NY CDL Combination study plan

Sequence the full coupling procedure from memory, naming the order of the five wheel-chock, air-line, and electrical-cable steps before touching the tractor

Label a hand-drawn diagram of the fifth-wheel, kingpin, locking jaws, and release handle, then explain how the jaws close around the kingpin

List the three visual checks that confirm a trailer is properly coupled after a tug test, and state what each check rules out

Recite the pre-trip inspection items unique to a combination vehicle that do not appear on a single-unit pre-trip

Perform the uncoupling sequence in order, stating where chocks go, when the landing gear is lowered, and when the air lines are disconnected

Explain why the trailer supply valve (red) is closed before disconnecting lines and what happens if it is not

Describe how to check that the landing gear is low enough and the tractor is fully under the trailer before coupling, including the gap-and-height check

Diagnose four coupling failures (high trailer, low trailer, missed kingpin, unlatched jaws) and state the symptom and the correction for each

Define off-tracking and calculate, for a 53-foot trailer, roughly how far the rear wheels cut inside the tractor's path in a 90-degree turn

Explain how wheelbase and trailer length change the swept path, and describe how to set up a right turn so the trailer clears the curb

Describe the pivot point in a turn and how it shifts as the tractor-trailer articulates, including what happens to the rear of the trailer during a lane change

Identify the mirror checks and shoulder checks that reveal the trailer's position during a turn, and state when to stop and re-check

Trace the path of compressed air from the compressor through the supply tanks, foot valve, and relay valve to the trailer brakes, naming each component in order

Explain the difference between the service brake system and the parking/emergency system, and state what the red and blue trailer lines supply

Describe a tractor protection valve failure and the conditions that cause a trailer breakaway to set the trailer spring brakes

State the correct order for a static leak test: build pressure, shut off the engine, and note the acceptable pressure-loss limits for a combination vehicle

Execute the three-part air brake check in order (applied leak test, tractor protection valve check, low-pressure warning) and state the pass criteria for each

Explain how brake fade and out-of-adjustment slack adjusters change stopping distance on a downgrade, and describe the correct braking technique for a long descent

Describe how to use engine braking and a controlled descent speed rather than riding the brakes, and state why a combination vehicle needs more stopping distance than a single unit

Identify the conditions that trigger a brake adjustment check and describe how to measure pushrod travel

Explain how center of gravity and the trailer's high load height make a combination vehicle prone to rollover, and identify the speed at which a posted curve becomes unsafe

Describe the correct technique for entering and holding a curve, including when to slow down and when to accelerate through the exit

List the factors that increase rollover risk (load shift, crosswinds, off-camber curves, sudden steering) and the corrective action for each

State following-distance rules for a combination vehicle and explain why the standard four-second gap is a minimum, not a target

Define a jackknife and distinguish a drive-axle jackknife from a trailer jackknife, stating the cause and the recovery input for each

Explain why locking the drive axles or over-braking causes a jackknife, and describe how to recover by releasing the brakes and steering into the skid

Describe the correct response to a front-wheel skid, a rear-wheel skid, and a trailer swing, and state what not to do in each

List the emergency steps for a blowout, a brake failure, and a trailer breakaway, in order

Re-run the full pre-trip, coupling, and uncoupling sequence under time pressure and score it against the manual

Complete a mixed 60-question practice set spanning all five domains and log every missed item by domain

Re-study only the two weakest domains identified by the practice set and re-test those items

Rehearse the verbal explanation of off-tracking, brake tests, and skid recovery aloud as if answering an examiner