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

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

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Automobile Engineering in ME
The function of positive crankcase ventilation (PCV) system is that it

Mixes fuel with air
Promotes combustion by creating a swirling movement in the air-fuel mixture
Feeds blow by gases to the exhaust manifold
Returns blow by gases from the crankcase to the intake system

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