CWB Welding Inspector Level III Study Guide
Latest Update 2024-2025 Actual Exam Questions
and 100% Verified Correct Answers Guaranteed
A+
A Wide solidification range and rapid growth rate during solidification will encourage:
(a) planar growth.
(b) equilibrium conditions.
(c) no constitutional supercooling.
(d) dendritic growth.
(e) eutectic formation. - CORRECT ANSWER: (d)
Can strain aging in low carbon steels take place at room temperature? - CORRECT
ANSWER: Yes
Centerline hot cracking im more likely with:
(a) shallow, round welds.
(b) short weld pools.
(c) wide groove angles.
(d) deep, narrow welds.
(e) vertical welds. - CORRECT ANSWER: (d)
Compared with pure tungsten, a thoriated tungsten electrode is expected to:
(a) get hotter more quickly.
(b) absorb more electrons.
(c) have a shorten life.
(d) operate at a lower temperature for the same current.
(e) emit more ions. - CORRECT ANSWER: (d)
, Electricity can be conducted by:
(a) atoms and electrons.
(b) electrons and ions.
(c) only ions. - CORRECT ANSWER: (b)
From Figure 11.10(Module 20-2014, page 54), estimate the cooling rate for a
submerged arc bead on a 19 mm plate (no preheat) with an energy input of 1.77 kJ/in. -
CORRECT ANSWER: 16°C/s at 540°C
Hot Cracking during welding is more likely in:
(a) pure metals.
(b) alloys with a wide solidification range.
(c) alloys with a very high alloy content. - CORRECT ANSWER: (b)
How can porosity due to nitrogen be controlled in welding nickel? - CORRECT
ANSWER: By using filler metal containing titanium.
How does yield strength vary with grain size? - CORRECT ANSWER: Inversely as the
square root of the grain size.
How many phases are there in a eutectic- one or two? - CORRECT ANSWER: Two
If centerline solidification cracking is occuring in welding a structural steel what is a
likely cause?
(a) electrical extension too long
(b) arc voltage too high
(c) welding current and speed too high
(d) weld too large - CORRECT ANSWER: (c)
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