1-30. The rope in a block and tackle is called a 1–26. The  mechanical  advantage  of  the lever pictured in figure 1J is 1. five 2. six 3. seven 4. one–sixth 1–27. The  combination  dog  and  wedge  of textbook figure 1-10 is a complex machine  since  it  consists  of  which two  simple  machines? 1. Lever and the screw 2. Two  first–class  levers 3. Lever and the inclined plane 4. One  first-class  lever  and  one second-class  lever Information  for  questions  1-28  and $ 1-29: The handle of a hatch dog is 9 inches long. The short arm is 3 inches long. 1-28. What  is  the  mechanical  advantage  of the hatch dog? 1. 12 2. 27 3. 3 4. 9 1–29. With how much force must you push down on the handle to exert 210 pounds force on the end of the short  arm? 1. 105 lb 2. 80 lb 3. 70 lb 4. 25 lb 1. runner 2. line 3. fall 4. sheave 1-31. The  theoretical  mechanical advantage  of  the  single  sheave block of textbook figure 2-2 is 1. one 2. two 3. one-half 4. zero 1-32. A  single  block-and-fall  rigged  as  a runner  has  a  theoretical  mechanical advantage  of 1. one 2. two 3. one–half 4. four 1-33. In a block and tackle having a mechanical  advantage  greater  than one, how does the distance the load moves compare with the length of the rope which is pulled through the  block? 1. It is less 2. It is the same 3. It is greater 4. It depends on the weight of the load 1-34. What  advantage  can  you  obtain  by replacing  the  single  fixed  block  of textbook figure 2-3 with the gun tackle  purchase  of  textbook  figure 2-6? 1. You can pull the rope from a more  convenient  position 2. You need to exert about 1/3 as much effort to lift the same load 3. You can lift the same load in 1/2 the time 4. You need to exert about 1/2 as much effort to lift the same load 5