North Carolina: Signals & vehicle controls — Part 4 Practice Test
Questions in this part include: “What do a vehicle's emergency warning flashers do?” · “According to the driving green tips, when should you roll down the windows and when should you use the air conditioning?”
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Questions are original and based on the official manual "North Carolina Driver Handbook" (Revised May 2025), North Carolina Division of Motor Vehicles (NCDMV).
All 17 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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What do a vehicle's emergency warning flashers do?
- Flash only the two rear lights
- Flash all four turn signal lights
- Flash the headlights and horn
- Flash the brake lights only
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Correct answer: Flash all four turn signal lights
The manual says the emergency warning device flashes all four turn signal lights.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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For what may any vehicle use emergency flashers?
- To show that you are following the vehicle ahead too closely
- To ask other drivers to let you merge into their lane
- To show that you are about to turn right at an intersection
- To warn of a possible danger or that a vehicle is disabled
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Correct answer: To warn of a possible danger or that a vehicle is disabled
The manual says any vehicle can use the flashers to warn of a possible danger or that a vehicle is stopped or disabled.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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What is the purpose of "driving green"?
- To decrease the amount of fuel you use with simple habits
- To reduce the vehicle's speed to below 40 mph on all roads
- To increase the speed of the vehicle in a safe manner
- To avoid the use of headlights and windshield wipers
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Correct answer: To decrease the amount of fuel you use with simple habits
The manual says driving green means adopting a few simple, inexpensive habits to decrease the fuel you use.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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How much can every five miles over 60 mph cost you, according to the driving green tips?
- Up to an additional 10 cents a gallon
- Up to an additional 50 cents a gallon
- Up to an additional 30 cents a gallon
- Up to an additional one dollar a gallon
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Correct answer: Up to an additional 30 cents a gallon
The manual says every five miles over 60 mph can cost up to an additional 30 cents a gallon.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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According to the driving green tips, what happens when you carry extra weight?
- Your vehicle uses less fuel
- Your vehicle must work harder
- Your tires wear on the edges only
- Your brakes stop the vehicle faster
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Correct answer: Your vehicle must work harder
The manual says that when you carry extra weight, your vehicle must work harder.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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How often do the driving green tips say to check tire pressure?
- Once a week
- Once every six months
- Once a year
- Once a month
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Correct answer: Once a month
The manual says to check tire pressure once a month and keep tires properly inflated.
Source: North Carolina Driver Handbook (Revised May 2025), page 67 · Open this page in the manual (Manual page 67)
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By how much can abrupt starts and hard stops increase fuel consumption?
- 40%
- 10%
- 20%
- 60%
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Correct answer: 40%
The manual says abrupt starts and hard stops can increase fuel consumption by 40%.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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According to the driving green tips, when should you turn off the engine?
- If you are waiting for more than an hour or so
- Every time you stop at a traffic signal or stop sign
- If you are waiting for more than a couple of minutes
- If you are waiting for more than thirty seconds
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Correct answer: If you are waiting for more than a couple of minutes
The manual says to turn off the engine if you are waiting for more than a couple of minutes.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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According to the driving green tips, when should you roll down the windows and when should you use the air conditioning?
- Windows down above 40 mph, air conditioning below 40 mph
- Windows down below 40 mph, air conditioning above 40 mph
- Windows down above 60 mph, air conditioning below 60 mph
- Air conditioning at all speeds, with the windows closed
Show answer
Correct answer: Windows down below 40 mph, air conditioning above 40 mph
The manual says to roll down windows at speeds less than 40 mph and use air conditioning at more than 40 mph.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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How many gallons of fuel can you save by using cruise control for more than 10,000 miles a year?
- 10 gallons
- 30 gallons
- 100 gallons
- 60 gallons
Show answer
Correct answer: 60 gallons
The manual says using cruise control for more than 10,000 miles a year can save 60 gallons of fuel.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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By how much can clogged air filters cut mileage?
- 10%
- 5%
- 25%
- 40%
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Correct answer: 10%
The manual says clogged air filters can cut mileage by 10%.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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How much gas leakage can tightening your fuel cap prevent each year?
- Up to 5 gallons
- Up to 10 gallons
- Up to 30 gallons
- Up to 60 gallons
Show answer
Correct answer: Up to 30 gallons
The manual says tightening the fuel cap can prevent leakage of up to 30 gallons of gas a year.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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What does communicating mean in defensive driving?
- Using the horn to warn all other drivers on the road
- Letting others know what you plan to do early enough
- Waving other drivers through an intersection ahead of you
- Speaking with your passengers about the route to take
Show answer
Correct answer: Letting others know what you plan to do early enough
The manual defines communicating as letting others know what you plan to do early enough to avoid a crash.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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When should you signal your intention?
- Only when you see other vehicles on the road near you
- Only when you turn at an intersection with a traffic signal
- Only when you change lanes on an interstate highway
- Any time you plan to slow down, stop, turn or change lanes
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Correct answer: Any time you plan to slow down, stop, turn or change lanes
The manual says to signal any time you plan to slow down, stop, turn, change lanes or pull away from the curb.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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Should you signal your movements when you do not see other vehicles on the road?
- Yes, be in the habit of always signaling
- No, signal only when others are near
- No, signal only at night
- Yes, but only for left turns
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Correct answer: Yes, be in the habit of always signaling
The manual says to be in the habit of signalling your movements even when you do not see others on the road.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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What must you do before you signal a movement?
- Slow down and come to a complete stop
- Sound your horn to warn the other drivers
- See that the movement can be made safely
- Move into the center of the lane you are in
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Correct answer: See that the movement can be made safely
The manual says that before you signal, you must first see that your movement can be made safely.
Source: North Carolina Driver Handbook (Revised May 2025), page 68 · Open this page in the manual (Manual page 68)
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From where are hand signals given?
- From the driver's window, using the right arm and hand
- From the driver's window, using the left arm and hand
- From the passenger window, using either arm
- From above the roof, using either hand
Show answer
Correct answer: From the driver's window, using the left arm and hand
The manual says hand signals are given from the driver's window using the left arm and hand.
Source: North Carolina Driver Handbook (Revised May 2025), page 69 · Open this page in the manual (Manual page 69)