Which of the following is not an approved fuel for CRJ operations in Canada?

The correct answer reflects that JP-8 is not an approved fuel for CRJ operations in Canada. The CRJ aircraft, including the CRJ 900, is designed to operate on specific types of aviation fuels that meet certain performance and safety standards. In Canada, approved fuels typically include Jet A, Jet A-1, CGSB 3.23, and CGSB 3.24, which are formulated to be compatible with the aircraft's engines and systems.

JP-8, while a jet fuel commonly used by the military, has different specifications and additives that may not align with the CRJ 900's operational requirements. This can potentially lead to performance issues or safety concerns, which is why it's not included as an approved fuel for its operations in Canada. Understanding these limitations regarding fuel types is crucial for safe aircraft operation and compliance with regulatory standards.