Wyoming CDL — General Knowledge practice
Wyoming CDL — General Knowledge: Speed & Space Management practice test
Choosing a safe speed, keeping a space cushion, adjusting for weather and traffic, and understanding stopping distance.
Content reviewed against official driver handbooks · August 12, 2026
11 questions · pass with 9 correct. You get instant feedback and an explanation after every answer.
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11 sample Speed & Space Management questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. In the manual's braking technique for long downgrades, about how long should each brake application last?
Correct answer: About three seconds
Each application is firm enough to feel a definite slowdown and is released once speed has dropped; the manual says it should last roughly three seconds.
Source: Wyoming Commercial Driver License Manual — Section 2.16.4, Proper Braking Technique
2. On the manual's stopping distance chart, which component is the largest at 25 mph?
Correct answer: Perception distance, at 65 feet
At 25 mph the chart shows 65 feet of perception distance, 28 feet of reaction distance and 47 feet of braking distance, for 140 feet in all. Braking distance becomes the largest part only at higher speeds.
Source: Wyoming Commercial Driver License Manual — Section 2.6.1, Stopping Distance
3. On the manual's stopping distance chart, what is the total stopping distance at 35 mph?
Correct answer: 222 feet
The chart shows 222 feet at 35 mph, made up of 91 feet of perception distance, 39 feet of reaction distance and 92 feet of braking distance.
Source: Wyoming Commercial Driver License Manual — Section 2.6.1, Stopping Distance
4. What do Wyoming's winter tips say about highway conditions when a winter storm hits?
Correct answer: They can turn slick, icy and treacherous quickly, so move slowly
The tips warn that a winter storm can make the state's highways slick, icy and treacherous in a hurry, which is why slow travel matters.
Source: Wyoming Commercial Driver License Manual — Section 2, Tips for driving in Wyoming during winter
5. Wyoming's winter tips give a counting method for following distance. After the car ahead passes a landmark, how far do you count?
Correct answer: From 'one-thousand-one' through 'one-thousand-four'
If you reach the landmark before you finish counting through one-thousand-four, the tips say you are following too closely.
Source: Wyoming Commercial Driver License Manual — Section 2, Tips for driving in Wyoming during winter
6. Where do Wyoming's winter tips say sudden changes from a merely wet surface to an extremely icy one often occur?
Correct answer: At bridge decks and overpasses, on high fills, near snow fences and in deep cuts
The tips call black ice invisible and treacherous and list the places where the surface often changes: bridge decks, overpasses, high fills, deep cuts and spots near snow fences.
Source: Wyoming Commercial Driver License Manual — Section 2, Tips for driving in Wyoming during winter
7. According to the manual, what is the most frequent cause when trucks and buses run into the vehicle ahead?
Correct answer: Following too closely
Accident reports show the vehicle in front is the one trucks and buses hit most often, and the manual names following too closely as the most frequent cause.
Source: Wyoming Commercial Driver License Manual — Section 2.7.1, Space Ahead
8. For which trucks does the manual give the rule that the gear for descending a hill is the same one needed to climb it?
Correct answer: Older trucks
The same-gear rule is given for older trucks. Newer trucks, with low-friction parts and streamlined shapes, may need a lower gear going down than they would use going up.
Source: Wyoming Commercial Driver License Manual — Section 2.16.2, Select the Right Gear Before Starting Down the Grade
9. Once you are on the expressway during the road test, what three things must you maintain?
Correct answer: Correct position in the lane, spacing from other vehicles, and speed
Section 13 says that once on the expressway you keep proper lane position, vehicle spacing and vehicle speed, and keep checking traffic in every direction.
Source: Wyoming Commercial Driver License Manual — Section 13.1.5, Expressway
10. A driver assumes that going four times as fast makes braking distance four times as long. What do the manual's figures for 20 mph and 80 mph show?
Correct answer: Both impact and braking distance are 16 times as great
The manual says that raising speed to 80 mph makes impact and braking distance 16 times what they are at 20 mph.
Source: Wyoming Commercial Driver License Manual — Section 2.6.1, Stopping Distance
11. A train will reach a single-track crossing in about 10 seconds. By the manual's figure, is that enough time for a typical tractor-trailer to clear the track?
Correct answer: No; clearing takes at least 14 seconds
The manual's figure for a single track is no less than 14 seconds for a typical tractor-trailer, so 10 seconds is not enough.
Source: Wyoming Commercial Driver License Manual — Section 2.15.5, Crossing the Tracks
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