Red Seal Welder Exam (Interprovincial)
A. Common occupational skills: practice questions
Our Red Seal Welder bank has 50 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
OSHA's lens guide suggests shade 10 for SMAW with electrodes up to 5/32 in. Which shade does it suggest for 3/16 to 1/4 in. electrodes?
- Shade 5
- Shade 8
- Shade 12
- Shade 3
Show the answer
C. Shade 12 — The 1910.252 table lists shade 10 for 1/16 to 5/32 in. electrodes, 12 for 3/16 to 1/4 in., and 14 for 5/16 and 3/8 in.
Question 2
In Canada, which organization certifies welding companies and welders to CSA W47.1?
- American Welding Society (AWS)
- Canadian Standards Council of Ministers
- Canadian Welding Bureau (CWB)
- Transport Canada
Show the answer
C. Canadian Welding Bureau (CWB) — CWB (Canadian Welding Bureau) and CSA are on the Red Seal welder acronym list; CWB certifies companies and welders to CSA standards.
Question 3
A cylinder valve is frozen. What may be used to thaw it?
- A torch flame
- Boiling water
- Warm water
- A hammer and wrench
Show the answer
C. Warm water — Fusible plugs can melt below the boiling point of water, so use warm water, never a flame or boiling water.
Question 4
Why must a fall arrest harness be inspected before use?
- To set the welding shade
- To check its electrical rating
- To log the welding time
- Damaged webbing or hardware may fail in a fall
Show the answer
D. Damaged webbing or hardware may fail in a fall — The RSOS lists fall arrest harnesses and anchor points among access equipment welders inspect and use.
Question 5
Which gas cylinder may be 'cracked' to blow dirt from the valve before attaching a regulator?
- Oxygen
- Hydrogen
- Acetylene
- Propane
Show the answer
A. Oxygen — CCOHS: cracking must only be used for oxygen; never crack flammable gas cylinders and never crack hydrogen.