Which of the following is a directive an inspector can issue?

The option indicating that an inspector can direct a reduction in risk to an acceptable level is correct because it aligns with the fundamental duties and authority of mining inspectors under Queensland mining law. Inspectors are assigned the critical role of ensuring that mining operations comply with safety regulations and standards. Their directives often focus on maintaining the health and safety of workers and minimizing risks to their wellbeing.

By requiring that risks be reduced to an acceptable level, inspectors are acting in accordance with their mandate to enforce safety measures in the mining industry. This directive highlights the inspector's responsibility to assess potential hazards and ensure that operators implement adequate controls to safeguard workers and the surrounding environment.

The other provided options typically fall outside the explicit authority of inspectors. For instance, increasing production levels or changing site management are more operational decisions that are usually left to the mining company's discretion rather than under the direct command of an inspector. Additionally, while scheduling additional safety training is crucial for compliance and may be recommended by inspectors, it is not a formal directive that an inspector can issue in the same manner as mandating risk reduction.