Technician A places his finger over the breather hole when greasing a propeller shaft slip spline.Technician B says that to properly grease 5th wheel pivot pins when a tractor is coupled to a trailer,the weight on the 5th wheel should be relieved by cranking up the dolly legs.Who is correct?

A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Propeller Shaft Slip Spline

A design feature in a propeller or drive shaft that allows it to adjust length or compress and extend to accommodate movement or vibration.

5th Wheel Pivot Pins

5th Wheel Pivot Pins are critical components in the coupling mechanism of a tractor-trailer, allowing the fifth wheel plate to pivot as the trailer moves, ensuring smooth turning and maneuverability.