In a typical FMVSS 121 compliant tractor-trailer,when you actuate the trailer hand control valve which circuit supplies air to the trailer service brakes when the system is functioning normally?
A) primary circuit
B) secondary circuit
C) supply circuit
D) park/emergency circuit
Correct Answer:
Verified
Q3: If you have to make an adjustment
Q4: Which of the following pressure values are
Q5: In a truck air brake system,which sub-circuit
Q6: When the emergency/parking brakes are released on
Q7: When a truck has no air pressure
Q9: Which types of foundation brakes are used
Q10: When a FMVSS-121 compliant tractor-trailer is running
Q11: If a truck is FMVSS 121 compliant,which
Q12: Which of the following are function(s)of slack
Q13: In what year was FMVSS 121 introduced?
A)
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