CWB Welding Inspector Level 2 Exam
By ExamNavigator
- / 3
CWB Welding Inspector Level 2 Exam
- What is the term used to describe the following condition of lost corrosion resistance?
"When certain stainless steels are heated between 500-850° C, carbides form at the grain boundaries and cause a local depletion of chromium."
(A) Oxidization (B) Increased toughness (C) Solution heat treatment (D) Sensitization
Answer: (D) Sensitization
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and "sweats out" at the grain boundaries
- On a radiograph, undercut appears as a line.
(A) light (B) dark
Answer: (B) dark
- What is the Canadian Standard for safety in welding?
Answer: CSA W117.2
- What is the typical three-phase input voltage in most Canadian welding shops?
Answer: 600V
- True or False: The cable from the workpiece back to the welding machine is called the
"ground lead".
Answer: False. The correct term is the "work lead".
- What is the type of radiation that can damage living cells?
Answer: Ionizing
- Name two examples of ionizing radiation.
Answer: X-rays and Gamma rays
- What is the minimum suggested shade for a welding helmet when using 5/32 SMAW
electrode at 150 A?
Answer: Shade 10
- / 3
- Approx. how far could spatter travel when welding/cutting from 2.5m high?-
Answer: Possibly up to 6m
- What is the toxic component contained in some copper alloys?
Answer: Beryllium
- Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW]
Answer: FCAW
- What do the terms TLV and TWA stand for?
Answer:
TLV: Threshold limit value
TWA: Time weighted average
- Is helium lighter or heavier than air?
Answer: Lighter
- The action of UV light on oxygen produces which toxic gas?
Answer: Ozone
- Which common fuel gas has the widest range where it can become flammable when
mixed with air?
Answer: Acetylene
- What substance should you NEVER apply to a stiff pressure-adjusting screw on an
oxygen regulator?
Answer: Oil or grease
- What is the maximum gauge pressure that acetylene should be used? (kPa/psi)
Answer: 103 kPa (15 psi)
- Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon
solvents?
Answer: Phosgene gas
- What is the typical max. OCV of an AC welding machine?
Answer: 80 V
- In an isometric drawing, the lines (for width, length and depth) are inclined at an angle of
how many degrees?
Answer: 30°
- / 3