Automobile Engineering in ME
The problems caused by the wheel imbalance are

Poor acceleration and hard steering
Poor acceleration and reduced fuel efficiency
Hard steering and hard ride
Steering wheel vibrations and uneven tyre wear

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Automobile Engineering in ME
The difference between DOT 3 and DOT 4 brake fluids is

DOT 4 fluids have a higher boiling point than DOT 3 fluid
DOT 4 fluid is more resistant to freezing than DOT 3 fluid
DOT 4 fluids have a lower boiling point than DOT 3 fluid
DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life

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