black smoke

Combustion's murky exhaust

Black smoke is dark-colored smoke, typically indicating incomplete combustion or burning material rich in carbon—rubber, oil, or plastic.

Firefighters and mechanics read smoke color diagnostically: black smoke from an exhaust suggests engine problems.

In Vatican tradition, black smoke from the Sistine Chapel chimney signals that cardinals have not yet elected a new pope.

Related

chimney · fire · house fire · oil fire · diesel · plume · ash · charred · burning · smoldering · haze · dark cloud · dark · choking · acrid · signals · papal conclave · engine

Categories
Opposites
visual appearance/color

black smokewhite smoke

Vatican election success indicator

zero emissions · fresh air · pure air · clean air · colorless gas

combustion quality/cleanliness

black smokewhite smoke

Vatican election success indicator

zero emissions · clean air · water vapor

Family

black, smoke, blacks, blacker, blackest, blacken, blackened, blackening, blackish

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G