NC CDL COMBINATION VEHICLES EXAM
STUDY GUIDE 2026 QUESTIONS AND
ANSWERS GUARANTEED TO PASS
◉ How to prevent trailer skid. Answer: 1. Recognize trailer skid
early with mirrors
2. Stop braking
3. If must enter another lane to turn, turn wide as you complete the
turn.
◉ When backing, how to correct trailer drift?. Answer: Turn the
steering wheel in the direction of the drift
◉ When do you use trailer hand brake?. Answer: ONLYfor tersting
trailer brakes
◉ Should trailer hand brake be used for parking?. Answer: No B/c
trailer brakes are airbrakes--air leaks out and will eventually lead to
unlocking of brakes
◉ Glad Hands. Answer: Hose couplers that connect service and
emergency air lines
, ◉ What effect do ABS have on overall braking capability. Answer:
ABS is addition to normal brakes and do not increase or decrease
braking capability
◉ Once trailer coupled with tractor.... Answer: *raise landing gear,
starting in LOW gear range, and switching to HIGHgear range once
free of weight
*Secure crank handle safely
◉ When coupling tractor and trailer, how much space between 5th
wheels?. Answer: NOspace b/t lower and upper 5th wheels
◉ When backing tractor under trailer, which gear should be used?.
Answer: Lowest reverse gear
◉ Why back tractor directtly to trailer rather than at angle?. Answer:
Might buckle landing gear and damage/collapse trailer ground
supports.
◉ Max lengths. Answer: Single vehicle or trailer in combo is 53'
Doubles: 61' trailer combined length
Buses: 40ft
◉ Max trailer width. Answer: 102"
STUDY GUIDE 2026 QUESTIONS AND
ANSWERS GUARANTEED TO PASS
◉ How to prevent trailer skid. Answer: 1. Recognize trailer skid
early with mirrors
2. Stop braking
3. If must enter another lane to turn, turn wide as you complete the
turn.
◉ When backing, how to correct trailer drift?. Answer: Turn the
steering wheel in the direction of the drift
◉ When do you use trailer hand brake?. Answer: ONLYfor tersting
trailer brakes
◉ Should trailer hand brake be used for parking?. Answer: No B/c
trailer brakes are airbrakes--air leaks out and will eventually lead to
unlocking of brakes
◉ Glad Hands. Answer: Hose couplers that connect service and
emergency air lines
, ◉ What effect do ABS have on overall braking capability. Answer:
ABS is addition to normal brakes and do not increase or decrease
braking capability
◉ Once trailer coupled with tractor.... Answer: *raise landing gear,
starting in LOW gear range, and switching to HIGHgear range once
free of weight
*Secure crank handle safely
◉ When coupling tractor and trailer, how much space between 5th
wheels?. Answer: NOspace b/t lower and upper 5th wheels
◉ When backing tractor under trailer, which gear should be used?.
Answer: Lowest reverse gear
◉ Why back tractor directtly to trailer rather than at angle?. Answer:
Might buckle landing gear and damage/collapse trailer ground
supports.
◉ Max lengths. Answer: Single vehicle or trailer in combo is 53'
Doubles: 61' trailer combined length
Buses: 40ft
◉ Max trailer width. Answer: 102"
