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

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 4 fluids have a higher 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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Automobile Engineering in ME
In radial tyres

One ply layer runs diagonally one way and another layer runs diagonally the other way
Inner tubes are always used
None of these
All plies run parallel to one another and vertical to tyre bead

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Automobile Engineering in ME
The function of anti-lock brake system (ABS) is that is

Minimizes the brake fade
Reduces the stopping distance
Prevents nose dives during braking and thereby postpones locking of the wheels
Maintains directional control during braking by preventing the wheels from locking

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