6-38. 6-39. 6-40. 6-41. 6-42. 6-43. For what purpose are inserts placed in the tilt-up panels? 1. For  vertical  support 2. For picking up or tilting 3. For  extra  reinforcement 4. For  horizontal  support In a tilt-up panel, the inserts are installed  in  what  manner? 1. Independent  of  the  reinforcement 2. Tied  to  reinforcement 3. Welded  to  reinforcement 4. Tied to the panel forms What is the strongest method of connecting  panels  together? 1. A butted connection using grout or  gasket 2. A cast-in-place column with the panel-reinforcing steel tied into  the  column 3. Steel  columns  welded  to  steel angles or plates secured in the panel 4. Precast  columns  tied  with  the panel To  provide  waterproofing  in  all panel joints,    you should use what material? 1. Heavy plastic film 2. Heavy asphalt-laminated barriers 3. Polyethylene  (6-mil) 4. Expansion  joint What is the purpose of contraction joints? 1. To prevent buckling due to expansion  of  the  reinforcing steel  caused  by  temperature changes 2. To prevent cracking due to shrinkage of the reinforcing steel 3. To  prevent  cracking  due  to shrinkage  caused  by  temperature changes 4. To  prevent  buckling  due  to expansion  of  the  concrete  caused by  temperature  changes Expansion  joints  are  also  known  as what kind of joints? 1. Construction 2. Shrinkage 3. Contraction 4. Isolation 6-44. 6-45. 6-46. 6-47. Placing  plastic  concrete  into  spaces enclosed by forms is referred to by what term? 1. Casting 2. Precasting 3. Molding 4. Premolding The part of a wall form that shapes and  retains  the  concrete  until  it sets is known by what term? 1. Brace 2. Wale 3. stud 4. Sheathing In  formwork,   what devices are usually  used  to  reinforce  wall  forms against  concrete  displacement? 1. Sheathing 2. Wales 3. Ties 4. Spreaders Which of the followinq devices combines  the  functions  of  wire  ties and  wooden  spreaders? 1. Tie  holder 2. Snap tie 3. Tie  spreader 4. Bar tie 6-48. What  type  of  wall-form  tie  consists of an inner section and two threaded outer  sections? 1. Snap tie 2. Bar tie 3. Tie rod 4. Tie  spreader 6-49. For  concrete  column  forms,  (a)  what is the name of the members that brace against bursting pressure, and (b) where is the bursting pressure greatest? 1. (a)  Ties (b)  middle 2. (a) Yokes  (b) top 3. (a) Yokes (b) bottom 4. (a) Ties   (b) top 6-50. In  masonry  construction,  what  is  the most  common  concrete  masonry  unit used? 1. Concrete  block 2. Clay tile 3. Stone 4. Brick 40