Welder (456A) — Red Seal
601 practice questions
Also known as: 456A.
Practice questions for the Welder (Red Seal) exam, organized by Red Seal Occupational Standard (RSOS) section. 601 questions are available across 4 sections. Written to the Red Seal standard.
These questions follow the 2023 Red Seal Occupational Standard for this trade. The current Red Seal exam is based on the 2014 edition of the standard.
Practice Welder (Red Seal) free →
Sections (RSOS blocks)
| Section | RSOS block | Exam weight | Questions |
|---|---|---|---|
| A | Performs common occupational skills | 16% | 96 |
| B | Performs layout and fabrication of components for welding | 22% | 135 |
| C | Performs cutting and gouging | 18% | 106 |
| D | Performs welding processes | 44% | 264 |
Mock exams are composed to match the official weightings above exactly — the question counts per section don't need to match 1:1.
Practice mock exam
The full practice mock for this trade is 125 questions, a 240-minute time limit, scored against a 70% pass line — the same question style used throughout this bank.
Sample questions
Performs common occupational skills
Before each shift, a hand grinder's guard should be inspected primarily to confirm it does what?
- Deflects sparks and contains a wheel if it shatters
- Increases the rotational speed of the abrasive wheel
- Reduces the amperage drawn by the grinder motor
- Improves the surface finish left by the abrasive
A grinder guard deflects sparks and contains fragments if the wheel shatters, so a cracked or removed guard is unsafe. It does not raise wheel speed, change motor amperage, or improve finish quality. On the job, the welder checks the guard each shift and replaces it before use if it is loose, bent, or missing, because an abrasive wheel can shatter at full speed and throw fragments at the operator and nearby workers.
RSOS 2023 | A-1.01 Maintains hand, power, layout and measuring tools
Performs layout and fabrication of components for welding
Preheating thick carbon steel before welding is done mainly to achieve what?
- Remove the need for any filler metal in the joint
- Raise the carbon content of the base steel plate
- Permanently soften the entire plate being welded
- Slow the cooling rate and reduce cracking risk
Preheat slows the cooling rate, lowering the chance of a hard, crack-prone microstructure. It does not add carbon, permanently soften the plate, or eliminate the need for filler metal. Preheat is most important on thick sections and hardenable steels, and the welder applies it uniformly around the joint and checks it with a pyrometer, because a cold spot can still cool fast enough to crack.
RSOS 2023 | B-8.01 Prepares materials
Performs cutting and gouging
A key advantage of plasma arc cutting over oxy-fuel on stainless steel and aluminum is that plasma can do what?
- Produces an absolutely slag-free and dross-free edge every time
- Operates with no supply of compressed gas or air whatsoever
- Removes any requirement for eye protection while cutting metal
- Cut these non-oxidizing metals that oxy-fuel cannot
Plasma cuts stainless steel and aluminum, which resist the oxidation that oxy-fuel needs. It still requires compressed gas, still demands eye protection, and can still leave some dross. The ability to cut stainless steel and aluminum makes plasma the go-to for non-ferrous and corrosion-resistant work; the welder selects the correct consumables and gas for the metal and thickness to keep the cut clean.
RSOS 2023 | C-11.01 Selects PAC equipment and consumables
Trade Report
Wages by province, real job outlook, the Red Seal path, and exam weightings for Welder (Red Seal) — sourced and dated.