61. Which of the following are required on roof bolting machines used in seam heights 48 inches or higher?

62. What must be maintained on all self-propelled section equipment to assist equipment operators in making the required preshift inspections of such equipment for safety defects and/or unsafe conditions?

63. Who is required to examine the roadway to be traveled prior to operating section haulage equipment?

64. How many open, unsupported adjacent crosscuts are permitted in direct line with one another on remote controlled deep cut mining sections?

65. How often must each coal operator or independent contractor submit to the director a report containing the findings of the required evaluation of the effectiveness of the comprehensive mine safety program in effect at his or her operation?

66. How far from the working faces must boxes or magazines of explosives or detonators be kept?

67. What distance from mine openings, occupied buildings, and public roads must surface blasting magazines be located (unless barricaded)?

68. Within what distance of a check curtain or fly curtain must mining equipment not be parked?

69. How many oxygen and acetylene cylinders or tanks are permitted underground at any one time?

70. When is a mine foreman - fireboss required to be employed at an underground mine?