CWB Level II QUESTIONS &
ANSWERS(RATED A+)
On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - ANSWER(B) dark
What is the Canadian Standard for safety in welding? - ANSWERCSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? -
ANSWER600V
True or False: The cable from the workpiece back to the welding machine is called
the "ground lead". - ANSWERFalse. The correct term is the "work lead".
What is the type of radiation that can damage living cells? - ANSWERIonizing
Name two examples of ionizing radiation. - ANSWERX-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW
electrode at 150 A? - ANSWERShade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high? -
ANSWERPossibly up to 6m
What is the toxic component contained in some copper alloys? - ANSWERBeryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - ANSWERFCAW
What do the terms TLV and TWA stand for? - ANSWERTLV: Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air? - ANSWERLighter
The action of UV light on oxygen produces which toxic gas? - ANSWEROzone
Which common fuel gas has the widest range where it can become flammable when
mixed with air? - ANSWERAcetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an
oxygen regulator? - ANSWEROil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi) -
ANSWER103 kPa (15 psi)
,Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon
solvents? - ANSWERPhosgene gas
What is the typical max. OCV of an AC welding machine? - ANSWER80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an
angle of how many degrees? - ANSWER30°
What are the maximum number of views in an orthographic drawing? - ANSWER6
What are the two general classes of picture drawings? - ANSWERPerspective and
Isometric
What are the 5 basic weld types? - ANSWER1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
What is the term used to describe the following condition of lost corrosion
resistance?
"When certain stainless steels are heated between 500-850° C, carbides form at the
grain boundaries and cause a local depletion of chromium."
(A) Oxidization
(B) Increased toughness
(C) Solution heat treatment
(D) Sensitization - ANSWER(D) Sensitization
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and
"sweats out" at the grain boundaries
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
ANSWER30,000
True or False: All plasma arc cutting equipment is operated using DCEN. -
ANSWERTrue
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
- ANSWERFalse
What are the two basic methods of plasma torch operation? - ANSWERTransferred
and Non-Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT
and __________ Side.
[RIGHT / LEFT] - ANSWERLEFT
, What is the difference between a "weld symbol" and a "welding symbol"? -
ANSWERA "weld symbol" indicates the specific kind of weld to be used (ex. fillet),
and is contained inside of "welding symbol".
In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet
weld symbol? - ANSWERLEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the
fillet weld symbol? - ANSWERRIGHT
In what direction do the electrons flow in an electrical arc?
(A) anode --> cathode
(B) cathode --> anode - ANSWER(B) cathode --> anode
In arc welding, the arc temperature can exceed temperatures of __________ °
Celsius? - ANSWER30,000
Which welding process has the highest arc efficiency? - ANSWERSAW
Arc voltage __________ when arc length is increased.
[Increased / Decreased] - ANSWERIncreases
In GTAW, what type of penetration and weld width can be expected when using
DCEP? - ANSWERShallow penetration, and wide weld
Which polarity is most often chosen for direct current GTAW welding of steels and
why? - ANSWERDCEN. More heat concentrated at the workpiece --> deeper
penetration
Does SMAW use CC or CV? - ANSWERCC
For out-of-position welding, would you select a small or large diameter electrode? -
ANSWERA small diameter electrode
Does GMAW use CC or CV? - ANSWERCV
What happens to the SAW weld when you switch from DCEP to DCEN? -
ANSWERIncreased deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes? - ANSWER120°
Celsius
When using a consumable electrode in DCEN, the majority of the heat is
concentrated on the __________.
(A) Electrode
(B) Workpiece - ANSWER(A) Electrode
ANSWERS(RATED A+)
On a radiograph, undercut appears as a _________ line.
(A) light
(B) dark - ANSWER(B) dark
What is the Canadian Standard for safety in welding? - ANSWERCSA W117.2
What is the typical three-phase input voltage in most Canadian welding shops? -
ANSWER600V
True or False: The cable from the workpiece back to the welding machine is called
the "ground lead". - ANSWERFalse. The correct term is the "work lead".
What is the type of radiation that can damage living cells? - ANSWERIonizing
Name two examples of ionizing radiation. - ANSWERX-rays and Gamma rays
What is the minimum suggested shade for a welding helmet when using 5/32 SMAW
electrode at 150 A? - ANSWERShade 10
Approx. how far could spatter travel when welding/cutting from 2.5m high? -
ANSWERPossibly up to 6m
What is the toxic component contained in some copper alloys? - ANSWERBeryllium
Which welding process will likely have the highest fume generation rate?
[SMAW / SAW / FCAW] - ANSWERFCAW
What do the terms TLV and TWA stand for? - ANSWERTLV: Threshold limit value
TWA: Time weighted average
Is helium lighter or heavier than air? - ANSWERLighter
The action of UV light on oxygen produces which toxic gas? - ANSWEROzone
Which common fuel gas has the widest range where it can become flammable when
mixed with air? - ANSWERAcetylene
What substance should you NEVER apply to a stiff pressure-adjusting screw on an
oxygen regulator? - ANSWEROil or grease
What is the maximum gauge pressure that acetylene should be used? (kPa/psi) -
ANSWER103 kPa (15 psi)
,Which toxic gas is produced when welding on surfaces with chlorinated hydrocarbon
solvents? - ANSWERPhosgene gas
What is the typical max. OCV of an AC welding machine? - ANSWER80 V
In an isometric drawing, the lines (for width, length and depth) are inclined at an
angle of how many degrees? - ANSWER30°
What are the maximum number of views in an orthographic drawing? - ANSWER6
What are the two general classes of picture drawings? - ANSWERPerspective and
Isometric
What are the 5 basic weld types? - ANSWER1) Groove
2) Fillet
3) Plug/Slot
4) Surfacing
5) Edge
What is the term used to describe the following condition of lost corrosion
resistance?
"When certain stainless steels are heated between 500-850° C, carbides form at the
grain boundaries and cause a local depletion of chromium."
(A) Oxidization
(B) Increased toughness
(C) Solution heat treatment
(D) Sensitization - ANSWER(D) Sensitization
Note: Also known as "carbide precipitation" -- Chromium binds to carbides, and
"sweats out" at the grain boundaries
Plasma cutting torch temp can reach temperatures of __________ ° Celsius. -
ANSWER30,000
True or False: All plasma arc cutting equipment is operated using DCEN. -
ANSWERTrue
True or False: Stainless steel can be readily cut with a normal oxy-fuel gas process.
- ANSWERFalse
What are the two basic methods of plasma torch operation? - ANSWERTransferred
and Non-Transferred arc
In North America, the 3 othographic views most commonly-used are: TOP, FRONT
and __________ Side.
[RIGHT / LEFT] - ANSWERLEFT
, What is the difference between a "weld symbol" and a "welding symbol"? -
ANSWERA "weld symbol" indicates the specific kind of weld to be used (ex. fillet),
and is contained inside of "welding symbol".
In a welding symbol, is the size of the weld located to the LEFT or RIGHT of the fillet
weld symbol? - ANSWERLEFT
In a welding symbol, is the length of the weld located to the LEFT or RIGHT of the
fillet weld symbol? - ANSWERRIGHT
In what direction do the electrons flow in an electrical arc?
(A) anode --> cathode
(B) cathode --> anode - ANSWER(B) cathode --> anode
In arc welding, the arc temperature can exceed temperatures of __________ °
Celsius? - ANSWER30,000
Which welding process has the highest arc efficiency? - ANSWERSAW
Arc voltage __________ when arc length is increased.
[Increased / Decreased] - ANSWERIncreases
In GTAW, what type of penetration and weld width can be expected when using
DCEP? - ANSWERShallow penetration, and wide weld
Which polarity is most often chosen for direct current GTAW welding of steels and
why? - ANSWERDCEN. More heat concentrated at the workpiece --> deeper
penetration
Does SMAW use CC or CV? - ANSWERCC
For out-of-position welding, would you select a small or large diameter electrode? -
ANSWERA small diameter electrode
Does GMAW use CC or CV? - ANSWERCV
What happens to the SAW weld when you switch from DCEP to DCEN? -
ANSWERIncreased deposition rate, but less penetration
What is the temperature for storing low-hydrogen electrodes? - ANSWER120°
Celsius
When using a consumable electrode in DCEN, the majority of the heat is
concentrated on the __________.
(A) Electrode
(B) Workpiece - ANSWER(A) Electrode
