CWB LEVEL 1 EXAM STUDY GUIDE 2026 FULL
QUESTIONS WITH ANSWERS
CWB Level 1 (Fundamentals) Exam Study Guide 2026: 100 Q&A
Section A: Safety (15 Questions)
1. Q: What is the primary purpose of a Material Safety Data Sheet (MSDS/SDS)?
A: To provide detailed information on the properties, hazards, safe use, storage, and
emergency measures for a controlled product.
2. Q: What type of fire extinguisher is suitable for electrical fires?
A: Class C fire extinguisher (CO2 or dry chemical).
3. Q: What is the most significant health risk associated with welding galvanized steel?
A: Metal fume fever, caused by inhaling zinc oxide fumes.
4. Q: What PPE (Personal Protective Equipment) is essential for head protection in
welding?
A: A welding helmet with the proper shade lens, and sometimes a fire-resistant skull cap
underneath.
5. Q: Why must cylinders be secured in an upright position?
A: To prevent them from falling and damaging the valve, which could turn the cylinder
into a dangerous projectile.
6. Q: What does WHMIS stand for?
A: Workplace Hazardous Materials Information System.
7. Q: What is the danger of using oxygen to blow dust off clothing or equipment?
A: Oxygen saturation can make materials highly flammable, leading to a severe fire risk.
8. Q: What should you do if you hear a hissing sound from a gas cylinder?
A: Evacuate the area if it's a major leak, and inform the supervisor/gas monitor
immediately. Do not attempt to fix it yourself unless trained.
9. Q: What is arc flash, and what are its effects?
A: A burn to the skin and eyes caused by ultraviolet and infrared radiation from the
welding arc. Effects include sunburn-like skin damage and "welder's flash"
(photokeratitis) in the eyes.
, 10. Q: What is a confined space, and why is it dangerous for welders?
A: An enclosed or partially enclosed space not designed for continuous occupancy.
Dangers include toxic fume accumulation, oxygen deficiency, and entrapment.
11. Q: What is the purpose of ventilation in a welding shop?
A: To remove harmful welding fumes, gases, and dust from the welder's breathing zone
and the general work area.
12. Q: What should you check on a grinding wheel before use?
A: The ring test for cracks, proper guarding, and that the wheel speed (RPM) matches
the grinder's rating.
13. Q: What is the primary hazard of carbon monoxide (CO) in welding?
A: It is a colorless, odorless gas that displaces oxygen in the blood, causing asphyxiation,
headaches, dizziness, and death.
14. Q: Why must fuel gas cylinders (e.g., acetylene, propane) never be used on their side?
A: Acetylene is dissolved in acetone, and tipping can allow the solvent to be drawn into
the hose and torch, causing a dangerous flare-up or explosion.
15. Q: What is the correct first aid for a thermal burn?
A: Cool the burn with cool, clean running water for at least 10-20 minutes. Cover with a
sterile, non-stick dressing. Seek medical attention for serious burns.
Section B: Drawing & Symbols (15 Questions)
16. Q: What does a welding symbol consist of?
A: A reference line, arrow, and tail, with supplementary symbols, dimensions, and
specifications placed around it.
17. Q: Where is the weld specification (e.g., process, electrode) placed on a welding
symbol?
A: In the tail of the symbol.
18. Q: If the weld symbol is placed below the reference line, where is the weld made?
A: On the arrow side of the joint.
19. Q: What does a circle at the junction of the reference line and arrow indicate?
A: A weld that is to be made all around the joint (e.g., a pipe flange).
20. Q: What does a filled-in (solid) triangle on the reference line represent?
A: A fillet weld.
, 21. Q: What dimension is given to the left of the weld symbol on the reference line?
A: The length of the weld.
22. Q: What does the number to the right of the weld symbol indicate?
A: The pitch (center-to-center spacing) of intermittent welds.
23. Q: What does a back or backing weld symbol look like?
A: A half-circle on the opposite side of the reference line from the main weld symbol.
24. Q: What is a "field weld" symbol?
A: A small flag at the junction of the arrow and reference line, indicating the weld is to
be made on-site, not in the shop.
25. Q: What type of joint is represented by two plates meeting at a 90-degree angle?
A: A T-joint or a fillet joint.
26. Q: On an isometric drawing, what do hidden lines represent?
A: Features that are not visible from the current viewpoint, shown with dashed lines.
27. Q: What does the abbreviation "CL" typically mean on a drawing?
A: Center Line.
28. Q: What is the purpose of a bill of materials (BOM)?
A: To list all the components, materials, and quantities required to fabricate an assembly.
29. Q: What does the term "NOT TO SCALE" (NTS) on a drawing mean?
A: The drawing is for dimensional information only, and the graphical representation is
not proportionally accurate.
30. Q: What does a "break line" on a drawing indicate?
A: That a long uniform section has been shortened to save space on the drawing.
Section C: Tools & Equipment (15 Questions)
31. Q: What is the primary function of a wire feeder in GMAW/FCAW?
A: To push the electrode wire from the spool at a controlled, consistent speed (wire feed
speed).
32. Q: What is the purpose of the gas lens in a GTAW torch?
A: To provide a more laminar (smoother) gas flow, improving shielding and allowing
greater stick-out.
33. Q: What tool is used to remove slag from a weld bead?
A: A chipping hammer and/or a wire brush.
, 34. Q: What is a "spatter" and how can it be reduced on the nozzle?
A: Spatter is small droplets of molten metal expelled during welding. It can be reduced
with anti-spatter spray or gel.
35. Q: What does a regulator do on a gas cylinder?
A: It reduces the high, variable pressure from the cylinder to a lower, steady working
pressure for the torch.
36. Q: What is the purpose of a check valve in a welding torch setup?
A: To prevent the backflow of gases, which could cause a dangerous flashback into the
hoses or regulator.
37. Q: What instrument is used to check the amperage output of a welding machine?
A: An amp meter (or a clamp-on multimeter capable of measuring DC current).
38. Q: Why must you never use oil or grease on oxygen fittings?
A: Oil and grease can ignite violently in the presence of pure oxygen under pressure.
39. Q: What is a "soapstone" and what is it used for?
A: A heat-resistant talc stick used for marking layout lines on metal.
40. Q: What is the function of the contact tip in a GMAW gun?
A: It transfers the electrical current to the welding wire and guides the wire.
41. Q: What safety device must be used with a portable grinder?
A: A guard that covers at least 180 degrees of the grinding wheel.
42. Q: What is a "chain clamp" or "dog" used for?
A: To pull plates into alignment and hold them for tack welding.
43. Q: What does DCEP stand for in electrical polarity?
A: Direct Current Electrode Positive (Reverse Polarity).
44. Q: What does DCEN stand for?
A: Direct Current Electrode Negative (Straight Polarity).
45. Q: Which polarity (DCEP or DCEN) provides greater penetration in SMAW?
A: DCEP (Electrode Positive).
Section D: Materials (15 Questions)
46. Q: What does the "E" in E4918 electrode classification stand for?
A: Electrode.
QUESTIONS WITH ANSWERS
CWB Level 1 (Fundamentals) Exam Study Guide 2026: 100 Q&A
Section A: Safety (15 Questions)
1. Q: What is the primary purpose of a Material Safety Data Sheet (MSDS/SDS)?
A: To provide detailed information on the properties, hazards, safe use, storage, and
emergency measures for a controlled product.
2. Q: What type of fire extinguisher is suitable for electrical fires?
A: Class C fire extinguisher (CO2 or dry chemical).
3. Q: What is the most significant health risk associated with welding galvanized steel?
A: Metal fume fever, caused by inhaling zinc oxide fumes.
4. Q: What PPE (Personal Protective Equipment) is essential for head protection in
welding?
A: A welding helmet with the proper shade lens, and sometimes a fire-resistant skull cap
underneath.
5. Q: Why must cylinders be secured in an upright position?
A: To prevent them from falling and damaging the valve, which could turn the cylinder
into a dangerous projectile.
6. Q: What does WHMIS stand for?
A: Workplace Hazardous Materials Information System.
7. Q: What is the danger of using oxygen to blow dust off clothing or equipment?
A: Oxygen saturation can make materials highly flammable, leading to a severe fire risk.
8. Q: What should you do if you hear a hissing sound from a gas cylinder?
A: Evacuate the area if it's a major leak, and inform the supervisor/gas monitor
immediately. Do not attempt to fix it yourself unless trained.
9. Q: What is arc flash, and what are its effects?
A: A burn to the skin and eyes caused by ultraviolet and infrared radiation from the
welding arc. Effects include sunburn-like skin damage and "welder's flash"
(photokeratitis) in the eyes.
, 10. Q: What is a confined space, and why is it dangerous for welders?
A: An enclosed or partially enclosed space not designed for continuous occupancy.
Dangers include toxic fume accumulation, oxygen deficiency, and entrapment.
11. Q: What is the purpose of ventilation in a welding shop?
A: To remove harmful welding fumes, gases, and dust from the welder's breathing zone
and the general work area.
12. Q: What should you check on a grinding wheel before use?
A: The ring test for cracks, proper guarding, and that the wheel speed (RPM) matches
the grinder's rating.
13. Q: What is the primary hazard of carbon monoxide (CO) in welding?
A: It is a colorless, odorless gas that displaces oxygen in the blood, causing asphyxiation,
headaches, dizziness, and death.
14. Q: Why must fuel gas cylinders (e.g., acetylene, propane) never be used on their side?
A: Acetylene is dissolved in acetone, and tipping can allow the solvent to be drawn into
the hose and torch, causing a dangerous flare-up or explosion.
15. Q: What is the correct first aid for a thermal burn?
A: Cool the burn with cool, clean running water for at least 10-20 minutes. Cover with a
sterile, non-stick dressing. Seek medical attention for serious burns.
Section B: Drawing & Symbols (15 Questions)
16. Q: What does a welding symbol consist of?
A: A reference line, arrow, and tail, with supplementary symbols, dimensions, and
specifications placed around it.
17. Q: Where is the weld specification (e.g., process, electrode) placed on a welding
symbol?
A: In the tail of the symbol.
18. Q: If the weld symbol is placed below the reference line, where is the weld made?
A: On the arrow side of the joint.
19. Q: What does a circle at the junction of the reference line and arrow indicate?
A: A weld that is to be made all around the joint (e.g., a pipe flange).
20. Q: What does a filled-in (solid) triangle on the reference line represent?
A: A fillet weld.
, 21. Q: What dimension is given to the left of the weld symbol on the reference line?
A: The length of the weld.
22. Q: What does the number to the right of the weld symbol indicate?
A: The pitch (center-to-center spacing) of intermittent welds.
23. Q: What does a back or backing weld symbol look like?
A: A half-circle on the opposite side of the reference line from the main weld symbol.
24. Q: What is a "field weld" symbol?
A: A small flag at the junction of the arrow and reference line, indicating the weld is to
be made on-site, not in the shop.
25. Q: What type of joint is represented by two plates meeting at a 90-degree angle?
A: A T-joint or a fillet joint.
26. Q: On an isometric drawing, what do hidden lines represent?
A: Features that are not visible from the current viewpoint, shown with dashed lines.
27. Q: What does the abbreviation "CL" typically mean on a drawing?
A: Center Line.
28. Q: What is the purpose of a bill of materials (BOM)?
A: To list all the components, materials, and quantities required to fabricate an assembly.
29. Q: What does the term "NOT TO SCALE" (NTS) on a drawing mean?
A: The drawing is for dimensional information only, and the graphical representation is
not proportionally accurate.
30. Q: What does a "break line" on a drawing indicate?
A: That a long uniform section has been shortened to save space on the drawing.
Section C: Tools & Equipment (15 Questions)
31. Q: What is the primary function of a wire feeder in GMAW/FCAW?
A: To push the electrode wire from the spool at a controlled, consistent speed (wire feed
speed).
32. Q: What is the purpose of the gas lens in a GTAW torch?
A: To provide a more laminar (smoother) gas flow, improving shielding and allowing
greater stick-out.
33. Q: What tool is used to remove slag from a weld bead?
A: A chipping hammer and/or a wire brush.
, 34. Q: What is a "spatter" and how can it be reduced on the nozzle?
A: Spatter is small droplets of molten metal expelled during welding. It can be reduced
with anti-spatter spray or gel.
35. Q: What does a regulator do on a gas cylinder?
A: It reduces the high, variable pressure from the cylinder to a lower, steady working
pressure for the torch.
36. Q: What is the purpose of a check valve in a welding torch setup?
A: To prevent the backflow of gases, which could cause a dangerous flashback into the
hoses or regulator.
37. Q: What instrument is used to check the amperage output of a welding machine?
A: An amp meter (or a clamp-on multimeter capable of measuring DC current).
38. Q: Why must you never use oil or grease on oxygen fittings?
A: Oil and grease can ignite violently in the presence of pure oxygen under pressure.
39. Q: What is a "soapstone" and what is it used for?
A: A heat-resistant talc stick used for marking layout lines on metal.
40. Q: What is the function of the contact tip in a GMAW gun?
A: It transfers the electrical current to the welding wire and guides the wire.
41. Q: What safety device must be used with a portable grinder?
A: A guard that covers at least 180 degrees of the grinding wheel.
42. Q: What is a "chain clamp" or "dog" used for?
A: To pull plates into alignment and hold them for tack welding.
43. Q: What does DCEP stand for in electrical polarity?
A: Direct Current Electrode Positive (Reverse Polarity).
44. Q: What does DCEN stand for?
A: Direct Current Electrode Negative (Straight Polarity).
45. Q: Which polarity (DCEP or DCEN) provides greater penetration in SMAW?
A: DCEP (Electrode Positive).
Section D: Materials (15 Questions)
46. Q: What does the "E" in E4918 electrode classification stand for?
A: Electrode.
