Automobile Engineering in ME
A three way catalytic converter

Reduces N₂, H₂O, and CO₂ emission levels
Re-circulates exhaust gases
Removes CO, HC, and NO₂ from the exhaust gases passing through it
Burns fuel vapour gases

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Automobile Engineering in ME
The compression ratio in petrol engine is kept less than in Diesel engine because

Less compression ratio gives better performance
It is just customary to have less compression ratio in petrol engines
It makes petrol engines lighter
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

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Automobile Engineering in ME
Which one of the following statement correctly describes the construction of a bevel gear type differential?

The drive shafts are splined to the differential carrier.
The left side gear and the differential carrier rotate in constant unison.
The differential carrier houses differential pinion gears and side gears.
The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

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