Missouri: Signals and vehicle controls — Part 5 Practice Test
Questions in this part include: “Which vehicle must have air pollution control devices as originally installed by the manufacturer?” · “You have a truck licensed in excess of 12,000 pounds and receive only one plate. Where must it be placed?”
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Questions are original and based on the official manual "Missouri Driver Guide" (Revised August 2026), Missouri Department of Revenue.
All 18 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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Which vehicle must have air pollution control devices as originally installed by the manufacturer?
- One made after 1967 without a diesel motor
- One made after 1967 that has a diesel motor
- One made before 1967 that is not diesel
- One made after 1967 only if it is a truck
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Correct answer: One made after 1967 without a diesel motor
A vehicle made after 1967 that does not have a diesel motor must have air pollution control devices as originally installed by the manufacturer.
Source: Missouri Driver Guide (Revised August 2026), page 84 · Open this page in the manual (Manual page 84)
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What must be true of the fuel system, including all lines, hoses, connections, and tanks?
- It must be replaced by a dealer every five years
- It must be fitted with a locking gas cap
- It must be firmly attached and must not leak
- It must be shielded by a metal plate underneath
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Correct answer: It must be firmly attached and must not leak
The fuel system must be firmly attached and must not leak.
Source: Missouri Driver Guide (Revised August 2026), page 84 · Open this page in the manual (Manual page 84)
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Trucks without rear fenders must have mud flaps if they are registered for over how many pounds?
- 8,000 pounds
- 24,000 pounds
- 16,000 pounds
- 30,000 pounds
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Correct answer: 24,000 pounds
Trucks without rear fenders that are registered for over 24,000 pounds must have mud flaps.
Source: Missouri Driver Guide (Revised August 2026), page 84 · Open this page in the manual (Manual page 84)
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How high above the ground may the bumper on a passenger vehicle be at its highest point?
- No more than 12 inches
- No more than 30 inches
- No more than 36 inches
- No more than 22 inches
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Correct answer: No more than 22 inches
Bumpers on passenger vehicles may not exceed 22 inches above the ground, measured at the highest point.
Source: Missouri Driver Guide (Revised August 2026), page 84 · Open this page in the manual (Manual page 84)
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What determines commercial vehicle bumper heights?
- Gross vehicle weight rating
- The number of axles
- The length of the vehicle
- The model year
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Correct answer: Gross vehicle weight rating
Commercial vehicle bumper heights are determined by gross vehicle weight rating.
Source: Missouri Driver Guide (Revised August 2026), page 84 · Open this page in the manual (Manual page 84)
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What must the frames around your license plates not do?
- Be made of plastic
- Have a dealer’s name on them
- Cover any part of the plates
- Be painted a dark color
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Correct answer: Cover any part of the plates
Plates must be securely fastened with all parts visible and clean, and frames must not cover any part of the plates.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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If you receive two license plates, where must you place them?
- Both on the back of your vehicle, one above the other
- One on the front and one on the back of your vehicle
- Both on the front of your vehicle, side by side
- One on each side of your vehicle near the doors
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Correct answer: One on the front and one on the back of your vehicle
When you receive two plates, one goes on the front and one on the back.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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Where must the one license plate for a trailer or a motorcycle be placed?
- On the front of the vehicle
- On the left side of the vehicle
- Anywhere that it is visible
- On the back of the vehicle
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Correct answer: On the back of the vehicle
A trailer or a motorcycle receives only one plate, which must be on the back of the vehicle.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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You have a truck licensed in excess of 12,000 pounds and receive only one plate. Where must it be placed?
- On the front of the truck
- On the rear of the truck
- On the driver’s door
- On the left rear fender
Show answer
Correct answer: On the front of the truck
A truck licensed in excess of 12,000 pounds receives one plate, which must be placed on the front of the truck.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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What must shine on the rear license plate of your vehicle so the plate can be seen from 50 feet?
- A yellow light
- A red light
- A white light
- A blinking amber light
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Correct answer: A white light
Your vehicle must have a white light shining on the rear license plate so the plate can be seen from 50 feet.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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Something in your vehicle overhangs the rear by more than how many feet before you need special equipment?
- Two feet
- Five feet
- Three feet
- Eight feet
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Correct answer: Five feet
Special equipment is needed if something in your vehicle overhangs the rear by more than five feet.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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During the day, what must be on the end of a projection that overhangs the rear by more than five feet?
- A yellow flag or cloth at least 12 inches square
- A red flag or cloth at least 6 inches square
- A white flag or cloth at least 24 inches square
- A red flag or cloth at least 16 inches square
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Correct answer: A red flag or cloth at least 16 inches square
During the day the end of the projection must have a red flag or cloth that is at least 16 inches square.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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From half an hour after sunset until half an hour before sunrise, what must the end of a rear projection have?
- A red light
- A white light
- A flashing amber light
- A reflective orange flag
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Correct answer: A red light
The end of the projection must have a red light from half an hour after sunset until half an hour before sunrise.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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When you are towing another vehicle, your towline must keep the two vehicles within what distance of each other?
- 5 feet
- 25 feet
- 15 feet
- 50 feet
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Correct answer: 15 feet
When towing another vehicle, the towline must keep the vehicles within 15 feet of each other.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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When you are towing another vehicle, what is required from half an hour after sunset until half an hour before sunrise?
- Only the towing vehicle needs lights on
- Both vehicles must have lights on
- Both vehicles must display a red flag
- Only the towed vehicle needs lights on
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Correct answer: Both vehicles must have lights on
From half an hour after sunset until half an hour before sunrise, both the towing and towed vehicles must have lights on.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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Where must a “slow moving vehicle” sign be placed on a vehicle?
- On the front, near the middle, and two feet above the road
- On the rear, near the bumper, and one foot above the road
- On the left side, near the door, and six feet above the road
- On the rear, near the middle, and four feet or more above the road
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Correct answer: On the rear, near the middle, and four feet or more above the road
The slow moving vehicle sign must be on the rear of the vehicle, near the middle, and four feet or more above the road, clean and reflective.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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During what dates may your vehicle have studded snow tires?
- Only from November 1 to April 1
- Only from October 1 to March 1
- Only from December 1 to March 15
- All year long
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Correct answer: Only from November 1 to April 1
Your vehicle may have studded snow tires only from November 1 to April 1.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)
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Tinting or sun-screening material is permitted on the side and rear windows. What limit applies to front door windows?
- No more than 35% light blockage
- No more than 50% light blockage
- No more than 65% light blockage
- No more than 80% light blockage
Show answer
Correct answer: No more than 65% light blockage
Front door windows may have tinting of no more than 65% light blockage.
Source: Missouri Driver Guide (Revised August 2026), page 85 · Open this page in the manual (Manual page 85)