Which of the following is unlikely to be a hazard of confined spaces?

Confined spaces can present a variety of hazards, and it's important to understand the context of these environments. While electrocution can occur in many areas where electrical equipment is present, it is less likely to be a hazard specific to confined spaces when compared to other hazards such as oxygen deficiency, chemical exposure, and engulfment.

Oxygen deficiency is a critical concern in confined spaces, particularly if the space is poorly ventilated or contains materials that can displace oxygen. Likewise, chemical exposure is a significant risk if there are toxic or hazardous materials present. Engulfment can occur in spaces where loose materials are present, leading to situations where a worker might be trapped or buried.

In the context of confined spaces, electrocution is unlikely to be a direct hazard compared to these other more prominent risks, which is why it is the correct answer in identifying the lesser concern in this specific scenario.