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300+ Free Nebraska CDL General Knowledge Practice Questions

Pass your Nebraska Commercial Driver License General Knowledge Test exam on the first try — instant access, no signup required.

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According to FMCSA regulations, how soon after starting a trip must a driver inspect their cargo and securing devices?

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2026 Statistics

Key Facts: Nebraska CDL General Knowledge Exam

80%

Minimum passing score for CDL knowledge tests

FMCSA / 49 CFR 383.135

At least 30

Minimum basic knowledge-test items

FMCSA States CDL Knowledge & Skills Test

20

General knowledge areas for CMV operators

49 CFR 383.111(a)

14 days

Minimum Nebraska CLP holding period before CDL skills test

Nebraska DMV CDL Testing

1 day

Minimum Nebraska retest wait after failed written or skills tests

Nebraska DMV CDL Testing

$60

Nebraska 5-year commercial license total fee

Nebraska DMV Commercial Driver’s License

Nebraska CDL applicants use Nebraska DMV CDL resources and the Nebraska CDL Driver’s Manual to prepare for knowledge testing. FMCSA sets the national floor: each basic CDL knowledge test covers the general areas in 49 CFR 383.111(a), has at least 30 items, and requires 80% correct to pass. Nebraska DMV states CLP holders must hold the permit at least 14 days before taking a CDL skills test and that a one-day wait applies after failed written or skills tests. Use General Knowledge practice for the core test, then add air-brake, combination-vehicle, or endorsement study when those tests apply.

Sample Nebraska CDL General Knowledge Practice Questions

Try these sample questions to test your Nebraska CDL General Knowledge exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 300+ question experience with AI tutoring.

1What is the first step in the seven-step pre-trip inspection method?
A.Approach the vehicle and check its general condition
B.Check under the hood
C.Start the engine and inspect inside the cab
D.Walk around and inspect the entire vehicle
Explanation: The first step of the seven-step pre-trip inspection is to approach the vehicle and look at its general condition. This includes checking for damage, whether the vehicle is leaning to one side, and looking under the vehicle for fresh leaks of oil, coolant, grease, or fuel. This initial overview can immediately reveal serious problems before you invest time in a detailed inspection.
2During a pre-trip inspection, what should you check in the engine compartment?
A.Only the oil level
B.Oil level, coolant level, power steering fluid, belts, and hoses
C.Only the coolant level and belts
D.Only items visible without opening any caps
Explanation: A thorough engine compartment inspection includes checking the oil level, coolant level in the radiator, power steering fluid, condition of belts and hoses for wear or cracks, and looking for leaks. You should also check the alternator, water pump, air compressor, and any other belt-driven components. Checking only one or two items could mean missing a critical problem that leads to a breakdown or safety hazard on the road.
3Which emergency equipment is required to be on a commercial motor vehicle?
A.Fire extinguisher, spare fuses, and three red reflective triangles
B.First aid kit, fire extinguisher, and flares only
C.Fire extinguisher and road flares only
D.Spare tire, jack, and reflective vest
Explanation: Federal regulations require every commercial motor vehicle to carry a properly charged and rated fire extinguisher (minimum 5 B:C rating, or two 4 B:C extinguishers), spare electrical fuses (unless the vehicle has circuit breakers), and three red reflective warning triangles (or equivalent). These items are checked during inspections and roadside enforcement stops. A vehicle missing any of these required items can be cited for a violation.
4During a pre-trip inspection, the driver notices a coolant leak near the water pump. What should the driver do?
A.Note it on the report and drive carefully to the next service stop
B.Add more coolant and continue the trip
C.Do not drive the vehicle until the leak is repaired
D.Drive only short distances and monitor the temperature gauge
Explanation: A coolant leak is a serious defect that can lead to engine overheating and catastrophic engine failure. The vehicle should not be driven until the leak is repaired. Driving with a coolant leak risks engine damage, potential fire (if coolant contacts hot exhaust components), and could result in a roadside breakdown in an unsafe location. FMCSA regulations require that defects affecting safe operation be corrected before the vehicle is driven.
5What is the minimum tread depth required for steer axle tires on a commercial motor vehicle?
A.2/32 of an inch
B.4/32 of an inch
C.6/32 of an inch
D.1/32 of an inch
Explanation: Federal regulations require steer axle tires to have a minimum tread depth of 4/32 of an inch (approximately 3.2 mm) in every major groove. Steer tires have a higher minimum than other axle positions (which require only 2/32 of an inch) because the steer tires are critical for directional control of the vehicle. Tires below this minimum are considered unsafe and will result in a violation or out-of-service order during an inspection.
6What is the minimum tread depth required for tires on drive and trailer axle positions?
A.4/32 of an inch
B.2/32 of an inch
C.6/32 of an inch
D.1/32 of an inch
Explanation: Tires on drive axles and trailer axles must have a minimum tread depth of 2/32 of an inch in every major tread groove. This is less than the 4/32-inch requirement for steer axle tires because drive and trailer tires, while important for traction and braking, are not as critical for directional control as steer tires. However, insufficient tread on any axle reduces traction, increases stopping distance, and raises the risk of hydroplaning on wet roads.
7During a tire inspection, you notice a bulge on the sidewall of one of the steer tires. What should you do?
A.Continue driving but avoid high speeds
B.Have the tire replaced before driving the vehicle
C.Rotate the tire to a non-steer position
D.Reduce air pressure to alleviate the bulge
Explanation: A sidewall bulge indicates internal structural damage to the tire, meaning the reinforcing plies inside the tire have broken. This is extremely dangerous because the tire can blow out without warning. The tire must be replaced before the vehicle is driven. This is especially critical on steer tires, where a blowout can cause the driver to lose directional control. Reducing air pressure will not fix the problem, and rotating the tire to another position still leaves a dangerously damaged tire on the vehicle.
8How should you adjust your mirrors on a commercial motor vehicle?
A.So you can see only the road behind you
B.So you can see just a small portion of the trailer body along with the road behind and to the sides
C.So you can see only the trailer doors
D.Mirrors only need adjustment when pulling a new trailer
Explanation: Mirrors should be adjusted so that you can see the edge of the trailer body (a small sliver) along the inside edge of the mirror, with the rest of the mirror showing the road behind and to the sides. This gives you a reference point for judging the position of other vehicles relative to your vehicle. Both flat (plane) mirrors and convex mirrors should be properly adjusted. Mirrors should be checked and readjusted anytime you hook up to a different trailer or if they are bumped out of adjustment.
9Which types of lights must be checked during a pre-trip inspection?
A.Only headlights and tail lights
B.Headlights (high and low beam), tail lights, brake lights, turn signals, four-way flashers, clearance/marker lights, and identification lights
C.Only the lights that face forward
D.Only brake lights and turn signals
Explanation: A complete light inspection must include all lights required on the vehicle: headlights (both high and low beams), tail lights, brake lights (stop lights), turn signals, four-way flashers (hazard lights), clearance lights, side marker lights, and identification lights (the three lights at the top center of the front and rear of large vehicles). All of these lights serve specific safety functions for visibility and communication with other drivers. A burned-out light reduces the driver's ability to see or be seen, increasing the risk of an accident.
10Clearance lights on a commercial motor vehicle serve what primary purpose?
A.To illuminate the road directly in front of the vehicle
B.To indicate the overall width and height of the vehicle to other drivers, especially at night
C.To signal lane changes
D.To provide lighting inside the cargo area
Explanation: Clearance lights are required on vehicles over 80 inches wide and over 30 feet long. Their purpose is to make other drivers aware of the overall width, height, and length of the vehicle, especially in darkness or low-visibility conditions. These amber (front) and red (rear) lights are placed at the extreme edges of the vehicle to outline its dimensions. This helps other drivers judge the size of the commercial vehicle and maintain safe clearance when passing or approaching.

About the Nebraska CDL General Knowledge Exam

The Nebraska CDL General Knowledge Test is the basic written knowledge exam for Nebraska commercial learner permit and commercial driver license applicants. Nebraska DMV publishes CDL testing information, the Nebraska CDL Driver’s Manual, and an interactive practice CDL written exam for General Knowledge study. FMCSA requires the basic CDL knowledge test to cover the general knowledge areas in 49 CFR 383.111(a), contain at least 30 items, and require at least 80% correct to pass. The exam emphasizes safe commercial motor vehicle operation: vehicle inspection, basic control, speed and space management, seeing and communication, adverse weather and night driving, emergencies and skids, railroad crossings, mountain driving, cargo securement, driver wellness, alcohol and drug rules, and CDL program basics.

Assessment

Multiple-choice CDL knowledge test covering the basic general-knowledge areas required for commercial motor vehicle operators; air brakes, combination vehicles, and endorsements may require separate tests depending on the license sought.

Time Limit

Not published by Nebraska DMV or FMCSA for the General Knowledge test

Passing Score

At least 80% correct on each CDL knowledge test

Exam Fee

Nebraska commercial license fee is $60 total for a 5-year document; $49 total for more than 3 but not more than 4 years; $38 total for more than 2 but not more than 3 years; $27 total for more than 1 but not more than 2 years; $16 total for 1 year or less; replacement is $16 total; change of class, endorsement, or restriction is $15 total. Third-party CDL skills testers may charge a separate fee. (Nebraska Department of Motor Vehicles)

Nebraska CDL General Knowledge Exam Content Outline

Core general-knowledge area

Vehicle Inspection

Pre-trip, en-route, and post-trip checks; safety-critical components; emergency equipment; tires, wheels, steering, suspension, lights, mirrors, and brake checks.

Core general-knowledge area

Basic Vehicle Control

Starting, stopping, backing, turning, shifting, lane position, off-tracking, tail swing, and safe use of speed before curves and ramps.

Core general-knowledge area

Speed and Space Management

Following distance, stopping distance, merging and crossing gaps, overhead clearance, space cushions, passing, and work-zone adjustments.

Core general-knowledge area

Seeing, Communication, and Hazards

Scanning 12 to 15 seconds ahead, mirror use, signaling, blind spots, hazard recognition, aggressive drivers, and distracted-driving risk.

Core general-knowledge area

Adverse Conditions and Mountain Driving

Night driving, fog, rain, hydroplaning, snow, ice, hot weather, wind, downgrades, brake fade, escape ramps, and wet brakes.

Core general-knowledge area

Emergencies and Skid Recovery

Tire failure, brake failure, emergency braking, ABS, skids, rollover prevention, fires, crash response, and warning devices.

Core general-knowledge area

Railroad Crossings

Grade-crossing scanning, stopping rules, shifting hazards, low-clearance crossings, and emergency evacuation if stalled on tracks.

Core general-knowledge area

Cargo Securement and Weight

Cargo inspection intervals, blocking and bracing, tiedowns, working load limits, sealed loads, weight distribution, axle limits, and spills.

Core general-knowledge area

Driver Wellness and CDL Rules

Fatigue, medical fitness, distraction, alcohol and controlled-substance rules, CLP/CDL basics, ELDT, Nebraska testing procedures, and FMCSA standards.

How to Pass the Nebraska CDL General Knowledge Exam

What You Need to Know

  • Passing score: At least 80% correct on each CDL knowledge test
  • Assessment: Multiple-choice CDL knowledge test covering the basic general-knowledge areas required for commercial motor vehicle operators; air brakes, combination vehicles, and endorsements may require separate tests depending on the license sought.
  • Time limit: Not published by Nebraska DMV or FMCSA for the General Knowledge test
  • Exam fee: Nebraska commercial license fee is $60 total for a 5-year document; $49 total for more than 3 but not more than 4 years; $38 total for more than 2 but not more than 3 years; $27 total for more than 1 but not more than 2 years; $16 total for 1 year or less; replacement is $16 total; change of class, endorsement, or restriction is $15 total. Third-party CDL skills testers may charge a separate 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

Nebraska CDL General Knowledge Study Tips from Top Performers

1Read the Nebraska CDL Driver’s Manual before drilling practice questions; Nebraska DMV says its practice CDL written exam is a study guide used with the manual, not an alternative to studying the manual.
2Separate General Knowledge from add-on tests: air brakes, combination vehicles, and endorsements may require additional preparation and separate knowledge tests.
3Practice inspection questions until you can explain both what to inspect and why each defect creates a safety risk.
4Give extra attention to speed, space, downgrades, adverse weather, railroad crossings, skids, and emergencies because these areas test judgment rather than simple memorization.
5Review missed questions by category and return to the matching Nebraska manual section or FMCSA rule rather than memorizing answer letters.
6Confirm current Nebraska DMV documents, fees, office procedures, ELDT status, and testing logistics before visiting a licensing office.

Frequently Asked Questions

Who administers the Nebraska CDL General Knowledge Test?

The Nebraska Department of Motor Vehicles administers Nebraska CDL licensing and publishes CDL testing information, CDL documentation requirements, the Nebraska CDL Driver’s Manual, and the official CDL practice test link.

How many questions are on the Nebraska CDL General Knowledge Test?

FMCSA requires each basic CDL knowledge test to contain at least 30 items. Nebraska DMV does not publish a separate public General Knowledge item count on the CDL testing page, so applicants should treat 30 as the federal minimum and confirm current office procedures with Nebraska DMV.

What score do I need to pass?

FMCSA requires applicants to correctly answer at least 80% of the questions on each CDL knowledge test, including general and endorsement knowledge tests.

How long must I hold a Nebraska CLP before the CDL skills test?

Nebraska DMV states drivers must have a valid Commercial Learner’s Permit and hold it for a minimum of 14 days before taking a CDL skills test.

What happens if I fail a Nebraska CDL written or skills test?

Nebraska DMV states at least a one-day waiting period is required to retest when written or skills tests are failed.

What should I study for Nebraska CDL General Knowledge?

Study the Nebraska CDL Driver’s Manual and Nebraska DMV CDL testing page, focusing on inspection, basic control, shifting, speed and space, seeing and communication, adverse conditions, emergencies, railroad crossings, mountain driving, cargo securement, fatigue, alcohol and drug rules, and CDL basics.