Wyoming CDL — General Knowledge practice
Wyoming CDL — General Knowledge: Handling Emergencies practice test
What to do when things go wrong — brake failure, tire blowouts, skids, and stalling on railroad tracks.
Content reviewed against official driver handbooks · August 12, 2026
13 questions · pass with 10 correct. You get instant feedback and an explanation after every answer.
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12 sample Handling Emergencies 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. When does an antilock braking system activate?
Correct answer: Only at the point a wheel is on the verge of locking
ABS is an addition to the normal brakes and comes into play only when wheels are about to lock up. At all other times the brake system works normally.
Source: Wyoming Commercial Driver License Manual — Section 2.18, Anti-lock Braking Systems (ABS)
2. A drive-wheel braking skid is correcting and the vehicle turns back on course. Why does the manual say you must counter-steer quickly?
Correct answer: The vehicle tends to keep on turning, and you may skid in the opposite direction
A vehicle returning to its course tends to keep turning. Without a quick turn of the wheel the other way, you can end up skidding the opposite way.
Source: Wyoming Commercial Driver License Manual — Section 2.19.2, Correcting a Drive-Wheel Braking Skid
3. Wyoming's winter tips single out four-wheel-drive vehicles with a high center of gravity. What is the concern?
Correct answer: A skid is more apt to tip them over
The tips warn that a four-wheel-drive vehicle with a high center of gravity is the kind more likely to go over when it skids.
Source: Wyoming Commercial Driver License Manual — Section 2, Tips for driving in Wyoming during winter
4. What does the manual say about brakes that are kept in good condition?
Correct answer: They rarely fail
The brake failure section opens by saying brakes kept in good condition rarely fail, and that most hydraulic brake failures come from loss of hydraulic pressure or from brake fade on long hills.
Source: Wyoming Commercial Driver License Manual — Section 2.17.3, Brake Failure
5. Your drive wheels are spinning from acceleration on a very slippery surface. Besides taking your foot off the accelerator, what does the manual say to do?
Correct answer: Push the clutch in, so the engine cannot keep the wheels from rolling freely
Acceleration skids are usually stopped by coming off the accelerator. When it is very slippery the manual adds pushing in the clutch, because otherwise the engine can stop the wheels from turning freely and regaining traction.
Source: Wyoming Commercial Driver License Manual — Section 2.19.1, Drive-Wheel Skids
6. An emergency turn takes a firm two-handed grip. How does the manual say to make sure you have one?
Correct answer: Keep both hands on the wheel all the time
A quick turn takes a firm two-handed grip, and the manual says the best way to have that grip in an emergency is to keep both hands on the wheel at all times.
Source: Wyoming Commercial Driver License Manual — Section 2.17.1, Steering to Avoid a Crash
7. What can a coolant hose that breaks while you are driving lead to?
Correct answer: Failure of the engine, and possibly a fire
The hot-weather checks say coolant hoses must be in good condition because a hose that breaks on the road can cause engine failure and even a fire.
Source: Wyoming Commercial Driver License Manual — Section 2.14.1, Vehicle Checks
8. According to Wyoming's winter tips, what should you do if you begin to skid?
Correct answer: Steer gently into the skid and come off the gas until control returns
The tips say that if a skid starts, you turn gently into it and ease off the accelerator until you have control again.
Source: Wyoming Commercial Driver License Manual — Section 2, Tips for driving in Wyoming during winter
9. What does the manual say about many commercial vehicles built before the dates when ABS became required?
Correct answer: They have been voluntarily equipped with ABS
After listing the dates on which ABS became mandatory, the manual notes that many commercial vehicles built earlier were fitted with ABS voluntarily.
Source: Wyoming Commercial Driver License Manual — Section 2.18.2, Vehicles Required to Have Anti-lock Braking Systems
10. Why do the rear wheels tend to slide sideways in a rear-wheel braking skid?
Correct answer: A wheel that is locked grips less than one that is rolling
When the rear drive wheels lock they have less traction than the rolling front wheels, so they slide sideways as if trying to catch up with the front.
Source: Wyoming Commercial Driver License Manual — Section 2.19.1, Drive-Wheel Skids
11. When notifying authorities after a crash, what does the manual tell you to try to work out?
Correct answer: Your whereabouts, so the location you report is exact
The manual says to try to determine where you are so that the police can be given an exact location.
Source: Wyoming Commercial Driver License Manual — Section 2.20.2, Notify Authorities
12. Your vehicle is stuck on railroad tracks. What is the first thing the manual tells you to do?
Correct answer: Leave the vehicle and move away from the tracks
If you get stuck for any reason, you get out and away from the tracks first. Then you look for emergency notification information at the crossing and call 911 or another emergency number.
Source: Wyoming Commercial Driver License Manual — Section 2.15.6, Special Situations
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