9–22. Boom stops are designed to prevent 9-27. Before a crane can be put back in the  boom  from  going-over  backwards in  the  event  what  problem  occurs? 1. The boom bounces out of the cradle  during  transport 2. A load line breaks 3. The operator leaves the boom hoist  lever  engaged 4. The operator swings the crane too fast 9-23. What is the function of the master clutch? 1. Provides  the  mechanism  to lift and lower loads 2. Transmits  engine  power  to the  transmission 3. Engages the power from the power  source  to  the  hoist and  swing  mechanisms 4. Rotates  the  house  assembly 9-24. Which of the following types of crane  operations  would  require the use of two hoist drums? 1. Clamshell 2. Dragline 3. Pile  driving 4. All of the above 9-25. What  component  of  a  crane  plays an  important  part  when  changing the length of the boom? 1. The  bridle  assembly 2. The main hoist line 3. The   counterweight 4. The  master  clutch 9-26. When lowering the boom to the ground,  the  boom  point  sheaves should set on a piece of dunnage. 1. True 2. False service,  which  of  the  following instructions  states  the  crane  test director must inspect the crane for correct  installation  of  all components? 1. COMSECOND/COMTHIRDNCBINST 11200.1 2. COMSECOND/COMTHIRDNCBINST 11200.23 3. COMSECOND/COMTHIRDNCBINST 4400.3 4. COMSECOND/COMTHIRDNCBINST 1500.20 9-28. When  telescopic  boom  sections  are extended  unequally,  uneven  stresses are placed on the most retracted section. 1. True 2. False Learning  Objective: Recognize  the components  of  crane  attachments. 9-29. The number of part lines rigged on a hook block is NOT a factor when figuring the capacity of a crane. 1. True 2. False 9-30. In order to operate, which of the following  attachments  requires  the use of a tag line, a holding line, and a closing line? 1. Concrete  bucket 2. Clamshell 3. Dragline 4. Pile hammer 9-31. Which  of  the  following  components helps  prevent  the  clamshell  from twisting  during  clamshell operations? 1. Fairlead 2. Closing  line 3. Tag  line  winder 4. Bridle  assembly 65