6-59. Shipboard  motor  controllers  are used  for  which  of  the  following purposes? 1. To start and to stop motors 2. To increase or decrease motor speed 3. To reverse the direction of a rotating  shaft 4. Each of the above 6-60. Which of the following pieces of equipment  may  be  equipped  with electric  brakes? 1. Anchor windlasses 2. Auxiliary pumps 3. Switchboards 4. Generators 6-61. When supply voltage has been restored,  what  type  of  motor controller  will  (a)  automatically restart the motor and (b) require manual  startup? 1. (a)  High-voltage  release (b)  low-voltage  protection 2. (a)  High-voltage  release (b)  high-voltage  protection 3. (a)  Low-voltage  release (b)  low-voltage  protection 4. (a)  Low-voltage  release (b)  high-voltage  protection 6-62. You should protect batteries from salt water for which of the following  reasons? 1. To  prevent  release  of  poisonous gases 2. To  prevent  the  battery  from being  ruined 3. Both 1 and 2 above 6-63. In which of the following ways are the  power  and  lighting  distribution systems  different? 1. The  systems  have  different power  sources 2. The  power  distribution  system carries  higher  voltage 3. The  power  distribution  system’s cables  are  more  numerous 4. The  lighting  distribution systems  have  larger  cables 6-64. As  required  by  shipboard  electric safety  programs,  all  personally owned  electrical  equipment  must  be checked  before  being  used  aboard ship. 1. True 2. False 6-65. Before repairs can be made to an electric  motor,  which  of  the following  precautions  must  be  met? 1. The  controller  must  be  tagged out 2. The circuit must be disconnected 3. Both 1 and 2 above 4. The pump end of the motor must be  disconnected 6-66. Heat stress is the body’s inability to  cope  with  a  high-temperature  and high-humidity  environment.  The term “heat stress” is a general term used to describe which of the following  physical  problems? 1. Heat  cramps 2. Heatstroke 3. Heat exhaustion 4. All of the above 6-67. What type of heat stress is life threating? 1. Heat exhaustion 2. Heat  cramps 3.  Heatstroke 6-68. When  administering  first  aid  to  a heatstroke  victim,  what  step  should you take first? 1. Lower the victim’s body temperature 2. Administer  a  salty,  cool  liquid 3. Cover the victim with a blanket and elevate the head 4. Cover the victim with a blanket and elevate the feet 38