421A Heavy Duty Equipment Technician — Full-Length Mock Exam (135 Questions)

Format: 135 multiple-choice questions (1 correct + 3 distractors) · Time target: 4 hours · Passing benchmark: ≥70%

Rationales:

Provided EN/FR after each question.References: Aligned to RSOS HDET (2023) Major Work Activities (MWA).

Provincial/Ontario 421A practice expectations layered where applicable (safety, documentation, air brake service norms).

How to use: Answer all questions first.

Then mark using the answer key after each question or hide rationales if printing.

Use the Scoring & Analytics worksheet at the end to map results by RSOS block.

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