ICEs generate NOx because oxygen and nitrogen are naturally present in the air that is used for combustion.

• True.
• False.

NOx formation is independent of flame temperature.

• True.
• False.

(Brain Builder) Since NOx is generated by the reaction of O2 and N2 from air, the NOx concentration increases at leaner conditions.

• True.
• False.

Efficient scavenging increases NOx emissions.

• True.
• False.

CIEs cannot be pushed to higher rpm, because they generate excessive NOx at higher rpm.

• True.
• False.

NOx always peaks at the best-performance point in SIEs and CIEs.

• True.
• False.

Supercharging not only enhances SIE and CIE performance but also reduces their NOx emissions.

• True.
• False.

NOx formation is inevitable (حتمي ولا يمكن تفاديه) in SIEs and CIEs.

• True.
• False.

Carbon needs (oxygen + higher flame temperature) to fully oxidize.

• True.
• False.

Higher flame temperature is needed to burn CO.

• True.
• False.