Automobile Engineering in ME
The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

Valve timing diagram
Indicator diagram
None of these
Axial force diagram

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

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