4-51. 4-52. 4-53. 4-54. 4-55. 4-56. A sling should be maintained on the crane at the end of each workday. 1. True 2. False Which of the following number of designators  does  NOT  identify  an NCF TOA slings and rigging gear kit? 1. 80104 2. 84003 3. 84004 4. 80056 To avoid confusion and doubt, you may downgrade a sling to a lower capacity. 1. True 2. False What kit in the NCF TOA contains the tools and equipment necessary to  fabricate  3/8-inch  through 5/8-inch  sizes  of  wire  rope  slings? 1. 80104 2. 80107 3. 80092 4. 84004 At what periodic intervals should a  visual  inspection  of  all  wire rope slings and rigging gear be performed? 1. Every 30 days 2. Every 60 days 3. Every  75  days 4. Every 90 days The  recommended  COMSECOND/ COMTHIRDNCBINST wire rope lubricant is composed of what mixture? 1. 70% diesel to 30% used oil 2. 70% diesel to 30% new oil 3. 70% new oil to 30% gas 4. 70% new oil to 30% diesel 4-57. What action is required when rigging  gear  becomes  defective? 1. Downgrade the capacity 2. Survey it through supply 3. Destroy it by cutting it up 4. Store it in the rigging loft Learning  Objective:  Recognize the  responsibilities  of  the  pro- ject  supervisor  and  the  concepts of construction used in an NMCB. 4-58. In an NMCB, what person has direct responsibility  for  the  successful completion  of  all  construction projects? 1. Commanding officer 2. Operations officer 3. Operations chief 4. Project supervisor 4-59. In an NMCB, what officer has the direct  supervisory  authority  over the  utilization  of  the  battalion’s construction   resources? 1. Executive officer 2. Supply officer 3. Embarkation officer 4. Operations officer 4-60. Within the Alfa company organization,  what  person  is responsible to A-6 for all prime  and  sub  projects? 1.  A-5 2.   A-4 3.   A-3 4. A-32 4-61. In an NMCB, what person appoints project  supervisors  for  assigned construction   projects? 1. Company commander 2. Operations officer 3. Operations  chief 4. Projects  chief 30