Right

Wrong

lean

rich

chemically correct

none of these

U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%

U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%

U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%

U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%

chemically correct air-fuel ratio by weight

chemically correct air-fuel ratio by volume

actual air-fuel ratio for maximum efficiency

none of these

Benzene

Iso-octane

Normal heptane

Alcohol