clearance volume
cylinder volume
exhaust volume
none of these
petrol vapours
water vapours
carbon monoxide
all of these
The exhaust gas from petrol engine contains * petrol vapours * water vapours * carbon monoxide
oxidation
octane number
Volatility
high octane petrol
low octane petrol
unleaded petrol
blended fuel
spill cut off
delay period
injection period
ignition period