Automobile Engineering in ME
In which of the following conditions, the idle CO percentage should be measured with the vehicle?

Headlights are switched on
Headlights and other electrical devices are switched on
Headlights and other electrical devices are switched off
Headlights and other lights are switched off

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Automobile Engineering in ME
The function of a first compression ring (top ring) is that it

Creates swirl
Increases the combustion temperature
Maintains a seal and prevents the fuel leakage
Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber

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