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Combination Vehicles #1
Practice Test
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Combination Vehicles #1
Question 17 of 20
85% complete
Question 17
lf you are not pulling a trailer, why should you lock the tractor glad hands together (or use dummy couplers)?
A
It helps balance the air pressure between the tractor and trailer.
B
To make it easier to attach to a trailer later.
C
It will keep dirt or water out of the lines.
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