PCI Quality Technician Level 1 Chapter 2 Study Questions and Answers

Forms and abutments for casting of precast concrete products should be monitored for what potential problems? - -Cracked Welds -Bent plates -Offset form joins -Other cracks or damage If stick electrodes get wet, what should be done with them? - Stick electrodes that become wet must be discarded. Electrodes that have been out of their containers may be re-dried once, but electrodes that are wet cannot be redried Architectural concrete finishing areas should include what characteristics? - -Uniform lighting matching daylight -Adequate size for panels -Adequate handling equipment and product dunnage -Proper ventilation and safety equipment -Approved sample fack for comparison of panel finish with sample Prior o stripping a presressed product line, what should be reviewed and done? - -Test compression cylinders to determine whether the required stripping strength has been reached -Hold-down devices should be removed to avoid restraining the product -Side forms should be loosened and/or removed to avoid constraining the products -Any bolts or other devices used to hold embedments to the form or soffit should be removed to avoid binding the products Dunnage oints can create a problem on the contact face. What is that problem and why does it happen? - Dunnage resting against product can create a dark spot if in full contact..This contact holds moisture. Ventilation is required to allow the moisture to escape. Architectural concrete panels have special finishes on their face. What factors affect the color of the face? - -cement type / color -aggegate color, size, and phsical / chemical properties -form material -Mix design -Mixing -Weather Conditions -Water-Cement Ratio -Consolidation -Curing -Finishing techniques -Weather Conditions Quality control personnel do not need to concern themselves with plant safety policies. - False QC should routinely inspect beds for several things. What are they? - -Abutment movement and deformation -Self-stressing form damage -Cracked welds -Bent Plates -Offset form joints -Loose clamps -Other cracks or damage Minimum concrete temp during initial curing should be? - C: 50 degrees F What are the means of accelerated curing - -Steam -Hot-water or oil pipes -Space Heaters