4-35. Which   of   the   following   is   NOT  a common   source   of   oil   contamination? 1. Leakage   or   drainage   from equipment   and   systems 2. Misalignment   of   the   lube   oil transfer   system 3. Contaminated   oil   from   purifiers 4. Used   oil   removed   from   equipment during   an   oil   change 4-36. What   instruction   provides   reporting procedures   for   oil   spills   within the   50-mile   prohibited   zone? 1. OPNAVINST   5090.1 2. OPNAVINST 5100.19B 3. OPNAVINST   5100.2B 4. NAVSEAINST 4790.4 4-37. What  publication  contains  a description   and   instructions   for the   oil   spill   containment   and cleanup   kit? 1. NAVSEA    0994-CP-041-7010 2. NSTM   262 3. NAVSEA  0994-LP-013-6010 4. OPNAVINST  5100.1 4-38. The   shipboard   CHT   system   was designed   for   which   of   the   following goals? 1. To  reduce  shipboard  sewage discharge 2. To   prevent   environmental hazards   at   sea 3. To  hold  sewage  generated  over  a 12-hour   period 4. To   comply   with   guidelines identified   in   DOD   directives 4-39. The  Navy  uses  how  many  types  of  CHT systems   on   its   ships? 4-40. What   manual   has   guidelines   for sewage   discharge   procedures   for ships  in  dry  dock? 1. NAVOSH   5100.3 2. N S T M    0 90 3. CHT   Systems   Disposal   Manual 4. N S T M    9 97 4-41. What   is   the   primary   design difference    between    comminutor-type and   strainer-type   CHT   systems? 1. The   number   installed   needed   to accommodate  waste  disposal 2. Capacity 3. Design   features 4. E f f i c i e n cy 4-42. Soil   and   waste   drains   are discharged   overboard   by   what   means? 1. Automatic   CHT   pump   overflow sensors 2. Installed   overflow   check   valves 3. Proper   alignment   of   the diverter   valves 4. Manually 4-43. Vent   pipes   are   installed   on   fuel oil   tanks   for   what   reason? 1. To   provide   early   detection   of f u e l    o i l    s p i l ls 2. To   allow   air   to   escape   or   enter while   filling   or   emptying 3. To   allow   proper   aeration   and prevent   stagnation 4. To   control   free   surface   effect within   the   tank 1. One 2. Two 3. Three 4. Four 29