Iowa DOT Motorcycle Practice Test 47
- Questions25
- Correct to pass20
- Passing score80%
- Minimum age14 years
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1. Traffic ahead of you has stopped in your lane while the next lane is still moving. What is the first thing to do?
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Answer C: Slow down first and check the next lane before moving over
Braking is the action that keeps you from hitting the stopped traffic, and the lane change is only safe once you have looked.
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2. A bicyclist ahead of you puts the left arm straight out to the side. What is being signaled?
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Answer B: A left turn or a move to the left
The left arm held straight out is the bicycle signal for a left turn, so hold back and give the rider room to cross toward the center.
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3. You are hosting a party and a guest who has been drinking wants to drive home. What should you do?
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Answer D: Stop serving and arrange a ride or a bed
Only time removes alcohol, so a host who wants to prevent a crash has to remove the driving, not try to speed up sobering that cannot be sped up.
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4. A helmet falls from the seat onto a hard floor but shows no cracks. What should the owner do?
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Answer C: Replace it or have it checked, because the liner can be crushed inside
The foam liner can be compressed with no outside sign, and crushed foam will not absorb a second impact, so a helmet that has taken a hard knock should be replaced.
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5. Why is following distance measured in seconds rather than in car lengths?
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Answer A: Because a time gap automatically grows with speed, while a fixed number of car lengths does not
A gap counted in seconds keeps the same margin of reaction time at any speed, whereas a fixed number of car lengths becomes far too small as speed rises.
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6. You are driving along a street lined with parked cars. What should you watch for?
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Answer B: Doors opening, vehicles pulling out and pedestrians stepping from between cars
Parked cars hide people and can move without warning. Keep as much space from them as you safely can and cover the brake.
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7. A driver disregards this sign and turns so as to travel against the direction it establishes. What is the immediate danger?
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Answer D: The driver will face traffic head on, because every lane comes the other way
Turning against the established direction puts the vehicle nose to nose with all the traffic on that street, which is why the mistake has to be corrected at once.
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8. About how much alcohol can the body eliminate per hour?
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Answer A: About one standard drink
The liver removes alcohol at a nearly fixed rate of roughly one standard drink per hour. Drinking faster than that raises the blood alcohol level, and nothing speeds the process.
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9. An arrow panel at a work zone displays a flashing arrow pointing to the left. What does it require?
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Answer C: Move out of the closed lane into the lane on the left
A flashing or sequential arrow on an arrow panel directs traffic out of a closed lane and into the lane the arrow points to.
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10. Fog thickens until you can barely make out the vehicle ahead. What is the safest action?
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Answer A: Slow right down and, if needed, leave the road at a safe place
In heavy fog the only safe speed may be very low, and if it drops below what the road allows, the answer is to pull well clear of the traffic lanes.
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11. A yellow pennant, an isosceles triangle with its long axis horizontal, is reserved for which message?
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Answer D: No passing zone
The pennant shape is used only for the no passing zone sign, which marks the point where overtaking is no longer allowed.
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12. You are on a country road with no sidewalk and two people are walking toward you on your side of the shoulder. What should you do?
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Answer C: Slow down and move over to give them room
Where there is no sidewalk, people are expected to walk on the shoulder facing traffic, and drivers must slow and give them space.
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13. How should riders in a staggered formation pass another vehicle?
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Answer D: One rider at a time
Passing one rider at a time keeps each pass short and prevents the group from occupying the other lane longer than necessary.
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14. After turning right you see a sign showing that your lane ends a short way ahead. What should you do?
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Answer B: Signal and merge into the next lane while there is still room
Merge early and smoothly while a gap is still available, rather than running out of pavement or forcing your way in at the last moment.
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15. A traffic signal is dark and you reach the intersection at the same moment as a vehicle on your right. Who goes first?
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Answer A: The vehicle on your right, as at any all-way stop
A dark signal is treated as an all-way stop, and the usual tie-breaker then applies: the vehicle on the right goes first.
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16. You are stopping for a red light in the rain and your stopping point is on a wide painted stop line and crosswalk. What should you do?
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Answer C: Slow earlier and gently, since wet paint offers much less grip than pavement
Painted stop lines and crosswalks turn slick when wet, so start braking early and squeeze gently rather than braking hard on the markings.
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17. At many crossings the walk indication appears only after a button is pressed. What happens if a pedestrian does not press it?
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Answer B: The signal may cycle without showing a walk indication
An actuated pedestrian phase is called in by the pushbutton, so without it the controller may serve the vehicle movements alone.
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18. The crossbuck, formed by two rectangular arms crossed in an X, is placed
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Answer D: on each highway approach to a railroad grade crossing
The crossbuck marks the location of a highway-rail grade crossing and is required on each highway approach to that crossing.
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19. For an alert driver, about how long is the reaction time once a hazard has been recognized?
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Answer A: About three quarters of a second
Reaction alone takes roughly three quarters of a second for an alert driver, and perception takes about as long again, so a second and a half of travel is added before the brakes bite.
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20. A small plate under a stop sign reads CROSS TRAFFIC DOES NOT STOP. What is it telling you?
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Answer D: Traffic on the cross street is not required to stop at all
The plate warns that the other road is uncontrolled, so you must wait for a gap instead of expecting anyone to take turns with you.
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21. After an hour on a hot highway your tire pressure reads higher than it did in the morning. What should you do?
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Answer D: Nothing, because pressure rises when tires heat up
Air expands as the tire warms, so a hot reading is normally above the cold setting. Bleeding air off would leave the tire underinflated once it cooled.
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22. A yellow diamond shows two lanes narrowing into one. What does it require of a driver?
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Answer D: Adjusting speed and merging before the lane disappears
The lane ends sign gives notice that one lane will be dropped, so drivers should adjust speed and blend into the continuing lane in good time.
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23. Where in the United States may a motorcycle ride between lanes of traffic?
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Answer C: Only where a state has specifically authorized it
Riding between lanes is prohibited in most states and permitted only where a state law expressly allows it, so a rider must know the rule for the state being ridden in.
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24. A sign warns that your exit leaves from the left side of the freeway. What should you do?
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Answer D: Move into the left lane in good time before you reach the exit
Left-hand exits are unusual, which is exactly why they are signed well in advance and why the lane changes should be finished early.
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25. An angry driver is following you closely and gesturing at you. What is the safe response?
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Answer B: Drive to a police station or to a busy public place and call for help
Never stop to confront an aggressive driver and never lead one home; go somewhere public and get the police involved.