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  Important interview Questions for QA/QC civil engineer.    Q1) How will trucks be checked on site when reciving concrete. Ans- (1) Revolution counter  revolution counter for a concrete mixing truck which selectively records the mixing drum revolutions and also records those revolutions of the concrete mixing drum which occur Within a preset drum speed range. The structural qualities of concrete are affected by too much or too little mixing and, as a consequence, it has become important to determine how many mixing revolutions have taken place between the time that the concrete ingredients are deposited in the mixing drum and the time that the mixed concrete is discharged  from the truck. Additionally, all revolutions of the concrete mixing drum are not mixing revolutions per se. Only those revolutions of the mixing drum which occur within a predetermined range of revolutions per minute are termed mixing revolutions. A generally accepted rate of rotation o...