Michigan CDL Combination study plan

Build a written pre-trip inspection checklist for a tractor-trailer that covers the engine compartment, coupling system, trailer frame, and brake components in the order you would actually walk them

Recite the seven-step air brake check from memory, including static leak, applied leak, tractor protection valve, and trailer emergency-line pop-out tests, with the pass/fail pressure and time limits written next to each step

Identify every air line, gladhand, and electrical connection on a combination vehicle and state what each one controls and what failure looks like if it disconnects

Explain why a trailer supply-line rupture triggers emergency spring brakes and describe how that differs from a slow service-side leak

Log the psi drop per minute you measured on a practice or simulator air system and compare it against the legal limit

Trace the full air path from compressor through governor, reservoirs, foot valve, relay valve, and spring brake chambers, sketching it on paper without notes

Diagnose five written fault scenarios (low pressure warning, compressor not building, trailer brakes dragging, slack adjuster out of adjustment, rapid loss while braking) and state the correct response for each

Practice controlled stops from 20 mph using light steady pedal pressure and describe how stopping distance and pedal feel change when the trailer is loaded versus empty

Demonstrate the tug test, fifth-wheel jaw check, and trailer brake test sequence in the correct order and explain what each one proves

Explain the low-air warning threshold and the pressure at which the tractor protection valve should close

Perform the full coupling sequence from memory in order, from inspecting the fifth wheel and trailer height through the tug test and final walk-around

Perform the full uncoupling sequence from memory, including landing gear contact, air line disconnection order, and pulling clear of the trailer

List the specific causes of a high hook or low hook and describe the inspection you would do before attempting to couple again

Practice straight-line backing and gentle acceleration and braking in a large lot, keeping the combination tracking straight with no jackknife tendency

Explain how to verify the fifth-wheel release handle is in the locked position and why a visual check alone is not enough

Explain off-tracking and calculate roughly how far the rear trailer wheels cut inside the front tractor wheels during a 90-degree turn

Describe the correct setup and steering inputs for a right turn that keeps the trailer clear of the curb without swinging wide into the next lane

Describe the correct setup for a left turn and identify the two most common errors that cause a trailer to clip a vehicle or sign on the inside

Practice a 90-degree alley-dock or offset backing maneuver and narrate the mirror-to-mirror correction sequence you use when the trailer drifts

Identify the pivot points on a combination vehicle and explain how they change your backing corrections compared with a single unit

Explain what causes a tractor-trailer to jackknife, including drive-axle lockup, and list the driver actions that prevent it

Describe the correct recovery procedure for a rear-wheel skid and contrast it with the counterintuitive steering required for a front-wheel skid

Explain why braking hard on a curve or slick surface is more dangerous in a combination vehicle and state the correct speed and braking approach before entering a curve

Practice or simulate threshold braking on a wet or low-friction surface and describe how trailer push affects your steering corrections

List the conditions that most often lead to trailer swing and explain how to correct it once it starts

Explain how to distribute cargo weight to keep the steer axle, drive axles, and trailer axles within their ratings and describe what happens to steering and braking if the trailer is overloaded at the rear

Describe how to check axle and gross weight limits and where to find the ratings for a specific tractor and trailer

List the required cargo securement devices and the working load limit rule for aggregate tiedowns

Explain how load shift, high center of gravity, and an unbalanced load affect rollover risk in a combination vehicle

Re-run the full pre-trip inspection with cargo loaded and identify the additional checks that only apply to a loaded trailer

Scan and describe the hazards in ten written road scenarios, naming the specific hazard, the space cushion you would keep, and the action you would take

Explain safe following distance for a loaded combination vehicle at highway speed and how to adjust it for rain, night, and heavy traffic

Describe how to manage a downgrade, including gear selection before the descent and brake use that avoids overheating

Identify the hazards created by other drivers around a large combination vehicle, including blind spots, cut-ins, and passing on the right

Explain how fatigue, hours-of-service limits, and pre-trip planning affect hazard perception and reaction time

Re-run the full pre-trip inspection and air brake test under time pressure with no missed items

Re-perform the coupling and uncoupling sequences from memory and self-score each step

Complete a full-length practice test across all eight domains and review every missed question to its source rule

Build a personal error list of the ten items you missed most often across the plan and write the correct answer for each

Confirm test-day logistics, including appointment, required documents, and vehicle condition requirements