5-19. After  all  ingredients  for  plaster have been added, what minimum time should a mixing machine be allowed to mix? 1. 7 min 2. 5 min 3. 3 min 4. 10  min 5-20. Normally,  what  is  the  specified flatness  tolerance  of  a  plastered surface? 1. 1/16 in. in 4 ft 2. 1/8 in. in 10 ft 3. 1/4  in.  in  8  ft 4. 1/2 in. in 16 ft 5-21. What tool is used for carrying mortar? 1. A  rectangular  trowel 2. A darby 3. An angle trowel 4. A hawk 5-22. To  improve  adhesive  bonds,  what tool should be used to make furrows between  coats? 1. Darby 2. Browning  brush 3. Cork  float 4. Scarifier 5-23. On a typical plastering crew, which of  the  following  individuals normally  mixes  the  plaster? 1. Crew leader 2. Tender 3. Plasterer 4. Supervisor 5-24. 5-25. 5–26. Which  of  the  following  statements is applicable to the fog-spray curing  of  portland  cement  plaster? 1. The finish coat should be applied at least 3 days after the brown coat is applied 2. The finish coat should be spray-cured for 48 hours after its  application 3. The brown coat should be fog-sprayed for 48 hours followed  by  the  same  treatment for the scratch coat 4. The scratch coat should be fog-sprayed for 24 hours and the brown coat fog-sprayed for 36 hours A putty coat plaster finish is ready for troweling at what point? 1. When the angles have been straightened 2. When the surface has been doubled back 3. When the skim coat has been applied 4. When the plaster begins to set and the surface becomes dull Throwing plaster on a surface with a brush produces which of the following  textures? 1. Stippled 2. Travertine 3. Dash coat 4. Pebble 28