4-40. What is the most critical portion of the operation of a crane? 1. Moving the crane 2. Setting up for a lift 3. Rotating the crane 4. Rigging for a lift 4-41. The  rated  capacities  of  mobile cranes  are  based  on  what  factors? 1. Strength and sensibility 2. Strength and mobility 3. Strength and desirability 4. Strength and stability 4-42. In an NMCB, which of the following personnel is NOT required to attend the  biweekly  crane  operation  and safety  meetings? 1. Alfa company commander 2. Crane test director 3. Battalion safety chief 4. Crane supervisor and operator Learning  Objective:  Recognize the NCF wire rope sling and rigging  hardware  program. 4-43. What person is responsible for the turnover  of  all  slings  and  rigging hardware  during  the  BEEP? 1. Crane test operator 2. Crane certifying officer 3. Crane crew rigger 4. Crane crew supervisor 4-44. The factor of safety for wire rope slings is what ratio? 1. 5.0 to 1 2. 3.5 to 1 3. 3.0 to 1 4. 4.0 to 1 4-45. The total weight of a load carried by a single-leg sling at 90 degrees is what type of sling? 4-46. The sling angle for a two-leg sling is at 30 degrees hoisting a 1,000- pound object. What total stress weight  is  each  leg  hoisting? 1. 500  pounds 2. 750  pounds 3. 1,000  pounds 4. 1,500  pounds 4-47. If a thimble is not used in an eye of a wire rope, what percentage of efficiency of the connection is lost? 1. 5% 2. 10% 3. 15% 4. 20% 4-48. When properly fabricated, which of the  following  eye  splices  develops almost  100  percent  of  the  catalogue breaking  strength  of  the  wire  rope? 1. Flemish eye and serving 2. Flemish eye and pressed metal sleeve 3. Tucked  eye  and  serving 4. Fold back eye and pressed metal  sleeve 4-49. It is highly recommended that what eye splice never be used for overhead  hoisting  operations? 1. Flemish eye and serving 2. Tucked eye and serving 3. Fold back eye and pressed metal sleeve 4. Tucked eye and pressed metal  sleeve 4-50. What person is responsible for establishing and maintaining a card file  system  containing  records  of each  sling  in  the  unit’s  inventory? 1. Crane test director 2. Crane crew rigger 3. Crane crew mechanic 4. Crane crew supervisor 1. Bridle hitch 2. Choker hitch 3. Double-vertical hitch 4. Single-vertical hitch 29