CWB Welding Inspector Level III Study Guide

CWB Welding Inspector Level III Study Guide Latest Update - 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) 1 / 2

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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