Before a trip, you should make a visual check of a coupling to ensure that:

Question

When performing a visual check of coupling devices, you should make sure there is no space between the upper and lower fifth wheel. Ensure that the locking jaws are securely closed around the kingpin.

Accepted Answer

There is no space between the upper and lower fifth wheel.

Answer

There is no mud on the fifth wheel.

Answer

The convertor gear is polished.