According to the manual, what should you do before leaving your parked vehicle?
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A.
Turn off the engine, remove the key, and lock all doors Correct
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B.
Roll down a window for air circulation
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C.
Leave the parking lights on
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D.
Set a warning triangle behind the vehicle
The answer is "Turn off the engine, remove the key, and lock all doors"
For this item, the manual's before-leaving sentence lists engine off, key out, and doors locked; it then separately reminds you to check for traffic behind you before getting out. Option D catches drivers who borrow from commercial-vehicle breakdown rules, where a triangle set behind the vehicle is required roadside gear but not part of a passenger car's routine curb-parking checklist.
The traps in the wrong answers
B. Roll down a window for air circulation
Cracking a window is not part of the manual's before-leaving instructions. This answer carries over hot-weather pet and child safety advice about airflow inside a closed car and treats it as a manual-required parking step.
C. Leave the parking lights on
The manual does not tell you to leave lights on when you park at a curb. This answer blends the four-way flasher and 500-foot visibility rule for a vehicle parked on the roadway into the ordinary curb-parking checklist, where those steps do not apply.
D. Set a warning triangle behind the vehicle
A warning triangle is a disabled-vehicle tool, not part of the manual's routine parking checklist. This answer imports commercial-vehicle and roadside-breakdown gear requirements into a passenger car's routine curb-parking checklist, where no triangle is required.
This question tests your knowledge of Parking in Pennsylvania. Source: Pennsylvania Driver Manual, "Chapter 3, Learning to Drive, Parallel Parking Tips," p.53..
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