Year 2 Exam Study Guide — master what the exam actually tests, concept by concept.
Mechanical trades involve high pressures, extreme temperatures, rotating machinery, and chemical hazards. The exam tests whether you can identify risks before they become incidents — covering everything from confined space entry to pressure testing safety.
Center drill: creates conical indentation for live center or next drill size. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Boring bar: extends into hole; minimize overhang for accuracy. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Case hardening: carbon/nitrogen diffusion into surface; wear-resistant case with tough core. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Mechanical work is governed by a stack of codes: plumbing codes, gas codes, pressure vessel codes, ASHRAE standards, and provincial regulations. Exam questions test your ability to apply these standards to real scenarios — knowing when a rule applies, what the limit is, and why it exists.
Multi-start: lead = pitch × number of starts; faster action (e.g., 4-start = 4× pitch). Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
lead = pitch × number of starts
Mechanical systems live and die by numbers — the wrong pipe size creates pressure loss, the wrong refrigerant charge affects efficiency, the wrong gas orifice is a hazard. These calculations aren't abstract math; they're engineering decisions made in the field every day.
Thread lead: spindle speed/feed ratio must match thread pitch; tool angle critical. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Speed = surface feet / minute ÷ (π × diameter); higher for carbide, smaller diameter. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
Speed = surface feet / minute ÷ (π × diameter)
Pipes, valves, fittings, and mechanical components have ratings, classifications, and compatibility requirements. Using the wrong material can fail an inspection, void a warranty, or create a dangerous condition. This section covers proper material selection and equipment knowledge.
Offset = (taper angle / 2) × length; machine measures from center line. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
Offset = (taper angle / 2) × length
Face mill: multiple inserts on rotating tool; surfaces face perpendicular to spindle. Material selection directly affects performance, code compliance, and longevity. Using the wrong type can fail an inspection or create a hazard down the line.
Peripheral milling: slot, profile, teeth on cylindrical cutter side. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Annealing: heat ~Ac3, soak, slow cool in furnace; relieves stress, improves machinability. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Tempering: reheating below Ac1 (~400°F) relieves brittleness while maintaining hardness. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Cutting tools: HSS (600 sfm), carbide (3000+ sfm), ceramic (high-speed), CBN (super-hard). Material selection directly affects performance, code compliance, and longevity. Using the wrong type can fail an inspection or create a hazard down the line.
Procedure matters in mechanical work. The order of operations, the proper testing sequence, the way you commission a system — doing it right the first time means no leaks, no callbacks, and no danger. This section covers procedures as they appear on the exam and as they're done on the job.
Compound angle = taper angle / 2 for symmetric feed; requires lathe stop at full depth. Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
Compound angle = taper angle / 2 for symmetric feed
Rockwell: dial reading (C scale typical); Brinell: microscope measurement; Vickers: both scales. On the job, a solid grasp of this concept means faster decisions, fewer errors, and work that passes inspection the first time.
Hardening: austenite forms, rapid cool traps carbon = martensite (hard, brittle). Memorize this formula and practise substituting values — exam questions often give you three variables and ask you to solve for the fourth.
rapid cool traps carbon = martensite (hard, brittle)
All 15 exam concepts from this guide — test your recall before you sit the exam.