Question 11-49 is to be judged True or False. 11-49.   Personnel  of  the  Engineman  rating  may  be assigned duties on steam-driven ships  to operate diesel-driven electric generating  plants. Learning Objective: Indicate sources of electrical power aboard ship, casualties that may occur, and methods of keeping vital  equipment  in  operation. 11-50.   What must you do if the ship's service generators  fail  during  battle? 1. Ensure  that  the  emergency  system  is rigged  to  supply  power  to  vital auxiliaries 2. Ensure  that  the  emergency  system  is automatically  placed  in  operation 3. Ensure  that  the  casualty  power system  is  automatically  placed  in operation 4. Ensure  that  the  casualty  power system is rigged to supply power to vital  auxiliaries THIS  SPACE  LEFT  BLANK  INTENTIONALLY. In answering questions 11-51 through 11-53, select the action from column B that should be taken  in  the  shipboard  emergency  described  in column  A  to  obtain  power  for  vital  equipment. A. Emergencies 11-51. Failure  of  one ship's  service generating plant 11-52.    Failure  of  both normal  and alternate  power supply 11-53. Failure  of  ship's service  and emergency   circuits B.  Actions 1. Shift  vital equipment  to an  emergency feeder  which receives power  from the  emergency switchboard 2. Rig  temporary 3. circuits  with the casualty power  cables from any live switchboard Transfer  load to  another ship's service generating plant 4. Transfer  the electrical load to an alternate feeder  and source of ship's service power 11-54. A  ship's  casualty  power  system  provides sufficient  power  to 1.    operate  certain  vital  equipment  only 2. permit  the  making  of  temporary repairs  only 3. operate  pumping  equipment  only 4. enable  the  ship  to  operate  at near-normal   efficiency 72