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Bobtailing And Jackknifing – SS13022AE (8 min.)

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1
Bobtailing is dangerous because of the profile of the tractor.
2
It is okay to bobtail with marginal safety defects on the tractor unit.
3
You should only travel in good weather. Pull off and wait out the inclement weather.
4
Jackknifing occurs when the driver locks up the drive axle brakes on the tractor.
5
If you lock up the steering axle brakes, the rig will move backward regardless of the wheel angle.
6
There are many reasons for bobtailing a tractor, such as _____________.
7
You should only bobtail when ________________.
8
Jackknifing will occur if you ________________.
9
If you can keep the axles from locking up, even ______ % short of locked up, you can preserve directional stability
10
Steering axle brakes provides _______ % of the total braking capability of a loaded vehicle.