North Carolina DMV Practice Test 4

Practice Test 4 covers North Carolina's specific speed limits and precision driving rules — the maximum interstate speed limit for passenger vehicles, the rural two-lane highway speed limit, hydroplaning beginning as low as 35 mph, advisory speed sign on a curve, ABS braking technique, the texting while driving ban and why, the 0.08% adult BAC standard, and the complete range of NC driving laws. North Carolina's interstates — I-85, I-77, I-26 — and Blue Ridge Parkway mountain roads create the context for these rules.

Question 1

Looking for more practice? See all North Carolina DMV practice tests or review the official North Carolina Driver Handbook.

Why Take This North Carolina Practice Test?

Practice Test 4 introduces the NC interstate maximum speed and the 35-mph hydroplaning threshold — both specific NC numbers tested directly on the NCDMV exam. The ABS braking technique is also reinforced here.

Sample Questions from This Test

The questions below come directly from this test's question bank. Each is based on the official North Carolina Driver Handbook. See how many you can answer before starting — then take the full test above for answers and complete explanations.

On most North Carolina interstates, what is the usual maximum speed limit for passenger vehicles?
If there is no speed limit sign on a rural two-lane highway in NC, the usual maximum speed is:
When driving in heavy rain, your tires can begin to hydroplane at speeds as low as:
When approaching a curve with an advisory speed sign, you should:
If your vehicle has an anti-lock braking system (ABS), in an emergency you should:

Take the test above to see correct answers and read the full explanations for every question.

North Carolina NCDMV Topics Covered in This Test

Every question in this test is drawn from the official North Carolina Driver Handbook. Here is a breakdown of the specific topics covered:

NC Interstate Maximum Speed — specific mph for passenger vehicles on NC interstates
NC Rural Two-Lane Highway Speed — specific mph on rural two-lane highways without posted limits
Hydroplaning Starts at 35 mph — risk begins at speeds as low as 35 mph on wet roads
Advisory Speed Curve — slow to or below advisory speed before entering
ABS Emergency Braking — press firmly and hold; do not pump
NC Texting While Driving — illegal; takes eyes off road and hands off wheel
NC Adult BAC Limit — 0.08% for drivers 21 and older
NC Under-21 BAC — any alcohol in system is illegal
Open Containers — trunk or locked glove box only
Aggressive Tailgater — increase forward space, do not brake check
Drowsy Driving Response — pull over and rest; only rest resolves fatigue
No Crash Injuries — move vehicles if safe, exchange information, document
Hill Parking Downhill with Curb — wheels right (toward curb)
Skid Response — ease off gas, steer toward intended direction
Being Passed — do not speed up, maintain or slow slightly

North Carolina NCDMV Test — Key Facts

Knowing the specific numbers and rules before your North Carolina written knowledge test gives you a real advantage. Here are the key facts for this test:

NC interstate maximum speed: Specific mph for passenger vehicles — tested directly on NCDMV exam
NC rural two-lane highway speed: Specific mph without posted limits — tested on NCDMV exam
NC hydroplaning starts at 35 mph: On wet NC roads, hydroplaning risk begins at speeds as low as 35 mph
ABS in NC: Press firmly and hold — do not pump; system pulses automatically
NC texting ban: Illegal because it takes eyes off road, hands off wheel, and mind off driving — triple distraction
NC adult BAC: 0.08% for drivers 21 and older

How to Use This Test Effectively

Getting the most out of your North Carolina DMV practice time takes more than clicking through questions. Use these strategies:

North Carolina's hydroplaning threshold: 35 mph on wet roads. On NC's frequently wet roads — Piedmont rain, hurricane season, coastal storms — tires can begin to hydroplane at speeds as low as 35 mph. Reduce speed in rain to minimize hydroplaning risk.
NC's specific speed limits for interstates and rural roads are both tested. Both the maximum interstate speed and the rural highway speed limit are specific numbers tested on the NC NCDMV exam. Know both from the official North Carolina Driver's Handbook.
ABS braking in NC: press and hold, never pump. On wet NC roads or in emergency situations, press the brake pedal firmly and hold it. ABS pulses automatically to prevent wheel lockup. Pumping the brakes cancels the ABS function.
NC texting ban: triple distraction. Texting while driving is illegal in North Carolina because it creates three simultaneous distractions — visual (eyes off road), manual (hands off wheel), and cognitive (mind off driving). NC specifically tests this triple-distraction concept.
NC aggressive tailgater: increase forward space. When another driver is following too closely on a North Carolina highway, increase the space ahead of your vehicle. This gives you more stopping distance and gradually encourages the tailgater to pass.

Frequently Asked Questions

What does Practice Test 4 cover?

Practice Test 4 covers NC interstate maximum speed, NC rural two-lane highway speed, hydroplaning starting at 35 mph, advisory speed curves, ABS braking, texting ban, adult BAC, under-21 zero tolerance, hill parking downhill, and aggressive tailgater response.

At what speed can hydroplaning begin on North Carolina roads?

As low as 35 mph. On wet North Carolina roads — during the state's frequent rain events — tires can begin to hydroplane at speeds as low as 35 mph. Reduce speed in rain to minimize this risk. The 35-mph threshold is directly tested on the NCDMV exam.

What does NC's texting ban test ask about the danger of texting while driving?

The NC NCDMV exam tests that texting while driving is dangerous because it creates three simultaneous distractions: visual (eyes off road), manual (hands off wheel), and cognitive (mind off driving). This triple-distraction concept is the specific NC exam answer.

How do I use ABS brakes in a North Carolina emergency stop?

Press the brake pedal firmly and hold it down — do not pump the brakes. ABS pulses automatically to prevent wheel lockup. You may feel the pedal vibrate; this is normal. Pumping the brakes would cancel the ABS system.

Am I ready for the real North Carolina NCDMV written knowledge test?

If you are consistently scoring 90% or higher on all five practice tests, the quick test, and all four mini tests, you are well prepared. The NC NCDMV test has 25 questions and requires 80% — you can miss no more than 5.

Complete Study Guide: All 50 Questions with Answers

All 50 questions from North Carolina Practice Test 4 are listed below with correct answers and explanations. This test covers NC's interstate speed, 35-mph hydroplaning threshold, and ABS braking — precision NC rules that require knowing specific numbers.

Q1. On most North Carolina interstates, what is the usual maximum speed limit for passenger vehicles unless signs say otherwise?

Correct answer: 70 mph

Why: Many North Carolina interstates have a 70 mph limit when posted. Always follow the signs for the exact limit.
Q2. If there is no speed limit sign on a rural two-lane highway, the usual maximum speed limit is about:

Correct answer: 55 mph unless posted otherwise

Why: On many rural highways the default maximum speed is 55 mph unless signs show a different limit.
Q3. When driving in a residential area with no posted limit, you should:

Correct answer: Drive at a safe speed, usually around 25–35 mph, and be ready to slow down

Why: Neighborhood streets often have lower limits and many pedestrians and driveways, so you must drive carefully.
Q4. Driving much slower than the posted speed limit can be dangerous because:

Correct answer: You may block traffic and cause other drivers to brake or change lanes suddenly

Why: Very slow driving can surprise other drivers and increase the risk of rear-end collisions.
Q5. When you see a yellow sign with a curved arrow and a speed advisory under it, you should:

Correct answer: Slow to the recommended speed before entering the curve

Why: Advisory speeds help you choose a safe speed for curves, especially in bad weather or at night.
Q6. If you miss your exit on a North Carolina interstate, you should:

Correct answer: Continue to the next exit and then find a safe way to go back

Why: Never stop or back up on the interstate. Go to the next exit and adjust your route.
Q7. When entering an interstate from an on-ramp, you should:

Correct answer: Use the acceleration lane to get up to the speed of traffic and merge into a safe gap

Why: Using the ramp to reach traffic speed lets you merge smoothly instead of forcing other drivers to brake.
Q8. On a multi-lane highway, the left lane is generally used for:

Correct answer: Passing other vehicles

Why: Use the left lane mainly for passing and then return to the right lane when it is safe.
Q9. If another vehicle is trying to pass you on a two-lane road, you should:

Correct answer: Stay in your lane and avoid speeding up

Why: Maintain your speed or slow down slightly so the passing driver can return to the lane quickly.
Q10. Passing is not allowed on two-lane roads when:

Correct answer: There is a solid yellow line on your side of the center line

Why: A solid yellow line on your side means you may not cross it to pass.
Q11. You may legally pass another vehicle on the right only when:

Correct answer: The vehicle ahead is turning left and there is enough room to pass safely on a paved roadway

Why: Passing on the right is allowed only in specific situations and never by driving off the paved part of the road.
Q12. At an intersection with a STOP sign in your direction and no signs or signals for cross traffic, you must:

Correct answer: Stop and yield to any vehicle or pedestrian already in or close to the intersection

Why: After stopping, you must let cross traffic and pedestrians go first if they are close enough to be in danger.
Q13. When turning left at a green light, you must:

Correct answer: Yield to oncoming traffic and pedestrians before turning

Why: Oncoming traffic and pedestrians generally have the right-of-way when you are making an unprotected left turn.
Q14. A flashing yellow arrow for a left turn means you should:

Correct answer: Turn left only after yielding to oncoming traffic and pedestrians

Why: A flashing yellow arrow allows a left turn, but only when there is a safe gap in oncoming traffic.
Q15. A flashing red light at an intersection means you must:

Correct answer: Stop and proceed only when it is safe, like at a stop sign

Why: A flashing red signal is treated like a STOP sign for all directions.
Q16. A flashing yellow light at an intersection means you should:

Correct answer: Slow down and proceed with caution

Why: A flashing yellow warns you of a hazard and tells you to approach carefully.
Q17. When driving through an intersection and the traffic signal turns yellow, you should:

Correct answer: Continue through carefully if you are already in the intersection

Why: If you have already entered the intersection safely, continue through; do not stop suddenly in the middle.
Q18. You must always stop for a school bus with flashing red lights and an extended stop arm when:

Correct answer: You are on a two-lane road, no matter which direction you are traveling

Why: On undivided roads, traffic in both directions must stop for a school bus loading or unloading children.
Q19. On a divided highway with a raised median, a school bus on the opposite side has red lights flashing. In most cases you:

Correct answer: Do not have to stop, but should slow and use extra caution

Why: When there is a physical median, only traffic behind the bus usually has to stop, but you must still watch for children.
Q20. North Carolina’s Move Over law requires you to do what when approaching emergency vehicles stopped with flashing lights on the shoulder?

Correct answer: Slow down and move over one lane away if you can safely do so

Why: Moving over and slowing down protects roadside workers and officers from passing traffic.
Q21. When driving in a work zone with orange signs and workers present, you should:

Correct answer: Slow down, obey the posted work zone speed limit, and be prepared to stop

Why: Work zones often have changing conditions and workers close to traffic, so extra caution is required.
Q22. If a flagger is directing traffic in a work zone, you must:

Correct answer: Follow the flagger’s instructions at all times

Why: Flaggers have the same authority as traffic signals in work zones and you must obey them.
Q23. When you see a pedestrian with a white cane or a guide dog at a crosswalk, you should:

Correct answer: Stop and give the pedestrian the right-of-way

Why: Pedestrians who are blind or visually impaired have the right-of-way and need extra time to cross safely.
Q24. When sharing the road with bicyclists, you should:

Correct answer: Give them plenty of space when passing and be patient

Why: Bicyclists are vulnerable road users, so pass slowly and leave extra room between your vehicle and the bicycle.
Q25. Why should you check twice for motorcycles at intersections and before lane changes?

Correct answer: They are small and can be hard to see in traffic

Why: Motorcycles can be hidden in blind spots or behind larger vehicles, so looking twice helps prevent collisions.
Q26. When driving in heavy rain, your tires can begin to hydroplane at speeds as low as:

Correct answer: 35 mph, depending on tire and road conditions

Why: Standing water and worn tires can cause hydroplaning at moderate speeds, sometimes around 35 mph.
Q27. If your vehicle begins to hydroplane, you should:

Correct answer: Ease off the accelerator and steer straight until your tires regain contact

Why: Sudden braking or steering can cause a loss of control. Gently slowing helps your tires grip again.
Q28. When driving in fog, you should:

Correct answer: Use low-beam headlights and slow down

Why: Low beams reduce glare and make it easier to see in foggy conditions.
Q29. Headlights must be used in North Carolina during which times?

Correct answer: From sunset to sunrise and whenever visibility is reduced

Why: Use headlights at night and when you cannot clearly see the road or other vehicles.
Q30. You should dim your high-beam headlights when you are within about how many feet of an oncoming vehicle?

Correct answer: 500 feet

Why: Dimming high beams at least 500 feet before meeting another vehicle helps avoid blinding the other driver.
Q31. You should dim your high beams when following another vehicle within about:

Correct answer: 200 feet

Why: Using low beams when you are close behind another vehicle reduces glare in their mirrors.
Q32. If your brakes fail while driving, your first step should be to:

Correct answer: Pump the brake pedal and downshift to a lower gear

Why: Pumping the brakes might restore pressure, and downshifting helps slow the vehicle without full braking.
Q33. If a tire suddenly blows out while you are driving, you should:

Correct answer: Hold the steering wheel firmly, ease off the gas, and let the vehicle slow down

Why: Sudden braking or swerving can cause a complete loss of control after a blowout.
Q34. If your accelerator sticks and you cannot free it with your foot, you should first:

Correct answer: Shift to neutral and steer to a safe place off the road

Why: Shifting to neutral lets the engine race without moving the vehicle so you can focus on steering and braking.
Q35. Driving while very tired is especially dangerous because:

Correct answer: You may fall asleep or react too slowly to hazards

Why: Drowsy drivers can drift out of their lane or fail to see dangers in time to react.
Q36. If you begin to feel drowsy while driving, the safest thing to do is:

Correct answer: Pull off the road in a safe place and rest

Why: Short-term tricks do not fix drowsiness; you need to stop and rest.
Q37. North Carolina law prohibits drivers from texting while driving because:

Correct answer: It takes your eyes, hands, and mind away from driving

Why: Texting is a form of distracted driving that greatly increases your chance of a crash.
Q38. For drivers 21 and older, driving with a blood alcohol concentration (BAC) of 0.08% or higher is:

Correct answer: Illegal and considered driving while impaired

Why: A BAC of 0.08% or more can lead to arrest, fines, and license suspension.
Q39. For drivers under 21, having any alcohol in the system while driving is:

Correct answer: Illegal under zero-tolerance rules

Why: Underage drivers are not allowed to have any measurable amount of alcohol in their system while driving.
Q40. Open containers of alcohol are allowed in which part of a moving vehicle?

Correct answer: They are not allowed in the passenger area

Why: Open container laws are meant to discourage drinking in vehicles and keep roads safer.
Q41. If an aggressive driver is tailgating you and trying to pressure you to go faster, you should:

Correct answer: Stay calm, avoid conflict, and move to another lane when it is safe so they can pass

Why: Creating space and letting the aggressive driver go by is the safest response.
Q42. If you are involved in a minor crash with no injuries, you should:

Correct answer: Move the vehicles out of traffic if you can, exchange information, and report as required

Why: Moving vehicles out of the travel lane and exchanging information helps prevent more crashes and follows the law.
Q43. When parking on a hill with a curb and facing downhill, you should turn your front wheels:

Correct answer: Toward the curb

Why: Turning the wheels toward the curb helps keep the vehicle from rolling into traffic if the brakes fail.
Q44. If your vehicle begins to skid because of wet or slippery pavement, you should:

Correct answer: Ease off the accelerator and steer in the direction you want to go

Why: Gently easing off the gas and steering toward your intended path helps you regain control safely.
Q45. Using a seat belt in the front seat of a passenger vehicle:

Correct answer: Helps keep you from being thrown from the vehicle in a crash

Why: Seat belts are one of the best protections against serious injury or death in any collision.
Q46. Children are safest when they are seated:

Correct answer: In the back seat, properly secured in a child safety seat or booster when needed

Why: The back seat and correct child restraints provide the best protection for young passengers.
Q47. Before backing out of a driveway or parking space, you should:

Correct answer: Check behind your vehicle and look over your shoulder while backing slowly

Why: Turning and looking behind you gives the best view of pedestrians, children, and other hazards.
Q48. If bright headlights from an oncoming vehicle make it hard to see, you should:

Correct answer: Look toward the right edge of your lane and use it as a guide

Why: Looking slightly to the right reduces glare while helping you stay in your lane.
Q49. When driving downhill for a long distance, the safest way to control your speed is to:

Correct answer: Shift to a lower gear and use your brakes gently as needed

Why: Using a lower gear helps prevent your brakes from overheating on long descents.
Q50. If your vehicle starts to fishtail on a slippery road, you should:

Correct answer: Steer gently in the direction of the skid and avoid sudden braking

Why: Steering into the skid and staying calm helps you regain control smoothly.