When welding a joint, lay _____ inch tack welds _____ degrees apart, shift it 90 degrees and lay two more 1 inch tack welds 180 degrees apart. {Ans: 1, 180}Hydraulic overspeed valves will stop a downward traveling car if it exceeds speeds rated between _____ and _____ percent. {Ans: 110, 140}A __________ can be caused if the casing is welded crooked or drilling of the hole goes off center. {Ans: dogleg}Residential elevator maximum platform area is _____ sq ft {Ans: 15}A _____ _____ is useful for horizontal (side-to-side) pulling of the truss while being lowered into the wellway. {Ans: lever hoist}Where is the tensioning device located in a belted moving walkway? {Ans: Tail end}