CWB WELDING INSPECTOR LEVEL 3
EXAM 2026 UPDATE QUESTIONS AND
CORRECT VERIFIED ANSWERS ALREADY
GRADED A+ (BRAND NEW VISION)
What is thermal conductivity divided by specific heat and specific gravity known as? -
ans-Thermal diffusivity
Would a joint geometry designed for thick stainless steel be perfectly acceptable for
welding thick aluminum? - ans-No. Grooves for thick aluminum would have a wider
angle than for stainless steel.
When welding on a thick plate the cooling rate is proportional to the:
(a) heat input.
(b) inverse of the heat input.
(c) inverse of the square of the heat input. - ans-(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. -
ans-16°C/s at 540°C
Which of the following metals is likely to need the greatest degree of shielding from the
atmosphere during welding?
(a) copper
(b) lead
(c) titanium
(d) steel
(e) gold - ans-(c)
In an electroslag flux the current is carried mainly by:
(a) neutral oxides.
(b) holes.
(c) mobile ions.
(d) thermionic electrons.
(e) free electrons. - ans-(c)
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. - ans-(d)
, The presence of close-packed planes in FCC metals gives many of them the special
property of:
(a) good high-temperature strength.
(b) the ability to undergo extensive plastic deformation.
(c) brittleness at low temperatures.
(d) complete solubility with all other metals.
(e) small grains. - ans-(b)
Work hardening occurs because of:
(a) fine precipitates.
(b) a reduction in the number of dislocations making slip more difficult.
(c) locking of dislocations by carbon and nitrogen atoms.
(d) multiplication and congestion of dislocations. - ans-(e)
Nickel and copper have complete solid solubility. Copper has a lower melting point then
nickel. If a 50/50 Cu-Ni alloy is cooled from the liquid what will be the composition of the
first solid to form?
(a) 50% Cu
(b) less than 50% Cu
(c) Pure Cu
(d) Pure Ni
(e) more than 50% Cu - ans-(b)
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. - ans-(d)
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. - ans-(d)
Porosity in welds due to a specific gas is more likely if the:
(a) solubility of the gas at the freezing point is much lower than at higher temperatures.
(b) solubility of the gas at the freezing point is very high.
(c) gas does not dissolve in the liquid.
(d) solubility is independent of temperature.
(e) gas has a high solubility in the solid. - ans-(a)
Increasing the initial plate temperature (preheat):
EXAM 2026 UPDATE QUESTIONS AND
CORRECT VERIFIED ANSWERS ALREADY
GRADED A+ (BRAND NEW VISION)
What is thermal conductivity divided by specific heat and specific gravity known as? -
ans-Thermal diffusivity
Would a joint geometry designed for thick stainless steel be perfectly acceptable for
welding thick aluminum? - ans-No. Grooves for thick aluminum would have a wider
angle than for stainless steel.
When welding on a thick plate the cooling rate is proportional to the:
(a) heat input.
(b) inverse of the heat input.
(c) inverse of the square of the heat input. - ans-(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. -
ans-16°C/s at 540°C
Which of the following metals is likely to need the greatest degree of shielding from the
atmosphere during welding?
(a) copper
(b) lead
(c) titanium
(d) steel
(e) gold - ans-(c)
In an electroslag flux the current is carried mainly by:
(a) neutral oxides.
(b) holes.
(c) mobile ions.
(d) thermionic electrons.
(e) free electrons. - ans-(c)
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. - ans-(d)
, The presence of close-packed planes in FCC metals gives many of them the special
property of:
(a) good high-temperature strength.
(b) the ability to undergo extensive plastic deformation.
(c) brittleness at low temperatures.
(d) complete solubility with all other metals.
(e) small grains. - ans-(b)
Work hardening occurs because of:
(a) fine precipitates.
(b) a reduction in the number of dislocations making slip more difficult.
(c) locking of dislocations by carbon and nitrogen atoms.
(d) multiplication and congestion of dislocations. - ans-(e)
Nickel and copper have complete solid solubility. Copper has a lower melting point then
nickel. If a 50/50 Cu-Ni alloy is cooled from the liquid what will be the composition of the
first solid to form?
(a) 50% Cu
(b) less than 50% Cu
(c) Pure Cu
(d) Pure Ni
(e) more than 50% Cu - ans-(b)
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. - ans-(d)
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. - ans-(d)
Porosity in welds due to a specific gas is more likely if the:
(a) solubility of the gas at the freezing point is much lower than at higher temperatures.
(b) solubility of the gas at the freezing point is very high.
(c) gas does not dissolve in the liquid.
(d) solubility is independent of temperature.
(e) gas has a high solubility in the solid. - ans-(a)
Increasing the initial plate temperature (preheat):
