What is the consequence of not displaying an Engineer's certification card on request?

Not displaying an Engineer's certification card upon request can lead to serious consequences, primarily because having the certification is a crucial aspect of ensuring safety and compliance within the railroad industry. The certification card serves as proof that the engineer is qualified and authorized to perform their duties, and failure to present it when requested could signal a lack of adherence to protocols intended to maintain safe operations.

Consequently, one potential outcome of not providing this documentation is the possibility of losing one's job. Employers require verification of qualifications to maintain safety and operational standards. If an engineer cannot provide their certification, it raises concerns about their legitimacy and professional standing, potentially resulting in disciplinary action, including termination.

The other options do not adequately reflect the severity of the situation. While additional training might be recommended in certain contexts, it would not be the immediate consequence of failing to display the card; nor is it optional to carry the card for verification. Similarly, while written explanations might occasionally be requested, the immediate and most impactful result of failing to present the certification card would likely be job loss, underscoring the critical nature of compliance in this industry.