CWB MODULE 1 QUESTIONS &
ANSWERS(RATED A+)
True or False? Creating a safe working environment is strictly the responsibility of the
employer? - ANSWERFalse, it the the joint responsibility of the employer and employee.
WHMIS stands for:
a) Workers Health Monitoring System
b) Workplace Hazardous Materials Information System
c) Workers for a Healthy Manufacturing Industry Society - ANSWERb) Workplace
Hazardous Materials Information System
What are three ways that WHMIS information is conveyed to the workplace? -
ANSWER1. Training
2. Labels
3. MSDS (Material Safety Data Sheet)
If you wish to find out the hazardous ingredients of a product and their toxicological
properties, where would you look? - ANSWERMSDS (Material Safety Data Sheet)
Is there a Canadian Standard for safety in welding? - ANSWERYes, CSA W117.2
What is the typical three-phase input voltage to welding machines in most shops? -
ANSWERUSA: 480V
CA: 600V
True or False? The voltage on the secondary side of welding machines is always so low
there can never be a danger of electric shocks? - ANSWERFalse
Why is it possible to still get an electric shock by touching only one wire of an electric
circuit? - ANSWERThe current can pass through the body and return through the
ground.
True or False? The cable from the workpiece back to the welding machine is correctly
called the "ground lead" - ANSWERFalse, it is called the work lead.
Why should you avoid welding with wet hands or when standing in water? -
ANSWERWater increases the contact resistance and increases the risk of a shock.
Of the two classes of radiation, which is the one that can damage living cells? Give two
examples. - ANSWERIonizing radiation. Examples: X-rays or Gamma-rays.
,Which of the following operations emits this type of radiation?
a) shielded metal arc welding
b) arc cutting
c) radiography of welds
d) resistance welding - ANSWERc) radiography of welds
Is it true that you could suffer from "sunburn" on exposed skin by just being near a
welding arc? - ANSWERYes, true.
What is the suggested shade number for a welder's helmet when using 5/32 in SMAW
electrode at 150A? - ANSWER10
Which of the following situations is most likely to produce the greatest amount of direct
and reflected ultraviolet light?
a) resistance welding two thin steel sheets
b) gas metal arc welding aluminium plate
c) submerged arc welding - ANSWERb) gas metal arc welding aluminium plate
True or False? Facepiece respirators with mechanical filters will remove all fumes and
gases emitted in welding. - ANSWERFalse, Gases are not removed. Most fumes will be
removed but not 100%
Approximately how far could spatter travel when welding or cutting on structure about
2.5 m high?
a) Possibly up to 6 m
b) no more than 1 m
c) up to 20 m - ANSWERa) Possibly up to 6 m
What is the suggested shade number for a welder's helmet when using >1/4 in SMAW
electrode at 500A? - ANSWER11
What is the suggested shade number for a welder's helmet when using 3 in SMAW
electrode at 150A? - ANSWER8
, What is the suggested shade number for a welder's helmet when using < 3/32 in SMAW
electrode at 50A? - ANSWER7
What is the suggested shade number for a welder's helmet when using
GMAW/FCAW/MCAW at 60-500A? - ANSWER10
What is the suggested shade number for a welder's helmet when using GMAW at <60
A? - ANSWER7
What is the suggested shade number for a welder's helmet when using GTAW at <50-
150 A? - ANSWER8
What is the suggested shade number for a welder's helmet when using GTAW at 150-
500 A? - ANSWER10
What is the suggested shade number for a welder's helmet when air carbon arc cutting
light at <500 A? - ANSWER10
What is the suggested shade number for a welder's helmet when air carbon arc cutting
heavy at 500 - 1000 A? - ANSWER11
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging very light at 20 A? - ANSWER5
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging light at 20 - 100 A? - ANSWER8
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging medium at 100 - 400 A? - ANSWER8
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging heavy at 400 - 800 A? - ANSWER10
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (light) of <25mm/ <1in? - ANSWER3
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (medium) of 25-100mm/ <1-6in? - ANSWER4
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (heavy) of >150mm/ >6in? - ANSWER5
For the SMAW process, which contributes more to the production of fume: base metal
or electrode? - ANSWERelectrode
Some copper alloys contain a very toxic component. What is it? - ANSWERBeryllium
ANSWERS(RATED A+)
True or False? Creating a safe working environment is strictly the responsibility of the
employer? - ANSWERFalse, it the the joint responsibility of the employer and employee.
WHMIS stands for:
a) Workers Health Monitoring System
b) Workplace Hazardous Materials Information System
c) Workers for a Healthy Manufacturing Industry Society - ANSWERb) Workplace
Hazardous Materials Information System
What are three ways that WHMIS information is conveyed to the workplace? -
ANSWER1. Training
2. Labels
3. MSDS (Material Safety Data Sheet)
If you wish to find out the hazardous ingredients of a product and their toxicological
properties, where would you look? - ANSWERMSDS (Material Safety Data Sheet)
Is there a Canadian Standard for safety in welding? - ANSWERYes, CSA W117.2
What is the typical three-phase input voltage to welding machines in most shops? -
ANSWERUSA: 480V
CA: 600V
True or False? The voltage on the secondary side of welding machines is always so low
there can never be a danger of electric shocks? - ANSWERFalse
Why is it possible to still get an electric shock by touching only one wire of an electric
circuit? - ANSWERThe current can pass through the body and return through the
ground.
True or False? The cable from the workpiece back to the welding machine is correctly
called the "ground lead" - ANSWERFalse, it is called the work lead.
Why should you avoid welding with wet hands or when standing in water? -
ANSWERWater increases the contact resistance and increases the risk of a shock.
Of the two classes of radiation, which is the one that can damage living cells? Give two
examples. - ANSWERIonizing radiation. Examples: X-rays or Gamma-rays.
,Which of the following operations emits this type of radiation?
a) shielded metal arc welding
b) arc cutting
c) radiography of welds
d) resistance welding - ANSWERc) radiography of welds
Is it true that you could suffer from "sunburn" on exposed skin by just being near a
welding arc? - ANSWERYes, true.
What is the suggested shade number for a welder's helmet when using 5/32 in SMAW
electrode at 150A? - ANSWER10
Which of the following situations is most likely to produce the greatest amount of direct
and reflected ultraviolet light?
a) resistance welding two thin steel sheets
b) gas metal arc welding aluminium plate
c) submerged arc welding - ANSWERb) gas metal arc welding aluminium plate
True or False? Facepiece respirators with mechanical filters will remove all fumes and
gases emitted in welding. - ANSWERFalse, Gases are not removed. Most fumes will be
removed but not 100%
Approximately how far could spatter travel when welding or cutting on structure about
2.5 m high?
a) Possibly up to 6 m
b) no more than 1 m
c) up to 20 m - ANSWERa) Possibly up to 6 m
What is the suggested shade number for a welder's helmet when using >1/4 in SMAW
electrode at 500A? - ANSWER11
What is the suggested shade number for a welder's helmet when using 3 in SMAW
electrode at 150A? - ANSWER8
, What is the suggested shade number for a welder's helmet when using < 3/32 in SMAW
electrode at 50A? - ANSWER7
What is the suggested shade number for a welder's helmet when using
GMAW/FCAW/MCAW at 60-500A? - ANSWER10
What is the suggested shade number for a welder's helmet when using GMAW at <60
A? - ANSWER7
What is the suggested shade number for a welder's helmet when using GTAW at <50-
150 A? - ANSWER8
What is the suggested shade number for a welder's helmet when using GTAW at 150-
500 A? - ANSWER10
What is the suggested shade number for a welder's helmet when air carbon arc cutting
light at <500 A? - ANSWER10
What is the suggested shade number for a welder's helmet when air carbon arc cutting
heavy at 500 - 1000 A? - ANSWER11
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging very light at 20 A? - ANSWER5
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging light at 20 - 100 A? - ANSWER8
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging medium at 100 - 400 A? - ANSWER8
What is the suggested shade number for a welder's helmet when plasma arc cutting
and gouging heavy at 400 - 800 A? - ANSWER10
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (light) of <25mm/ <1in? - ANSWER3
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (medium) of 25-100mm/ <1-6in? - ANSWER4
What is the suggested shade number for a welder's helmet when oxygen cutting at plate
thickness (heavy) of >150mm/ >6in? - ANSWER5
For the SMAW process, which contributes more to the production of fume: base metal
or electrode? - ANSWERelectrode
Some copper alloys contain a very toxic component. What is it? - ANSWERBeryllium
