A spark plug (sometimes, in British English, a sparking plug,[1] and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.
Top 10 amazing movie makeup transformations. A concrete finisherâs main job is to smooth concrete as soon as itâs been poured to ensure that it dries evenly and to make sure that the project as a whole achieves consistent results when it comes to final texture, thickness, and density.
Salary Outlook. Cement masons and concrete finishers earned a median of $36,130 in 2013, or $17.37 an hour, according to the BLS. The best-paid earned $65,680, while the lowest-paid earned $24,020.