For which of the following scenarios are 4.0 demerits applicable?

The scenario where 4.0 demerits are applicable involves failing both the first physical training evaluation (PT eval) and the Candidate Physical Ability Test (CPAT). This is significant because both assessments are critical measures of a recruit's physical readiness and ability to perform the essential functions required in firefighting roles.

Failing the first PT eval indicates that the recruit did not meet the minimum standards for physical fitness at an early evaluation stage. The CPAT is also a required test that assesses a recruit's physical abilities in scenarios that simulate actual firefighting tasks. Failing both tests demonstrates a consistent inability to meet the physical demands expected of recruits. Therefore, the penalty of 4.0 demerits reflects the gravity of failing both important evaluations, which are crucial for ensuring candidates can handle the physicality of the job.

When assessing other scenarios, failing the CPAT alone or only one PT eval does not warrant the same penalty level, as they do not indicate a combined inability to meet physical standards. Failing a performance objective test alone also pertains to specific job skills rather than overall physical capability, hence not attracting the same penalty as failing both physical evaluations.