Tennessee TDOSHS Permit Practice Test 20
- Questions30
- Correct to pass24
- Passing score80%
- Minimum age15 years
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1. Under the Tennessee implied consent law, what normally happens if an arrested driver refuses the chemical test?
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Answer B: The court suspends driving privileges for twelve months
Driving in Tennessee implies consent to alcohol or drug testing, and a refusal after arrest normally leads the court to suspend driving privileges for twelve months.
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2. The added lane warning sign tells a driver that
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Answer A: an extra lane begins ahead, so entering traffic does not have to merge into an existing lane
Where a lane is added, traffic entering the roadway gets a lane of its own, so merging is not required, although drivers should still watch the vehicles beside them.
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3. When are you expected to switch from high beams to low beams?
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Answer D: When a vehicle approaches from ahead or you come up behind another vehicle
High beams blind other drivers, both those coming toward you and those you follow through their mirrors. Dim them whenever another vehicle is within range.
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4. Which combination best reduces the chance of hydroplaning?
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Answer D: Good tread depth, correct tire pressure and lower speed in the rain
Tread channels water away, correct pressure keeps the tire's shape, and lower speed gives the tire time to push water aside. Hydroplaning can begin at surprisingly modest speeds.
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5. You and an opposing driver reach a four-way stop at the same time and both of you are turning right. What should happen?
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Answer C: Both may turn at the same time into their own lanes
Two opposing right turns take drivers into different lanes without crossing, so both can proceed together once pedestrians are clear.
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6. You want to turn left at an intersection with no signs or signals and a vehicle is coming straight toward you from the opposite direction. What must you do?
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Answer C: Yield and turn after the oncoming vehicle has passed
A driver turning left always gives way to oncoming traffic that is close enough to be a hazard, whether or not the intersection is controlled.
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7. On a divided highway you see a median opening marked for authorized vehicles only. May you use it to turn around?
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Answer D: No, those openings are for emergency and maintenance vehicles
Official crossovers are reserved for emergency and highway maintenance use; turning there puts a slow vehicle across high-speed traffic.
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8. What must you do before changing lanes, in addition to signaling and checking your mirrors?
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Answer D: Glance over your shoulder to check the blind spot the mirrors do not cover
Mirrors leave an area beside and behind the vehicle that they cannot show, so a quick head check is needed before the vehicle moves sideways.
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9. A driver ahead brakes for no reason you can see, again and again. What should you do?
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Answer B: Increase your following distance and be ready for yet another stop
Unexplained braking tells you the driver is unsure or distracted, so the safe answer is more room, not less.
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10. You have just driven through a deep puddle and your brakes feel weak. What should you do?
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Answer D: Drive slowly while lightly applying the brakes until they dry and work normally
Wet brakes grip poorly and may pull to one side. Gentle braking at low speed generates heat that dries the pads and discs quickly.
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11. May you exceed the posted speed limit in order to complete a pass?
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Answer C: No, the posted limit applies while you are passing too
The limit does not lift for passing; if you cannot complete the pass within it, there is not enough room and you should stay back.
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12. You are about to pass a long tractor-trailer on a two-lane road. What should you expect?
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Answer B: You will need more clear road, since the vehicle is much longer
A tractor-trailer can be 70 feet long, so passing it takes more distance and more time than passing a car at the same speed difference.
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13. An entrance ramp joins a highway just before an exit ramp leaves it. What should you expect in that short section?
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Answer D: Vehicles crossing paths as some enter and others leave
In a weaving section entering traffic moves left while exiting traffic moves right over the same short stretch, so lane changes there need extra room and extra care.
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14. You have started to pass and you see the no-passing zone beginning ahead. What should you do?
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Answer D: Ease off, drop back and return to your own lane
A pass must be completed before the no-passing zone starts. If it will not fit, abandon it and slot back in behind.
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15. Your light turns green, but a vehicle from the cross street is still finishing a turn inside the intersection. What should you do?
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Answer B: Wait until that vehicle has cleared the intersection
A green indication lets you proceed only after yielding to pedestrians in the crosswalk and to vehicles already lawfully within the intersection.
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16. What must a driver be ready to do along the stretch of road where this sign is posted?
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Answer D: Slow down and stop for a child who steps into the roadway
Children misjudge speed and distance and act without warning, so the driver reduces speed, covers the brake and scans the sidewalks and parked vehicles.
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17. You brake hard in a vehicle with antilock brakes and feel the pedal pulsing under your foot. What should you do?
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Answer A: Keep firm, steady pressure on the pedal and steer where you need to go
The pulsing is the system releasing and reapplying the brakes so the wheels keep rolling, which is what lets you steer while braking. Pumping the pedal defeats it.
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18. Heavy rain has left standing water on the road where this sign is posted. What does the law expect of the driver?
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Answer C: Driving below the posted figure, at a speed that suits the conditions
Drivers must adapt to conditions, so in rain, fog, snow or dense traffic the safe speed falls below the posted maximum and keeping to that maximum can itself be an offense.
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19. Why is a sign reading BRIDGE ICES BEFORE ROAD worth heeding even when the road itself is merely wet?
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Answer C: Cold air passes under a bridge as well as over it
A bridge deck loses heat from below as well as above, so it can be frozen while the road on either side of it is only wet.
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20. You want to turn right at a steady red light and no sign prohibits the turn. What is required?
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Answer B: Come to a complete stop, then yield to traffic and pedestrians before turning
A right turn on a steady red is permitted only after a complete stop and only after yielding to cross traffic and to pedestrians, and a posted sign can prohibit it entirely.
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21. At an intersection that uses a lagging left turn, when is the left-turn arrow displayed?
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Answer B: After the through movement has run
A lagging left turn phase runs at the end of the green rather than the start, so a driver waiting to turn should not assume the arrow has been missed.
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22. You decide to turn around using a driveway on your right. What is the safer way to do it?
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Answer C: Stop past the driveway, reverse into it, then pull out and drive away
Passing the driveway and backing in means you reverse off the roadway and then rejoin traffic facing forward, with a full view of both directions.
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23. Your car is sinking after leaving the road into deep water and two children are in the back. In what order should you act?
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Answer D: Free yourself from the belt first, then release the children, the oldest one first
You cannot help anyone while you are still belted in, and the oldest child released first needs the least help getting out.
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24. When is it acceptable to reach into the back seat for something while driving?
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Answer A: Never; stop somewhere safe instead
Twisting round takes your eyes off the road and your control of the wheel with it, so anything in the back seat waits until the car is stopped.
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25. Why is passing on a curve prohibited even when the traffic seems light?
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Answer C: You cannot see far enough around it to know the lane is clear
A pass is only as safe as the distance you can see, and a curve hides the very lane the maneuver uses.
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26. You are on an entrance ramp joining a busy freeway. What should you do with your speed in the acceleration lane?
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Answer D: Build it up to about the speed of the traffic you are joining
Merging works when your speed matches the traffic stream, because a large speed difference forces the drivers already on the freeway to brake or swerve.
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27. Which of these makes you unpredictable to other drivers?
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Answer B: Changing lanes suddenly without signaling, to save a moment
An unsignalled, sudden lane change gives nobody time to react and is a common cause of sideswipe collisions.
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28. What does a posted speed limit sign represent?
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Answer B: The maximum speed permitted under ideal conditions
A speed limit is an upper limit that assumes good weather, good visibility and light traffic, so the safe speed is often lower than the posted figure.
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29. A sign at the approach to a bridge reads WEIGHT LIMIT 10 TONS. What does the figure set?
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Answer B: The heaviest vehicle the bridge may legally carry
A weight limit sign is a regulation based on what the structure can bear, and it applies to the loaded weight of the whole vehicle.
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30. You are starting from a stop on a snowy, icy street and the drive wheels begin to spin. What should you do?
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Answer C: Ease off the accelerator and start again more gently
Spinning tires polish the surface and dig in. Very gentle pressure on the accelerator, and a higher gear if you have one, gives the tires the best chance to grip.