6-51. When nothing is known of the water resources in a particular area, the  existence  of  water-producing formations  can  be  verified  by which  of  the  following  means? 1. Exploratory   drilling 2. Inspecting outcrops of rock formations 3. Studying  maps  and  documents 4. Each of the above 6-52. A “drilled” well is normally drilled to a depth of what number of feet? 1. 1,000 2. 1,500 3. 2,000 4. 2,500 Learning  Objective:  Recognize the operation of rotary drilling. 6-53. What type of drilling method is used in areas where ground formations  are  loose  and unconsolidated? 1. Mud  drilling 2. Air drilling 3. Down-hole-drilling 4. Percussion   drilling 6-54. During  rotary  drilling,  a  rapid yet  smooth  penetration  of  the drill bit is an indication that the bit is entering a 1. bed of gravel 2. formation  of  fine  sand 3. clay  formation 4. consolidated   formation 6-55. Of  the  crew  members  operating  the rotary  well-drilling  rig,  who  has the  responsibility  for  carrying out  the  overall  drilling  program? 6-56. Personnel  engaged  in  well-drilling operations  should  observe  which  of the  following  safety  measures? 1. Wear  tight  fitting  clothes while  working  around  moving machinery 2. Wear gloves when handling wire rope or metal parts 3. Wear  safety  shoes  and  hard hats 4. All of the above 6-57. Which  component  of  a  kelly-drive rotary  well-drilling  rig  is connected to the top joint of the drill  pipe? 1. The  hoisting  plug 2. The kelly 3. The  water  swivel 4. The drill collar 6-58. Which  of  the  following  components of the kelly-drive rotary well-drilling  rig  controls  the rate of feed to the drilling bit? 1. The kelly drum brake 2. The hoist drum 3. The drill collar 4. The  rotating  table 6-59. On the kelly-drive rotary well-drilling  rig,  what  accessory holds  the  drill  pipe  securely during joint addition or removal? 1. The  drill  collar 2. The  hoisting  plug 3. The set of slips 4. The kelly sub 1. The  project  supervisor 2. The  tool  pusher 3. The  driller 4. The  derrick  hand 46