040307
Practice
Mock
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Body & Trim
Body panels, glass, interior, ADAS awareness.
Q 1 / 50
body-trim
L1
Why is a winter-grade screen wash formulated with an alcohol such as methanol or isopropanol rather than plain water in the United Kingdom?
A
Because the alcohol in the screen wash makes the wiper blade rubber last noticeably longer in service, doubling the practical life of a set of blades over the course of an average winter on a typical UK light vehicle
B
Because the alcohol in the screen wash gives the windscreen a glossy finish after each use that helps the wipers glide smoothly across the glass, particularly on long motorway journeys throughout the colder months of winter
C
Because the alcohol depresses the freezing point of the mixture so the washer fluid does not freeze in the bottle, lines or jets at typical UK winter temperatures
D
Because the alcohol in the screen wash has been shown to improve the audio quality from the door speakers when winter wash is used, removing the muffling effect that plain water in the wash bottle has on the speakers
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