CWB Welding Inspector Level II -Ch 8 Mechanical Testing Of Welds Exam Q&A-s Latest Update.pdf

CWB Welding Inspector Level II - Chapter 8
Mechanical Testing Of Welds
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Terms in this set (70)


What happens to the The notch goes into tension, causing an initiation of
notch in the Charpy fracture from the notch
specimen when it is
struck by the pendulum?


The notch goes into a
twisting moment, causing
an initiation of torsion
forces
The notch goes into
tension, causing an
initiation of fracture from
the notch
The notch goes into
compression, causing an
initiation of fracture from
the notch
Initiation of fracture from
the notch is caused by
the pendulum setting up
a fatigue crack at the
notch root

,A proof test on a Water
pressure vessel is usually
performed using which
medium?


Air
Argon
Nitrogen
Water

What is an extensometer C) To measure the strain
used for in a tensile test?
(Multiple Choice)


A) To reveal the ductility
of aluminum
B) To reviewal internal
weld defects
C) To measure the strain
D) To keep the specimen
centred in the jaws

What is the drop weight B) Real world fracture testing
test? (Multiple Choice)


A) A tension test
B) Real world fracture
testing
C) UTS based on heating
D) Reducing sample size
for testing

,Which hardness test is B) Vickers hardness test
the preferred method of
testing both the weld
metal and HAZ?
(Multiple Choice)


A) Brinell hardness test
B) Vickers hardness test
C) Rockwell "C" hardness
test
D) Rockwell "B" hardness
test

Which of the following B) Overlap, surface undercut, inclusions, and
discontinuities have the microcracks
highest probability of
leading to fatigue failure?
(Multiple Choice)


A) Porosity, incomplete
fusion at the centreline of
a two-sided joint, and
under-welding
B) Overlap, surface
undercut, inclusions, and
microcracks
C) Weld reinforcement,
convexity, and porosity
D) Under-welding, over-
welding, and convexity

, When the stress rises to a A) the ultimate tensile strength of the material.
maximum value in a
tensile test it is known as:
(Multiple Choice)


A) the ultimate tensile
strength of the material.
B) the yield strength of
the material.
C) the elastic limit of the
material.
D) The stress/strain curve
of the material.

Fatigue failure occurs B) below yield.
under repeated and
fluctuating loads, when
stresses are: (Multiple
Choice)


A) above yield.
B) below yield.
C) above UTS.
D) at UTS.

Young's Modulus (E) C) the stiffness of a material.
indicates: (Multiple
Choice)


A) the difference
between yield strength
and deformation.
B) the toughness of a
material.
C) the stiffness of a
material.
D) the stress and strains
applied.