Which of the following jobs must be certified?

The certification of specific jobs within the mining industry is essential due to the safety and technical expertise required for effective performance in these roles. Options that require certification typically involve significant responsibilities that directly impact both workplace safety and operational efficiency.

In the context of the correct answer, roles such as belt examiner, shot firemen, and electrician are critical to mining operations. Belt examiners are responsible for maintaining and inspecting conveyor belts which are crucial for material transport in mines, thus essential for preventing accidents and ensuring efficiency. Shot firemen handle the explosives used in mining operations; their role requires extensive training to avoid hazards associated with handling and detonating explosives. Electricians are vital for maintaining and repairing electrical systems, which ensure that all mining equipment operates safely and effectively. Each of these positions requires specialized knowledge and adherence to strict safety protocols, so certification is essential to ensure that individuals in these roles are qualified and understand the risks involved.

Other job categories, while important, may not always have the same rigorous certification standards due to differences in the nature of their work or the level of risk they pose.