5-60. During  routine  destruction of classified material, what is the ultimate goal of the destruction? 5-61. 5-62. 5-63. 1. 2. 3. 4. To clear files of old material so there is more room for new material To  make  reconstruction of the material impossible To  prevent  unauthorized reproduction To destroy the material as quickly as possible What is the most efficient means  of  destroying classified  material? 1. Burning 2. Shredding 3. Jettisoning 4. Pulping Persons  witnessing destruction  of  classified material must have a security clearance of at least what level? 1. Confidential 2. Secret 3. Top Secret 4. The level of the material  being  destroyed When is a record of destruction  required  for Secret  messages? 1. If only one person performs  destruction 2. If the messages have special  markings 3. If the messages have to be  jettisoned 4. During  routine destruction 5-64. Records of destruction of classified  material  must  be maintained  for  what  minimum length of time? 1. 1 yr 2. 2 yr 3. 6 mo 4. 18 mo 5-65. HOW are  burn  bags  accounted for prior to burning? 1. 2. 3. 4. Bags are placed in a secure  place  and inventoried   daily Each bag must be serially  numbered  and  a record kept of all subsequent   handling until  destroyed Each office is responsible  for  its  burn bag until the day of destruction On the day of destruction, each bag is serially  numbered 5-66. What is the maximum allowable size of material shredded by a crosscut shredding  machine? 1. 1/32 inch wide by 1 inch long 2. 1/32 inch wide by 1/2 inch long 3. 3/64 inch wide by 1/2 inch long 4. 3/64 inch wide by 1 inch long 5-67. If classified material must be  jettisoned  during emergency  destruction,  what should be the minimum depth of the water? 1. 500 fathoms 2. 700 fathoms 3. 1,000 fathoms 4. 5,000 fathoms 51