Book 6 Flashcards
In the process of making iron, limestone is added to:
Select one:
a.
Pig iron moulds
b.
The iron ore in the moulds
c.
The blast furnace in order to form slag
d.
Make the pig iron more malleable
The blast furnace in order to form slag
Which of the following is NOT part of a typical oxyacetylene outfit?
a.
An oxygen cylinder and an acetylene cylinder
b.
A hose to mix gas from the cylinders
c.
A welding torch
d.
A cutting torch
A hose to mix gas from the cylinders
What is a nozzle used for on a pressure vessel shell?
Select one:
a.
It is used to connect feed water piping to the vessel
b.
It is used to attach safety valves to the vessel
c.
it is used to attach fittings to the vessel
d.
It is used to attach gauges to the vessel
it is used to attach fittings to the vessel
When a condition in a weld has been observed and it has been compared against a standard, what then happens?
Select one:
a.
a judgement must be made on whether it is a defect or not
b.
it must be re-tested
c.
the weld must be re-done
d.
the weld is rejected
a judgement must be made on whether it is a defect or not
If a welding electrode has the identifying number “E6016”, what does the “1” represent.
Select one:
a.
The welding position
b.
AC or DC with medium penetration
c.
DC reverse polarity with medium penetration
d.
AC with deep penetration
The welding position
What kind of effect does the transducer employ in ultrasonic testing to vibrate a quartz wafer?
a.
Electrostatic
b.
Fusion
c.
Sonic
d.
Pezoelectric
Pezoelectric
What is the Brinell Hardness Number (BHN) equal to?
a.
Load (kg)/Area of mark (mm2)
b.
Area of mark (mm2)/Load (kg)
c.
Load/Area of mark
d.
Area of mark/Load
Feedback
Load (kg)/Area of mark (mm2)
Which of the following would be used to reduce the temperature gradient in order to attain a slower cooling rate of a weld?
Select one:
a.
air cooling the weld
b.
preheating the heat affected zone
c.
post-heat the welded area
d.
quenching the component in water
preheating the heat affected zone
When is a visual inspection done on a weld?
Select one:
a.
before welding
b.
before, during, and after welding
c.
during welding
d.
before and after welding
before, during, and after welding
When conducting a weld inspection, “indications” in the weld:
Select one:
a.
may be acceptable depending on the circumstances.
b.
are found according to the methods laid out in ASME Section VIII
c.
must cause a weld to be rejected
d.
can always be found during a visual inspection
may be acceptable depending on the circumstances.
What type of metal can be cut with an oxy-acetylene cutting torch?
Select one:
a.
aluminum
b.
brass
c.
stainless steel
d.
carbon steel
carbon steel
In an Ultrasonic Test, the ultrasonic vibrations are converted to an electrical pulse in/by:
Select one:
a.
an oscilloscope
b.
a transducer
c.
a duplex converter
d.
a transmitter
a transducer
Before welding on a pressure vessel, a qualified pressure welder must:
Select one:
a.
supervised by a safety codes officer
b.
be employed by the company which owns the pressure vessel
c.
pass a welding performance test
d.
be registered with the Canadian Standards Association
pass a welding performance test
Of the following, which is NOT an advantage of the visual method of non-destructive testing?
Select one:
a.
It is relatively inexpensive
b.
It can detect sub-surface discontinuities
c.
It is easy to apply
d.
it is quick
It can detect sub-surface discontinuities
How can the mechanical properties of a metal be restored after welding?
Select one:
a.
carry out a post weld heat treatment
b.
carry out a post-heat stress treatment and quench
c.
after the weld is completed, allow the metal to cool quickly and then raise the temperature again
d.
quench the weld
carry out a post weld heat treatment
When carrying out a radiographic test on a weld, photographic film is located on one side of the test piece. What is put on the opposite side to record the test?
a.
An image quality indicator
b.
A radiation source
c.
A developer
d.
A penetrameter
A radiation source
Soldering and brazing are:
Select one:
a.
both suitable for boiler construction
b.
fusion welding processes
c.
adhesive processes
d.
low temperature processes
adhesive processes
A Brinell Tester forces a ball into a steel test coupon with a standard 3000 kg load. What is the standard load for non-ferrous metals?
a.
500 kg
b.
5 kg
c.
5000 kg
d.
50 kg
500 kg
An element that increases creep strength in metal is:
Select one:
a.
Nickel
b.
Vanadium
c.
Molybdenum
d.
Manganese
Molybdenum
Brass and bronze are alloys of:
Select one:
a.
lead
b.
aluminum
c.
copper
d.
iron
copper
ASME Section 1, Paragraph PW-39 requires newly constructed boiler shells to be placed in a furnace and heated above what temperature?
a.
595°C
b.
395°C
c.
495°C
d.
295°C
595°C
If the carbon content in a metal is greater than 2.0%, what is the resulting alloy?
a.
Wrought iron
b.
Pig iron
c.
Stainless steel
d.
Cast iron
Cast iron
With regards to a form of NDE, a transducer is part of the equipment required for a/an:
Select one:
a.
Penetrant test
b.
Ultrasonic test
c.
Eddy Current test
d.
Radiographic test
Ultrasonic test
When chromium is added to alloy steel, it:
Select one:
a.
Increases toughness
b.
Increases ductility
c.
Increases hardness
d.
Improves machinability
Increases hardness
Materials that break rather than bend when subjected to an applied external force are said to be:
Select one:
a.
Tough
b.
Malleable
c.
Hard
d.
Brittle
Brittle
What is a benefit of a double-welded joint?
Select one:
a.
it is quicker to set up
b.
it reduces residual stress
c.
it doesn’t require tack welds
d.
it requires less skill
it reduces residual stress
When talking about welding, what is the “parent metal”?
Select one:
a.
it is the filler rod metal
b.
it is the weld itself
c.
it is the original batch of metal the welded pieces were made of
d.
the pieces of metal that are being welded together
the pieces of metal that are being welded together
What is a “strength” weld?
Select one:
a.
It is a weld made which is acceptable to the boiler inspector
b.
It is a weld which is as strong as the parent metal
c.
It is a weld which is supposed to add support and strength to pressure vessel components
d.
It is a weld done with no defects
It is a weld which is as strong as the parent metal
Thick welds are:
Select one:
a.
usually not acceptable
b.
done exclusively with double welds
c.
typically done in two passes
d.
done in multiple passes
done in multiple passes
What is it called when the filler metal in a weld does not extend through the entire thickness of the parent metal?
Select one:
a.
a flaw
b.
incomplete fusion
c.
incomplete penetration
d.
porosity
incomplete penetration
When welding thick materials, proper weld groove selection and preparation allows for:
Select one:
a.
a quick weld
b.
omitting the root pass
c.
full penetration
d.
proper heat treatment
Feedback
full penetration
Aluminum alloys are used in the construction of:
Select one:
a.
Condenser tubes
b.
Electric motor field poles
c.
Internal combustion engine parts
d.
Anti-friction bearings
Internal combustion engine parts
When discussing welds, what does “full” or “complete” penetration mean?
Select one:
a.
the weld extends from one face of the parent metal to the other
b.
the heat treatment is held for as long as it takes to fully heat the parent metal
c.
the desired mechanical qualities of the metal are maintained through the entire piece of metal
d.
the complete welding rod is consumed
the weld extends from one face of the parent metal to the other
The “penetrant testing” method of non-destructive examination is able to:
Select one:
a.
detect sub-surface indications
b.
detect any indication open to the surface
c.
detect welding anomalies before the welding starts
d.
discover any discontinuity
detect any indication open to the surface
What are the mechanical properties of a metal?
a.
Strength and ductility
b.
Strength and freezing point
c.
Strength and conductivity
d.
Strength and boiling point
Strength and ductility
What are short welds, made to keep parts aligned while the parts are being welded, called?
Select one:
a.
temporary welds
b.
alignment welds
c.
fillet welds
d.
tack welds
tack welds
What is “toughness”?
Select one:
a.
the ability of a metal to resist elongation
b.
the ability of a metal to resist indentation
c.
the ability of a metal to resist breakage under sudden impact
d.
the ability of a metal to resist stress
the ability of a metal to resist breakage under sudden impact
A trained UT technician can document not only the location and size of the discontinuity but also:
Select one:
a.
the volume of the discontinuity
b.
the grade of the discontinuity
c.
the probability of failure due to the discontinuity
d.
the type of discontinuity
the type of discontinuity
When using radiographic inspection, defects such as cracks and porosity show up as:
Select one:
a.
Lighter shadows on the photographic paper
b.
Wave signals on a small screen
c.
Darker shadows on the penetrameter
d.
Darker shadows on the photographic paper
Darker shadows on the photographic paper
Besides a flashlight, what else is used during a visual inspection of a weld?
Select one:
a.
microscopes
b.
chisels
c.
magnifying glasses
d.
fluorescent lights
magnifying glasses
The Ultrasonic form of non-destructive examination is done to find
Select one:
a.
cracks
b.
surface discontinuities
c.
discontinuities
d.
sub-surface discontinuities
sub-surface discontinuities
During a welding inspection, an indication has been found to be “acceptable” when compared to a standard. What is the term given to such an acceptable indication?
Select one:
a.
a minor defect
b.
an exclusion
c.
an error
d.
a flaw
a flaw
What are “seal” welds used for?
Select one:
a.
They prevent accidental drainage from blowoff valves
b.
They prevent leakage from certain pressure vessel components such as handholes.
c.
They prevent access to internal components of pressure vessels
d.
They are used to make boiler insulation air tight
They prevent leakage from certain pressure vessel components such as handholes.
An example of non-fusion welding process is:
Select one:
a.
submerged arc
b.
forge welding
c.
brazing
d.
oxy-acetylene
brazing
When carrying out a Radiographic Test on a weld, the radiation source is located on one side of the test piece. What is put on the opposite side to record the test?
Select one:
a.
an Image Quality Indicator
b.
a penetrameter
c.
a developer
d.
photographic film
photographic film
What form of Non-Destructive Examination uses gamma rays?
Select one:
a.
Radiographic testing
b.
Fluorescent testing
c.
Ultrasonic testing
d.
Eddy Current testing
Radiographic testing
What kind of problems can be detected using the visual method while a weld is taking place?
Select one:
a.
the formation of cracks
b.
the concavity of the weld
c.
the width of the root opening
d.
the welding machine current settings
the welding machine current settings
When are incorrect root openings identified during visual inspection?
a.
After the parts are tacked together for welding
b.
Before the parts are tacked together for welding
c.
Only when the inspector allows the welder to do so
d.
When the parts are being tack-welded
Feedback
After the parts are tacked together for welding
What is the term that groups “tempering”, “normalizing”, and “preheating”?
Select one:
a.
heat treating
b.
deconcentration
c.
conditioning
d.
stress relief
heat treating
A weld inspector uses ultraviolet light when performing _________ inspection.
Select one:
a.
Dye penetrant
b.
Ultrasonic
c.
Radiographic
d.
Fluorescent penetrant
Fluorescent penetrant
What does it mean when a type of NDE is referred to as a “volumetric” test?
Select one:
a.
It means that it automatically calculates the volume and computes a percentage, of the total volume, which is free of indications.
b.
It means that it can detect indications internally in the test piece.
c.
It means that the test is done in 3 dimensions.
d.
It means that the test must be conducted on the entire piece being tested
It means that it can detect indications internally in the test piece.
Electric arc temperatures may be as high as:
Select one:
a.
4250°C
b.
5325°C
c.
7450°C
d.
8300°C
Feedback
8300°C
The problem with using brittle metals is that:
Select one:
a.
they cannot withstand high temperatures
b.
they can break suddenly and without warning
c.
they are not very strong
d.
they cannot be sharpened
they can break suddenly and without warning
The following fusion welding process utilizes a flame.
Select one:
a.
gas metal arc welding
b.
gas tungsten arc welding
c.
oxy-fuel welding
d.
shielded metal arc welding
oxy-fuel welding
A material that can be drawn out or extended in length without breakage is:
Select one:
a.
Hard
b.
Brittle
c.
Ductile
d.
Malleable
Ductile
What effect does preheating an area to be welded have on the weld?
Select one:
a.
it makes the weld brittle
b.
it makes the welds more ductile
c.
it makes the welds tough
d.
it makes the weld more quenchable
it makes the welds more ductile
The malleability of a metal:
Select one:
a.
Will usually decrease as the temperature rises
b.
Is checked using the Charpy tester
c.
Causes it to crack when struck with a hammer
d.
Usually increases with the addition of heat
Usually increases with the addition of heat
Defects in a weld can also be called:
Select one:
a.
indicators
b.
flaws
c.
observed inclusions
d.
discontinuities
discontinuities
As compared to Penetrant Testing, Radiographic testing:
Select one:
a.
can be carried out more quickly.
b.
is not as sensitive.
c.
is reliable.
d.
requires highly trained operators.
requires highly trained operators.
Gas pockets trapped within a weld are commonly called:
Select one:
a.
Flux
b.
Porosity
c.
Spatter
d.
Slugging
Porosity
Pig iron:
Select one:
a.
Is the raw material from which brass is made
b.
Contains at least 2% carbon
c.
Has most of its carbon in a combined state
d.
Is the raw material from which cast iron is made
Is the raw material from which cast iron is made
What is impact strength also known as?
Select one:
a.
ultimate strength
b.
toughness
c.
brittleness
d.
yield strength
toughness
Which one of the following fusion welding is a totally manual process?
Select one:
a.
submerged arc
b.
gas tungsten arc
c.
oxy-fuel
d.
gas metal arc
oxy-fuel
The two basic categories of welded joints are groove and:
Select one:
a.
overlapping
b.
butt
c.
fillet
d.
angle
fillet
Pig iron is:
Select one:
a.
Made from cast iron
b.
Low in carbon content
c.
Made from iron ore
d.
The same as white cast iron
Made from iron ore
The filler rod in braze welding is usually made of:
Select one:
a.
Alloy steel
b.
Brass
c.
Aluminium
d.
Bronze
Bronze
Stick welding is also referred to by which acronym?
a.
GMAW
b.
GTAW
c.
SAW
d.
SMAW
SMAW
The electrical power necessary for arc welding may be supplied by:
Select one:
a.
Solar cells
b.
Capacitors
c.
Batteries
d.
Transformers
Transformers
During submerged arc welding, _________ prevents the weld from oxidizing and cooling too fast.
Select one:
a.
Amperage
b.
Flux
c.
Rod composition
d.
Rod rate of feed
Flux
What are the welds called which are carried out on the parts of a pressure vessel which directly contains the internal forces generated?
Select one:
a.
pressure boundary welds
b.
pressure containment welds
c.
pressure integrity welds
d.
pressure mitigation welds
pressure boundary welds
Which of the following processes is NOT suitable for the construction boilers?
Select one:
a.
arc welding
b.
soldering
c.
submerged arc welding
d.
brazing
soldering
Each pass in a multi-pass weld must:
Select one:
a.
must be radiographed
b.
be laid down in the same angle as the groove face
c.
completely penetrate the parent metal
d.
fuse with the parent metal and any previous passes
fuse with the parent metal and any previous passes
The test material for a penetrant test (PT) must be:
Select one:
a.
non-ferrous
b.
ferrous
c.
non-porous
d.
porous
non-porous
This process is a non-fusion welding process which can be used to fabricate low pressure boilers.
Select one:
a.
soldering
b.
brazing
c.
forge welding
d.
arc welding
brazing
Inclusions are defined as:
Select one:
a.
Metal particles sprayed out during the weld process
b.
Pieces of rod or metal added as filler to the weld
c.
Foreign solid matter trapped in the weld
d.
Gas pockets trapped in the weld
Foreign solid matter trapped in the weld
A material resists indentation. It demonstrates the mechanical property called
Select one:
a.
Brittleness
b.
Elasticity
c.
Toughness
d.
Hardness
Hardness
The first pass of a multi-pass weld is known as the:
Select one:
a.
hot pass
b.
root pass
c.
starting pass
d.
primary pass
root pass
For the determination of what mechanical property is a Brinnell test conducted?
Select one:
a.
strength
b.
hardness
c.
ductility
d.
toughness
Feedback
hardness
Copper alloys are _______ than pure copper:
Select one:
a.
Harder to machine
b.
Weaker
c.
Less resistant to corrosion
d.
Easier to machine
Easier to machine
The two types of Penetrant Testing (PT) are fluorescent testing and:
Select one:
a.
Viscous Penetrant testing
b.
Developer testing
c.
Colour Contrast testing
d.
Infrared testing
Colour Contrast testing
Wrought iron:
Select one:
a.
Is stronger than steel
b.
Is corrosion resistant
c.
Is a non-ferrous metal
d.
Contains a high percentage of carbon
Is corrosion resistant
Ultrasonic inspection involves:
Select one:
a.
Short wavelength radiation
b.
High frequency vibrations
c.
Radiographic penetrameters
d.
Gamma rays
High frequency vibrations
When referring to Penetrant Testing, what is meant by the term “dwell time”?
Select one:
a.
It is the time allowed for the developer to pull penetrant from discontinuities.
b.
It is the time allowed for the developer to “bleed out”.
c.
It is the total length of time that the discontinuity remains visible.
d.
It is the time allowed for the penetrant to soak into discontinuities in the test piece.
It is the time allowed for the penetrant to soak into discontinuities in the test piece.
The weld inspection method that uses penetrameters is ________ inspection.
Select one:
a.
Dye penetrant
b.
Ultrasonic
c.
Fluorescent penetrant
d.
Radiographic
Radiographic
Which of the following is NOT a similarity between brazing and soldering?
a.
Both melt together the filler and base metals together
b.
Both use filler metal that is different from the parent metal
c.
Both are adhesive processes
d.
Both use capillary action to draw the filler metal into the weld joint, where it adheres to the surfaces being joined
Both melt together the filler and base metals together
Stainless steel:
Select one:
a.
Is corrosion resistant
b.
Has a high carbon content
c.
Is not an alloy steel
d.
Is magnetic
Is corrosion resistant
When Radiographic Testing is being carried out in a plant:
Select one:
a.
the testing area must be segregated
b.
may be carried out by the on-watch Shift Supervisor.
c.
a Safety Codes Officer must be present.
d.
work can carry on as usual.
the testing area must be segregated
Why is the pressure that acetylene used at so important?
Select one:
a.
because at low pressures (below 100 kPa) it becomes fluid
b.
because it is unstable at pressures above 103 kPa
c.
because it rapidly loses heat at elevated pressures
d.
because at high pressures it separates into acetone and trilene
because it is unstable at pressures above 103 kPa
Arc welding produces:
Select one:
a.
no splatter, and minimal ultraviolet energy
b.
a weld which has inferior metal properties than the parent metals
c.
an adhesive reaction between the metals
d.
a puddle of molten metal at the electrode tip
a puddle of molten metal at the electrode tip
This type of non-fusion welding is often used in the construction of refrigeration systems.
Select one:
a.
stick welding
b.
hot gluing
c.
silver brazing
d.
soldering
silver brazing
The purpose of flux is to:
Select one:
a.
preheat the weld
b.
promote the creation of “slag”
c.
prevent oxidation of the metals due to heat
d.
clean the welds after the procedure is done
Feedback
prevent oxidation of the metals due to heat
Medium carbon steel becomes difficult to weld when its carbon content exceeds:
Select one:
a.
10%
b.
3.5%
c.
0.35%
d.
0.25%
0.35%
Where do the cracks extend when stress concentrates and failure begins?
a.
To only visible parts of the material
b.
Halfway through the material
c.
To all parts of the material
d.
To the surface of the material
To the surface of the material
Aluminum is produced from:
Select one:
a.
Copper and zinc
b.
Bauxite
c.
Non-ferrous ore
d.
Aluminum ore
Bauxite
A copper alloy that contains tin, and sometimes zinc, is:
Select one:
a.
Brass
b.
Bronze
c.
White metal
d.
Babbit
Bronze
Submerged arc welding is a(an)_____ welding process.
Select one:
a.
Oxy-acetylene
b.
AC electric
c.
AC or DC electric
d.
DC
AC or DC electric
Steel is an alloys of iron and carbon, but contains less than what percentage of carbon?
a.
2.0%
b.
1.0%
c.
0.5%
d.
1.5%
2.0%
If a welding electrode has the following identifying number “E7015”, what does the “70” represent?
Select one:
a.
70 kPa
b.
70 000 kPa
c.
70 psi
d.
70 000 psi
70 000 psi
In order to avoid residual stresses after welding, alloy steels:
Select one:
a.
Cannot contain any copper
b.
Must contain copper
c.
Should be heated before, during and after welding
d.
Must be heated after welding
Should be heated before, during and after welding
The quickest, easiest, and least expensive method of weld inspection is _________ inspection. .
Select one:
a.
Visual
b.
Ultrasonic
c.
Dye penetrant
d.
Radiographic
Visual
