sight glasses or inspection ports are less universal, and oil temperature does not indicate oil level.

Answer:

checking the oil on the dipstick