According to the manual, being awake for 18 hours impairs your driving about as much as what blood alcohol level?
-
A.
.08 percent
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B.
.10 percent
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C.
.05 percent Correct
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D.
.02 percent
The answer is ".05 percent"
The manual compares 18 hours without sleep to driving at a .05 blood alcohol level. Choice B (.10) is the manual's number for being awake 24 hours in a row, given in the very next sentence on the same page, and it is the figure test-takers substitute when the sleep-alcohol comparison blurs.
The traps in the wrong answers
A. .08 percent
This is the standard adult DUI limit, not the manual's 18-hour comparison. This answer defaults to the .08 percent adult DUI legal limit familiar from awareness campaigns instead of the sleep-comparison figure.
B. .10 percent
The manual reserves .10 for a longer stretch without sleep. This answer grabs the neighboring 24-hour BAC figure from the same paragraph, conflating the two fatigue comparisons the manual lists back to back.
D. .02 percent
This is below the impairment level the manual assigns to 18 hours awake. This answer reaches for Pennsylvania's under-21 zero-tolerance BAC of .02 percent instead of the sleep-comparison figure.
This question tests your knowledge of Distracted Driving in Pennsylvania. Source: Pennsylvania Driver Manual, "Lack of Sleep," p.33..
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