Thread:PikovajaDama/@comment-1217267-20151106194530/@comment-16533050-20151106202141

Also, the term 'exhaust' is rather a broad term.

In it's most basic form, it means the expelled gasses/waste from an engine, which is not visible in the pic. If a change is to be made, it should probably be more specific, such as 'the exhaust stack'.

Edit: And during this time period, they were referred to as 'smokestacks' not exhaust, or even 'exhaust stacks'.