The emergency or parking brake must be strong enough to stop a vehicle traveling at 20 mph within how many feet?
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A.
55 feet Correct
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B.
30 feet
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C.
100 feet
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D.
200 feet
The answer is "55 feet"
The emergency or parking brake must stop the vehicle within 55 feet at 20 mph. A driver who picks 30 feet is confusing the foot-brake rule stated in the sentence before it with the emergency-brake requirement.
The traps in the wrong answers
B. 30 feet
Applies the foot-brake stopping distance to the emergency brake. This answer confuses the 30-foot foot-brake distance in the prior sentence with the emergency-brake rule.
C. 100 feet
Guesses a longer stopping distance no brake rule states. This answer overshoots the emergency-brake figure, perhaps from a rough sense of highway braking distance.
D. 200 feet
Uses the horn or mirror distance in place of a brake performance figure. This answer substitutes the 200-foot horn or mirror figure from the same equipment list for the brake rule.
This question tests your knowledge of Vehicle Equipment in Illinois. Source: Illinois Rules of the Road, "Chapter 12: Equipment For Safe Driving - Required Equipment - Brakes," p.92..
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