Automobile Engineering in ME
The negative terminal post on the top of a battery is

Larger than the positive terminal post
Of the same size as the positive terminal post
None of the listed here
Smaller than the positive terminal post

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Automobile Engineering in ME
The main function of the tread pattern on tyre is that

The crests between the tread grooves absorb road noise
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

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