41. There are two things that a driver can do to prevent a rollover. They are (1) keep the cargo as close to the ground as possible; and (2):
Go slow around turns.
42. To stop a trailer skid you should:
Release the service brakes.
43. If you cannot make a turn without entering another traffic lane:
You should turn wide as you complete the turn.
44. The air lines on a combination vehicles are often colored to prevent then from mixing up. The emergency line is ____, the service line is ____.
Red, blue
45. The semi-trailer made before 1975 that are equipped with the air brakes:
Often do not have spring brakes.