6-13. When a reinforcing bar is bent too sharply,  what  might  occur? 1. The bar would crack or be weakened 2. The bar will not adhere to the concrete 3. Concrete strength would be reduced 4. Hydration would not occur 6-14. When not dimensioned on the drawings, what is the minimum length of a lap splice for (a) No. 3 bars and (b) No. 6 bars? 1. (a) 11.25 in (b) 22.50 in 2. (a) 12.00 in (b) 22.50 in 3. (a) 22.50 in (b) 12.00 in 4. (a) 22.50 in (b) 11.25 in 6-15. What pattern sizes are available in 6-16. 6-17. square  pattern  welded-wire  fabric? 1. 1 by 1 in,    2 by 2 in, and 3 by 3 in 2. 2 by 2 in, 3 by 3 in, 4 by 4 in, and 5 by 5 in 3. 2 by 2 in, 3 by 3 in, 4 by 4 in, and 6 by 6 in 4. 3 by 3 in, 5 by 5 in, and 6 by 6 in When concrete structural members are fabricated at locations other than the final position of use, they are known by what term? 1. preconstructed 2. Cast-in-place 3. Prefabricated 4. Precast What term is concrete cast in its final position of use known by? 1. Preconstructed 2. Cast-in-place 3. Prefabricated 4. Precast IN  ANSWERING  QUESTIONS  6-18  THROUGH  6-21, SELECT THE PRECAST STRUCTURAL MEMBER FROM THE FOLLOWING LIST WHICH BEST FITS THE USE DESCRIBED. A. FLOOR OR ROOF DECK B. DECK PANEL FOR A LARGE PIER c. INSULATED  EXTERIOR  WALL 6-18. Tongue-and-groove  panel. 1.   A 2.   B 3.   C 6-19. 6-20. 6-21. 6-22. 6-23. 6-24. 6-25. 6-26. Sandwich panel. 1.   A 2.   B 3.   C Double-T slab. 1.   A 2.   B 3.   C Channel slab. 1.   A 2.   B 3.   C What terms correctly refer to the small, closely spaced beams used in (a) floor and (b) roof construction? 1. (a) Joists (b) purlins 2. (a)  Joists (b)  joists 3. (a) Purlins (b) purlins 4. (a) Purlins (b) joists What  primary  difference,  if  any, exists between the beams and girders? 1. Beams are shorter than girders 2. Beams are used for different purposes than girders 3. Beams  are  made  of  different material than girders 4. Nothing; they are the same Unless the ends of beams are rectangular,    most of them will be of what cross-sectional shape? 1. Single T 2. Double  T 3.   I 4.   C In  hollow  precast  columns,  what material is put in the core to help hold  the  column  upright? 1. Concrete 2. Looped  rod 3. Grout 4. Heavy cardboard Of  the  following  advantages  of precasting identical concrete members, which is considered to be the  most  important? 1. Less  required  storage  space 2. Faster  erection  time 3. Reusable  forms 4. Quality-controlled   concrete 38