When you are about to couple a tractor 5th wheel to a trailer upper coupler, which of the following must be true?
A. trailer bolster plate should be about 1-inch higher than 5th wheel plate
B. trailer bolster plate should be fractionally lower than 5th wheel plate
C. 5th wheel jaws should in their closed position
D. 5th wheel secondary lock should be in latched closed position
Answer: B
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A) HOAT B) OAT C) PHOAT D) IAT
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The refrigerant trapped in the cylinder when the piston reaches the top of its stroke is called ____________________.
Fill in the blank(s) with the appropriate word(s).