Automobile Engineering in ME
The purpose of a thermostat in an engine cooling system is to

Pressurise the system to raise the boiling point
Prevent the coolant from boiling
Allow the engine to warm up quickly
Indicate the coolant temperature

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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
None of these
All plies run parallel to one another and vertical to tyre bead
Inner tubes are always used

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Automobile Engineering in ME
In a ventilated disc brake

A duct directs air towards the caliper for cooling while the vehicle is moving
Caliper is covered with cooling fins
Disc contains many small holes for optimum cooling performance
Disc contains radial vanes between its rubbing surfaces for optimum cooling performance

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Automobile Engineering in ME
The composition of the electrolyte in a fully charged battery is that

The electrolyte is pure sulphuric acid
The electrolyte is pure distilled water
The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight
The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight

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