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Section 2 CONCRETE
23. Why should wood and metal shores posts never be used together under the formwork for a suspended slab? A. Wood shores can never be wedged to the same snugness as metal. B. Metal shores must be laced but wood shores do not require lacing. C. Wood and metal react differently to loading so therefore a failure could occur. D. Metal posts have more reusability so they should be used for cost and efficiency. 24. What procedure should be done when lowering a fly form and moving it out from a suspended slab? A. Reshore immediately in specified locations and then position fly form above. B. Shore immediately in specified locations and then position fly form above. C. Pull the fly forms horizontally with the crane so that reshoring can occur sooner. D. Reshoring occurs simultaneously with the placing of the fly form above. 25. When constructing a matt footing, the outside forms are built with the loose forming method of snap ties, wedges, studs, and double walers. How are the inside of the ties held together? A. Snap ties, wedges, studs, and double walers. B. Snap ties welded to the reinforcing steel. C. Snap ties and wedges at the bottom and spandrel ties at the top. D. Snap ties with a special attachment clip that connects to the reinforcing steel. 26. When an excavation has been dug 50 mm (2") too deep, what procedure should be used to set the footing elevation? A. Drop the forms for the footings two inches also so extra concrete is not required. B. Set the forms to required height and fill the bottom of them with dirt so extra concrete is not required. C. Set the forms to the proper height and pour them full even though extra concrete is required. D. Over excavation now must take place to ten inches minimum so that extra thickness in footing can carry extra loading. 27. What should be installed to protect the butt of a wood pile brooming during the driving procedure? A. Pile shoe. B. Rubber cap. C. Metal point. D. Pile ring. 28. What procedure is used when installing corners for formwork? A. Plumb in both directions and brace them immediately. B. Plumb in one direction only and brace because the form will be pulled to plumb in the other direction when straightening walls. C. Do not be concerned with plumbing of corners until entire wall forms are set. D. Get close to plumb in both directions and then fine tune them after all wall forms are set. 29. In the snap tie system of forming, the wedges should be placed at a slight angle to increase their bearing on the structural forming members. What else should be done? A. The wedges should be hammered as tight as possible and tacked with two duplex nails to prevent dislodging. B. They should be nailed with two duplex nails and the large hole up to prevent dislodging and make stripping easier. C. They should be nailed with two duplex nails and the large hole down to prevent dislodging and make stripping easier. D. They should be hammered snug and tacked with two duplex nails to prevent dislodging. 30. When setting up shoring for a suspended slab, what mathematical processes must occur so that slab is poured at correct height? A. Height of shore plus depth of joist plus thickness of formply equals bottom of pour. B. Height of shore plus depth of joist plus thickness of formply plus thickness of slab equals top of pour. C. Height of shore plus depth of stringer plus depth of joist plus thickness of formply plus thickness of slab equals top of pour. D. Height of shore plus depth of stringer plus depth of joist plus thickness of formply equals top of pour. 31. When forming a construction joint for a suspended slab pour, what procedure should be used to allow for the easiest stripping without bending rebar? A. Rows of solid forming material directly above and below bars can be long pieces. B. All rows of solid forming material should be short pieces. C. All rows of solid forming material except the kicker row should be short pieces. D. All rows of solid forming material below the top mat of steel should be short pieces 32. What should be done when forming in order to prevent discoloring of concrete at column corners? A. Install chamfer strips in the form corners. B. Ensure tight fitting column corners. C. Make sure corners have extra release agent. D. Install a cove strip in the form corners. 33. When installing column forms, where should the column be pour too for a future flat slab? A. Be set at underside of dropped panel. B. Be set at underside of slab. C. Be set at the underside of the column capital. D. Be set at underside of concrete beam. 34. When pouring a concrete stair, how can the riser face be repositioned if lateral deflections have taken place? A. By adding some water to the concrete and continuing to pour at a slower rate. B. By repositioning the ends of the riser stock to align with the bowed section. C. By using an inverted stringer, wedging the riser stock slightly back beyond straightness and then continuing to pour. D. By removing the concrete to allow the form to spring back into place, then replacing the concrete a little at a time. |