1
Applying preheat when
welding carbon manganese steel is normally done to avoid:
a)
Slag inclusions
b)
Hydrogen cracking
c)
Lack of sidewall fusion
d)
Porosity
Answer: b) Hydrogen cracking
2 Which
of following mechanical properties of a weld in carbon manganese steel is most
affected if the heat input per unit length of weld is excessively high?
a)
Elongation
b)
Tensile strength
c)
Hardness
d)
Toughness
Answer: d) Toughness
3 You
observe centerline cracking a weld that as been made one of five work stations
each making similar components. The first action to take is:
a)
Impound all welding
consumables
b)
Report the occurrence to high authority
c)
Stop all welding
d)
Call for full NDT
checks
Answer: b) Report the occurrence to high authority
4 Which
of the following defects is unlikely to be found by visual inspection.
a)
Linear misalignment
b)
Undercut
c)
Overlap
d)
Linear slag inclusion
Answer: d) Linear slag inclusion
5 Which
of the following welding processes uses a resisitive heating system to achieve
weld metal deposition.
a)
Manual metal arc
welding
b)
Submerged-arc welding
c)
Electro slag welding
d)
Resistance spot welding
Answer: d) Resistance spot welding
6 Which
of the following units could Charpy V notch energy be measured in?
a)
Pounds per square inch
b)
Joules
c)
Newtons per square
millimeter
d)
None of the above
Answer: b) Joules
7 The
usual method of assessing the sensitivity of radiograph is by means of a:
a)
Dosimeter
b)
Fluoroscope
c)
IQI ( Penetrameter)
d)
Clinometer
Answer: c) IQI ( Penetrameter)
8 Under
normal contract conditions, weld procedure approval tests for pipe work are:
a)
Mandatory
b)
Depend upon site and
weather conditions
c)
Dependent upon the
contractor’s confidence in his procedures
d)
Only required when CO2
welding is to be used.
Answer: a) Mandatory
9 Which
of the following destructive tests is not normally required for welder approval
test for mild steel?
a)
Bend test
b)
Macro examination
c)
Impact tests
d)
Fracture tests
Answer: c) Impact tests
10 Hydrogen
controlled electrodes were developed principally for:
a)
The prevention of
porosity
b)
The prevention of cracking
c)
The enhancement of arc
voltage
d)
Their ease of arc
starting
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