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

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

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Automobile Engineering in ME
The auto ignition in a spark ignition engine means

Automatic ignition of the charge at the end of compression
Ignition induced by the passage of a spark
Ignition of the charge before the passage of flame front
Ignition induced to supplement the process of normal combustion

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Automobile Engineering in ME
The purpose of a balancer shaft is to

Reduce vibrations caused by the crankshaft rotation
Balance the timing in the movement of the two groups of pistons
Increase inertia force of the rotating crankshaft
Adjusts the timing of the intake and exhaust valve openings

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