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200+ Free NJ CDL Combination Practice Questions

Pass your New Jersey CDL Combination Vehicles Test exam on the first try — instant access, no signup required.

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Combination vehicles are more likely than straight trucks to roll over because:

A
B
C
D
to track
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2026 Statistics

Key Facts: NJ CDL Combination Exam

80%

minimum passing score for CDL knowledge tests

NJ MVC CDL Tests and 49 CFR 383.135

$125

NJ MVC CDL test fee

NJ MVC CDL Tests

7 days

knowledge retake wait after failure

NJ MVC CDL Tests and CDL FAQ

360 days

CDL test-score validity

NJ MVC CDL Tests and CDL FAQ

14 days

validated CLP practice period before skills test unless waived

NJ MVC CDL Tests

20-45 psi

range where trailer air supply valve may pop out

NJ MVC CDL Manual Section 6.2.3

New Jersey Class A/Group A CDL applicants should study NJ CDL Manual Section 6 and pass the required CDL knowledge tests with at least 80% correct. MVC lists a $125 CDL test fee, a seven-day wait after failed knowledge tests, 360-day test-score validity, and a 14-day validated-CLP practice period before skills testing unless waived. For combination vehicles, know fifth wheel and kingpin coupling, trailer height, tug and visual checks, air and electrical lines, landing gear, trailer brakes, off-tracking, rollover, backing, trailer skids, jackknife recovery, railroad crossings, and speed and space management.

Sample NJ CDL Combination Practice Questions

Try these sample questions to test your NJ CDL Combination exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 200+ question experience with AI tutoring.

1Which applicant generally needs New Jersey CDL Combination Vehicles knowledge?
A.A qualifying Class A tractor-trailer applicant
B.Use only the trailer hand valve
C.Ignore it if the tractor feels normal
D.Raise the landing gear halfway
Explanation: Group A/Class A applicants need combination-vehicle knowledge for qualifying tractor-trailer or truck-trailer operation. This is why a qualifying class a tractor-trailer applicant is the best answer.
2What score is required to pass CDL knowledge tests such as Combination Vehicles?
A.Ignore it if the tractor feels normal
B.Raise the landing gear halfway
C.Rely on ABS to fix the issue
D.80%
Explanation: NJ MVC and 49 CFR 383.135 use an 80 percent passing standard for CDL knowledge tests. This is why 80% is the best answer.
3Which NJ CDL manual section is the main source for Combination Vehicles knowledge?
A.Rely on ABS to fix the issue
B.Drive faster to straighten the trailer
C.Section 6
D.Raise the landing gear halfway
Explanation: NJ CDL Manual Section 6 covers driving combinations, air brakes, ABS, coupling/uncoupling, and inspecting combinations. This is why section 6 is the best answer.
4What is a combination vehicle?
A.Disconnect the electrical cord
B.A truck or tractor pulling one or more trailers
C.Rely on ABS to fix the issue
D.Drive faster to straighten the trailer
Explanation: A combination vehicle is a truck or tractor pulling one or more trailers. This is why a truck or tractor pulling one or more trailers is the best answer.
5Which cargo habit best helps prevent combination-vehicle rollover?
A.Keep cargo low and centered
B.Drive faster to straighten the trailer
C.Disconnect the electrical cord
D.Assume the fifth wheel is locked
Explanation: Keeping cargo low and centered reduces rollover risk in combination vehicles. This is why keep cargo low and centered is the best answer.
6What does rearward amplification describe?
A.Disconnect the electrical cord
B.Assume the fifth wheel is locked
C.Use the parking brake while moving
D.Trailer reaction amplified by quick steering
Explanation: Rearward amplification is the crack-the-whip effect in which quick steering is magnified toward the trailer. This is why trailer reaction amplified by quick steering is the best answer.
7What following-distance rule applies to combination vehicles?
A.Use the parking brake while moving
B.Use only the trailer hand valve
C.1 second per 10 feet, plus 1 over 40 mph
D.Assume the fifth wheel is locked
Explanation: The manual gives at least 1 second per 10 feet of vehicle length, plus 1 second over 40 mph. This is why 1 second per 10 feet, plus 1 over 40 mph is the best answer.
8What should you do if stuck on railroad tracks?
A.Ignore it if the tractor feels normal
B.Get away and call 911 or the posted number
C.Use the parking brake while moving
D.Use only the trailer hand valve
Explanation: Low-slung trailers can hang up on raised railroad crossings; if stuck, get away and call emergency help. This is why get away and call 911 or the posted number is the best answer.
9What is off-tracking?
A.Rear wheels track inside the front wheels
B.Use only the trailer hand valve
C.Ignore it if the tractor feels normal
D.Raise the landing gear halfway
Explanation: Off-tracking means rear wheels follow an inside path compared with front wheels during turns. This is why rear wheels track inside the front wheels is the best answer.
10How should you manage a tight right turn?
A.Ignore it if the tractor feels normal
B.Raise the landing gear halfway
C.Rely on ABS to fix the issue
D.Turn wide while preventing right-side passing
Explanation: Turn wide as you complete the turn and keep the rear close enough to discourage right-side passing. This is why turn wide while preventing right-side passing is the best answer.

About the NJ CDL Combination Exam

The New Jersey CDL Combination Vehicles Test is the knowledge test for drivers seeking Class A/Group A privileges to operate qualifying tractor-trailer and truck-trailer combinations. New Jersey MVC administers CDL knowledge testing through its Examination Test Receipt and CLP process, while FMCSA Part 383 sets federal CDL testing standards including the 80% passing score and the rule that a failed combination-vehicle portion blocks Group A issuance. The tested knowledge is drawn from New Jersey CDL Manual Section 6: driving combinations safely, rollover prevention, rearward amplification, off-tracking, safe turns, railroad crossings, trailer skids, backing, trailer hand valve use, tractor protection valve, trailer air supply, service and emergency lines, glad hands, ABS, coupling and uncoupling, fifth wheel and kingpin checks, landing gear, air/electrical lines, and combination brake inspection.

Assessment

State-administered multiple-choice CDL knowledge test for New Jersey Class A/Group A combination applicants. MVC publishes a 50-question General Knowledge test with additional separate tests for required vehicle groups and endorsements; Combination Vehicles knowledge is tested separately for qualifying Class A combination operation.

Time Limit

Computer-terminal MVC CDL knowledge testing; no separate public time limit found in official New Jersey MVC sources for the Combination Vehicles test

Passing Score

80% minimum on CDL knowledge tests; under 49 CFR 383.135, failing the combination-vehicle portion prevents Group A CLP/CDL issuance

Exam Fee

$125 CDL test fee (New Jersey Motor Vehicle Commission (MVC))

NJ CDL Combination Exam Content Outline

Core Section 6 area

Driving Combination Vehicles Safely

Rollover risk, cargo center of gravity, rearward amplification, steer gently, brake early, railroad-highway crossings, trailer skids, off-tracking, wide turns, backing, pull-ups, and following distance.

Core Section 6 area

Combination Vehicle Air Brakes

Trailer hand valve, tractor protection valve, trailer air supply control, service and emergency lines, glad hands, crossed-line faults, trailer tanks, shut-off valves, trailer service brakes, parking brakes, and emergency brakes.

Core Section 6 area

Antilock Brake Systems

Trailer and converter dolly ABS requirements, yellow malfunction lamps, braking technique with ABS, trailer-only ABS limits, and regular-brake operation after malfunction.

Core Section 6 area

Coupling and Uncoupling

Fifth wheel plate, jaws, locking lever, safety latch, kingpin, trailer height, air/electric lines, trailer air charging, tug test, visual inspection, landing gear, chocks, and safe uncoupling sequence.

Core Section 6 area

Inspecting Combination Vehicles

Lower and upper fifth wheel, sliding fifth wheel, air/electric line support and leaks, landing gear, crank handle, turning clearances, brake air-flow checks, and trailer service-brake testing.

State and federal logistics

New Jersey CDL and FMCSA Rules

MVC Examination Test Receipt, $125 test fee, 80% passing score, seven-day knowledge retake wait, 360-day test-score validity, 14-day CLP practice period, ELDT context, and Group A federal standards.

How to Pass the NJ CDL Combination Exam

What You Need to Know

  • Passing score: 80% minimum on CDL knowledge tests; under 49 CFR 383.135, failing the combination-vehicle portion prevents Group A CLP/CDL issuance
  • Assessment: State-administered multiple-choice CDL knowledge test for New Jersey Class A/Group A combination applicants. MVC publishes a 50-question General Knowledge test with additional separate tests for required vehicle groups and endorsements; Combination Vehicles knowledge is tested separately for qualifying Class A combination operation.
  • Time limit: Computer-terminal MVC CDL knowledge testing; no separate public time limit found in official New Jersey MVC sources for the Combination Vehicles test
  • Exam fee: $125 CDL test fee

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

NJ CDL Combination Study Tips from Top Performers

1Read NJ CDL Manual Section 6 once straight through, then turn each subsection heading into a checklist: driving safely, air brakes, ABS, coupling, uncoupling, and inspection.
2Memorize the coupling sequence around failure points: trailer height, open jaws, straight alignment, air/electric line support, tug test, visual lock check, no fifth wheel gap, landing gear fully raised, and chocks removed.
3Treat red and blue air-line questions as function questions: red emergency/supply charges tanks and controls emergency brakes; blue service carries brake applications.
4Practice scenario questions by asking what keeps the wheels rolling, the trailer inline, and the center of gravity controlled.
5Before testing, confirm NJ MVC logistics: Examination Test Receipt, 6 Points of ID, $125 fee, 80% passing score, seven-day retake wait, score validity, CLP practice period, and ELDT status.

Frequently Asked Questions

Who needs the New Jersey CDL Combination Vehicles test?

Drivers seeking New Jersey Class A/Group A privileges for qualifying tractor-trailer or truck-trailer combinations generally need combination-vehicle knowledge. Federal rules also prevent Group A CLP/CDL issuance if the applicant fails the combination-vehicle portion.

What score do I need to pass?

NJ MVC publishes an 80% passing grade for CDL knowledge tests. Federal CDL rules in 49 CFR 383.135 also require at least 80% correct on each knowledge test.

How much does the New Jersey CDL testing process cost?

NJ MVC lists the CDL test fee as $125. Applicants should separately verify any license, endorsement, medical, ELDT, or provider costs that may apply.

What happens if I fail the New Jersey CDL knowledge test?

NJ MVC says failed knowledge-test applicants must wait seven days before retesting. MVC FAQ also states the Test Receipt is valid for 180 days and must be renewed if the applicant has not passed within that period.

What topics are on the New Jersey Combination Vehicles test?

Study NJ CDL Manual Section 6: driving combinations safely, rollover, off-tracking, backing, trailer skids, combination air brakes, ABS, coupling, uncoupling, fifth wheel and kingpin checks, air/electric lines, landing gear, and combination inspection.

When can I take the CDL skills test after passing knowledge tests?

NJ MVC says applicants can take the CDL skills test 14 days after passing the knowledge test unless waived, and should practice with a current validated CLP and a qualified CDL licensed person.