SMAW Flashcards
201a
Which term describes the voltage output of the machine while you’re welding?
a) Arc rectification
b) Arc blow
c) Arc voltage
d) Inductance
c) Arc voltage
201a
What do you create when current flow’s through a coil wrapped around an iron core?
a) A magnetic field
b) Reverse polarity
c) A transformer rectifier
d) A duty cycle
a) A magnetic field
201a
Manufacturer’s design this device in a welding machine to have a certain number of turns of wire
a) Circuit
b) Core
c) Coil
d) Cycle
c) Coil
201a
The main function of which device is to change AC to DC
a) Resistor
b) Rectifier
c) Relay
d) Reactor
b) Rectifier
201a
Which term describes the NEMA rating of a welding machine
a) Duty cycle
b) Direct current
c) Arc voltage
d) Amperage
a) Duty Cycle
201a
Which term describes the influence that a magnetic field exerts on a neighboring body without physical contact
a) Voltage
b) Amperage
c) Frequency
d) Inductance
d) Inductance
201a
Electrode negative is:
a) Straight polarity
b) Reverse polarity
c) AC transformer
d) Alternating current
a) Straight polarity
201a
Which term describes a noisy, uncontrollable arc that flares from side to side?
a) Arc voltage
b) Arc blow
c) Inductance
d) Resistance
b) Arc blow
201a
Which term describes a medium that provides an electrical path through which current can flow
a) Cycle
b) Circuit
c) Conductor
d) Core
c) Conductor
201a
Which current flows in one direction only and has either a positive or negative value?
a) Direct current
b) Alternating current
c) Open circuit voltage
d) Arc voltage
a) Direct current
201a
Which of the following is a graphical illustration that plots the relationship between voltage and amperage output of a welding power source
a) Open circuit voltage
b) Electromotive Force (EMF)
c) Volt-amp curve
d) Duty cycle
c) Volt-amp curve
201a
Which term expresses the strength of a current of electricity
a) Amperage
b) Voltage
c) Electron
d) Conductor
a) Amperage
201a
When no current is flowing in the circuit, but the machine is on, you can measure the:
a) Constant current
b) Open circuit voltage
c) Alternating current
d) Volt-amp curve
b) Open circuit voltage
201a
The speed at which AC changes direction is the:
a) Voltage
b) Amperage
c) Frequency
d) Resistance
c) Frequency
201a
In welding, what do you create when enough amperage and voltage exists to overcome the natural resistance to the flow of electricity
a) Amp
b) Volt
c) Cycle
d) Arc
d) Arc
201a
For what does EMF stand?
a) electron movement force
b) elementary motor force
c) electromotive force
d) electromotive factor
c) Electromotive force
201a
Which term describes a material that can stop current flow through itself
a) Inductor
b) Inverter
c) Conductor
d) Insulator
d) Insulator
201a
Electrode positive means:
a) Straight polarity
b) Reverse polarity
c) AC transformer
d) Alternating current
b) reverse polarity
201a
Which term describes the typical sound of an AC transformer type welding machine
a) turbine whine
b) high pitched scream
c) buzz box
d) whisper quiet
c) buzz box
201a
This type of welding machine is capable of changing DC to HF-AC
a) AC generator
b) DC rectifier
c) DC generator
d) Inverter
d) Inverter
201a
Which is the largest cable size?
a) 4
b) 2
c) 2/0
d) 4/0
d) 4/0
201a
Which size of welding cable offers the most resistance to current flow?
a) 4
b) 2
c) 2/0
d) 4/0
a) 4
201a
Overheating of the cable connections can result from:
a) Poor work lead connection
b) Using excessively long electrodes
c) Welding overhead instead of flat or horizontal
d) Using a permanently fixed work lead connection
a) Poor work lead connection
201a
How do you relate electrode holders
a) by voltage carrying capacity
b) by maximum electrode size
c) by amperage carrying capacity
d) by the size of welding cable
c) By amperage carrying capacity
201a
Loose work lead connections when using SMAW may cause
a) Electrical shock
b) Magnetic arc blow
c) High burn-off rates
d) Arcing at the work clamp
d) Arcing at the work clamp
201a
An advantage to using a magnetic work lead device over a spring loaded clamp is that the magnetic connection
a) Effectively prevents arc blow
b) Less likely to damage work piece
c) Permanently attached connection
d) Can attach to all metals
b) Less likely to damage work piece
201a
If the size of the welding cable from the machine is size 1/0, then the whip cable should be what size?
a) 4/0
b) 3/0
c) 2/0
d) 2
d) 2
201a
What is the approx. length of a normal arc weld
a) O.D of electrode
b) Half the thickness of base metal
c) Twice the thickness of the core wire
d) Same as diameter of the core wire
d) Same as diameter of the core wire
201a
What happens when you increase the arc length
a) Amps increase, volts increase
b) Amps decrease, volts increase
c) Amps increase, volts decrease
d) Amps decrease, volts decrease
b) Amps decrease, volts increase
201a
What happens when you decrease the arc length
a) deep pen. as well as narrow bead with more build up
b) deep pen. shallow bead with less build up
c) shallow pen. wide bead with less build up
d) no change in the weld
a) Deep pen. as well as narrow bead with more build up.
201b
The ability of a metal to permanently deform under load without breaking is known as:
a) ductility
b) brittleness
c) toughness
d) elasticity
a) ductility
201b
The ultimate pull that a material can withstand is called:
a) yield strength
b) tensile strength
c) ductility
d) elasticity
b) tensile strength
201b
Impact tests, such as izod or charpy, are designed to measure
a) weld metal’s hardness
b) weld metal’s ductility
c) ability of the weld to withstand abrasion
d) weld’s impact strength
d) impact strength
201b
The point at which a material begins to deform permanently underload is called its:
a) yield point
b) ultimate tensile strength
c) ductile fracture point
d) brittleness limit
a) yield point
201b
Dynamically loaded structures are subject to:
a) constant pressure
b) reversals of stress
c) loads that do not impact
d) stationary loading conditions
b) reversals of stress
201b
Best example of a dynamically loaded structure
a) pillars supporting the roof of a steel oil storage tank
b) columns supporting the wall in a building
c) boom on a crane making a lift and then swinging the load
d) base plate on a stationary pipe rack
c) boom on a crane making a lift and then swinging the load
201b
Which is the best example of a statically loaded structure
a) boom on a crane lifting and swinging a load
b) frame of a loaded and moving gravel truck
c) air compressor receiver tank
d) columns supporting a wall
d) columns supporting a wall
201b
A static load means that the load:
a) shifts quickly from side to side
b) is applied and removed slowly
c) is steady and relatively unchanged
d) subjected to stress reversals or constant vibration
c) steady and relatively unchanged
201b
Electrodes used in SMAW are often called
a) Consumable electrodes
b) Non- consumable electrodes
c) Core wire electrodes
d) Wrapped electrodes
a) Consumable electrodes
201b
In the AWS classification for SMAW mild steel electrodes, what does the last digit represent
a) Type of shielding gas produced by the melting flux
b) The amount of metallic powder that is added to the coating
c) The welding position in which the electrode may be satisfactorily operated
d) The major ingredient in the coating and the recommended current for best results
d) The major ingredient in the coating and the recommended current for best results
201b
Electrode specs. are written by
a) AWS and WCB
b) CSA and NEMA
c) CSA and AWS
d) ASME and NEMA
c) CSA and AWS
201b
What’s 1 difference between a 7010 and 7018?
a) core wire
b) minimum as welded tensile strength
c) coating
d) recommended welding position
c) coating
201b
E7024 electrodes are designed to be used in which positions
a) All (1,2,3,4)
b) Flat and horizontal only (1,2)
c) Flat only (1)
d) Vertical downhill only (3)
b) Flat and Horizontal only (1,2)
201b
What do the first 2 digits in the AWS classification for carbon steel SMAW electrodes represent
a) Current type and application
b) As-welded minimum tensile strength
c) Recommended welding positions
d) Iron powder content of the coating in %
b) As-welded minimum tensile strength
201b
In the CSA numbering system for welding electrodes, what does the prefix letter E represent
a) Electronic
b) Energized
c) Electrode
d) Electromotive force
c) Electrode
201b
Which electrode is restricted to welding in the flat position only
a) 7038
b) 7027
c) 7024
d) 7014
a) E7038
201b
What’s the difference between a E7018 and E7028
a) 7018 has a lime-type coating, 7028 does not
b) 7018 can be used in all positions, 7028 cannot
c) 7018 has metallic powder in the coating, 7028 does not
d) 7018 is for static loading; 7028 is for dynamic loading
b) 7018 can be used in all positions, 7028 cannot
201b
According to the AWS, which number indicates the positions an E7024 can be used in
a) First number
b) Second number
c) Third number
d) Fourth number
c) Third number
201b
Why is iron powder added to the coating of some electrodes
a) To prevent the core wire from rusting
b) To increase the rate of weld deposit
c) To help bind the elements in the coating
d) To decrease the Sulphur content in the weld
b) To increase the rate of weld deposit
201b
The CSA system uses what term to measure tensile strength
a) Kilopascals
b) Joules per sq meter
c) Megapascals
d) Watts per sq meter
c) Megapascals
201b
Which set of characteristics best describes the electrode E4914
a) Mineral coating, 50% metallic powder, AC or DCSP
b) Lime coating, 40% metallic powder, AC or DCRP
c) Rutile coating, 30% metallic powder, AC or DC either polarity
d) Cellulose coating, 10% metallic powder, AC or DCRP
c) Rutile coating, 30% metallic powder, AC or DC either polarity
201b
Which electrode has the least amount of metallic iron powder in it’s coating
a) 6010
b) 7014
c) 7018
d) 7028
a) E6010
201b
What is one purpose of the slag produced from the flux coating on a welding electrode
a) Promote formation of oxides and nitrides in the weld puddle
b) Minimize distortion and prevent undercut and arc blow
c) Prevent formation of a gaseous shield around the molten weld metal
d) To protect the molten weld puddle from atmospheric contamination
d) Protect the molten weld puddle from atmospheric contamination
201b
To weld thin material, you would likely select an electrode with:
a) deep pen. characteristics
b) a large diameter electrode
c) a small diameter electrode
d) a high as welded tensile strength
c) a small diameter electrode
201b
Which electrode has a cellulose coating
a) 6010
b) 6013
c) 7014
d) 7018
a) E6010
201b
What is one function of the slag produced from the electrode coatings
a) Add more nitrogen and oxygen to the weld
b) To help maintain the arc and control penetration
c) To add alloying elements to the weld deposit
d) To prevent the weld from cooling too rapidly
d) To prevent the weld from cooling too rapidly
201b
What is one characteristic of a E6010
a) Deep pen. into the base metal
b) Produces a low hydrogen weld deposit
c) Shallow pen. into the base metal
d) Wide metal flow and very fluid puddle
a) Deep pen. into the base metal
201b
What is the major difference between the coating of an E4310 and an E4311 electrode
a) There is no difference
b) An E4310 requires moisture, but an E4311 does not
c) An 4310 has potassium added as an arc stabilizer for AC welding
d) An 4311 has potassium added as an arc stabilizer for AC welding
d) An E4311 has potassium added as an arc stabilizer for AC welding
201b
What is the major advantage of using an E4310 for the root bead and E4918 electrodes for fill passes on one welded joint
a) Saves money on cost of electrodes because 4310 is cheap
b) It is easier on the welding machine if the amps changes periodically and E4310 uses lower amps
c) It takes advantage of the penetration qualities of the E4310 and the mechanical properties of the E4918
d) It determines if welders can follow procedures before attempting the B-pressure test
c) it takes advantage of 4310 pen. qualities and mechanical properties of E4918
201b
Which electrode contains the highest amount of iron powder in its coating
a) 6010
b) 6011
c) 6013
d) 7014
d) 7014
201b
Which statement is true about the slag produced when welding with a coated electrode
a) It speeds up the freezing rate of the molten metal
b) It helps prevent oxygen and nitrogen from contaminating the weld
c) It speeds up the cooling rate of solidified weld metal
d) It distorts the shape of the deposit if not removed quickly
b) It helps prevent oxygen and nitrogen from contaminating the weld
201b
Which last digit in the classification of a SMAW mild steel electrode describes a flux that is lime based
a) 0
b) 1
c) 4
d) 8
d) 8
201b
Which electrode works best for the root bead on groove welds with an open gap
a) E4313
b) E4928
c) E4310
d) E4924
c) E4310
201b
Adding large amounts of iron powder to electrode coatings would limit welding to which positions
a) overhead
b) vertical
c) flat and horizontal
d) downhill
c) Flat and horizontal
201b
Its important to know the chemical and mechanical properties of the base metal so you can select an electrode with the correct:
a) diameter
b) current requirements
c) length
d) flux coating
d) flux coating
201b
What is the likely effect of using low hydrogen electrodes with a moisture content that exceeds acceptable limits
a) The weld metal will probably have porosity and may develop hydrogen-induced cracking
b) The slag produced will be difficult to remove, resulting in slag inclusions on subsequent passes
c) The excess steam rising out of the protective gaseous shield will make it hard to see the puddle
d) The deposited weld metal will look too much like the deposit of a cellulose- coated electrode
a) Weld metal will probably have porosity and may develop hydrogen- induced cracking
201b
What is the main purpose of keeping low-hydrogen electrodes dry
a) Assist in producing and maintaining a stable, smooth arc
b) Minimize the possibility of hydrogen- induced cracking
c) To increase the electrodes deposition rate
d) To increase the shelf life of the electrodes in storage
b) Minimize the possibility of hydrogen- induced cracking
201b
Proper handling of electrodes includes following the manufacturer’s recommendations regarding:
a) the physical properties of the base metal
b) the core wire diameter of electrode being used
c) welding position and amperage settings
d) storage and reconditioning procedures
d) storage and reconditioning procedures
201b
What is the recommended moisture content for E6010 electrode coatings
a) 0%- 2%
b) 3%- 7%
c) 8%- 10%
d) 11%- 14%
b) 3%- 7%
201b
Which electrode would be the best choice if the base metal properties were unknown
a) E7018
b) E7014
c) E6011
d) E7024
a) E7018
201d
Why is limestone added to the blast furnace
a) to act as a flux to remove impurities
b) to increase the carbon content of the pig iron
c) to reduce the time needed to melt the iron ore
d) to reduce the melting point of the iron ore
a) to act as a flux to remove impurities
201d
The blast furnace is loaded with which materials
a) silicon, iron ore, and coke
b) iron ore, coke, and limestone
c) Sulphur, coke, and limestone
d) iron ore, Sulphur, limestone
b) iron ore, coke, and limestone
201d
In relation to steels, what is coke
a) an element mined from the earth composed of 50% - 70% iron
b) A fuel source made by removing moisture from coal
c) Sedimentary rock used as a flux in the blast furnace
d) a popular soft drink
b) A fuel source made by removing moisture from coal
201d
Cast iron has a high carbon content of 1.7% - 4.5%, its refined from pig iron using what?
a) basic oxygen process
b) electric arc furnace
c) blast furnace
d) a cupola furnace or an induction furnace
d) a cupola furnace or an induction furnace
201d
With the basic oxygen steel making process, what is the purpose of blowing in oxygen
a) to combine with the carbon
b) to oxidize the manganese
c) to turn Sulphur into slag
d) to unite with the pig iron
a) to combine with the carbon
201d
what materials are loaded into the basic oxygen steel making vessel
a) iron ore, limestone, coke
b) limestone and scrap steel
c) iron ore, coke, scrap steel
d) scrap steel, pig iron
d) scrap steel, pig iron
201d
which steel making process is commonly used for making high quality alloy and tool steels
a) a blast furnace
b) a basic oxygen furnace
c) electric arc furnace
d) a cupola furnace
c) Electric arc furnace
201d
What is the normal charge for the electric furnace steel making process
a) iron ore, limestone, and coke
b) carefully selected scrap metals
c) molten iron and limestone
d) iron ore and scrap steel
b) carefully selected scrap metals
201d
what is the end product from the blast furnace
a) stainless steel
b) cast iron
c) iron ore
d) pig iron
d) pig iron
201d
What is the continuous casting process
a) where molten metal is solidified into billets, blooms, blanks, rounds, or slabs
b) where pig iron is refined into cast iron
c) where molten steel is poured into molds
d) where iron ore is turned into pig iron
a) where molten metal is solidified into billets, blooms, blanks, rounds, or slabs
201d
Pig iron is refined to produce either
a) cast iron or steel
b) brass or bronze
c) iron or carbon
d) iron ore or coke
a) cast iron or steel
201d
What is the range of carbon content for cast iron
a) 0.5% - 1.5%
b) 1.5% - 2.5%
c) 2% - 4.5%
d) 4.0% - 7.0%
c) 2% - 4.5%
201d
Which type of steel has a shiny surface
a) hot rolled
b) cold rolled
b) cold rolled
201d
What is the approx. carbon content of low carbon steel
a) .05% - .30%
b) .30% - .45%
c) .45% - .75%
d) .75% - 1.50%
a) .05% - .30%
201d
Which metal leaves the steel-making furnace and is poured into a mold that is in the shape of the final product
a) pig iron
b) cast steel
c) iron ore
d) limestone
b) cast steel
201d
which type of steel is not de-oxidized
a) rimmed
b) semi-killed
c) killed
d) capped
a) rimmed
201d
Based on the deoxidization process, what are the 4 classes steel
a) low carbon, medium carbon, high carbon, very high carbon
b) rimmed, capped, semi-killed, killed
c) ferritic, austenitic, martensitic
d) mild, alloy, heat treatable, extra low carbon
b) rimmed, capped, semi-killed, killed
201d
In general, which type of steel is of the highest quality
a) rimmed
b) semi-killed
c) killed
d) capped
c) killed
201d
Why is a cap or seal used in making capped steels
a) fully deoxidize the molten steel
b) decrease the cooling rate and help prevent gas voids
c) increase the cooling rate and decrease deoxidization
d) to increase the cooling rate and fully deoxidize the steel
b) decrease the cooling rate and help prevent gas voids
201d
Which is true of a semi-killed steel
a) No de-oxidizers are added
b) They’re fully deoxidized
c) A cap or seal is added to the top
d) A small amount of de-oxidizer is added
d) A small amount of deoxidizer is added
201e
what is the carbon content range of low carbon steels
a) .05 - .30%
b) .30 - .45%
c) .45 - .75%
d) .75 - 1.50%
a) .05 - .30%
Punches and dies are made from what class of carbon steel
a) low
b) medium
c) high
d) very high
d) very high
What is the carbon content range of high carbon steels
a) .05 - .30%
b) .30 - .45%
c) .45 - .75%
d) .75 - 1.50%
c) .45% - .75%
Axles and connecting rods are made from what kind of carbon steel
a) low
b) medium
c) high
d) very high
b) medium
What is the carbon content range of very high carbon steels
a) .05 - .30
b) .30 - .45
c) .45 - .75
d) .75 - 1.50
.75 - 1.50
Structural shapes are made from what kind of carbon steel
a) low
b) medium
c) high
d) very high
a) low
what is the carbon content range of medium carbon steel
a) .05 - .30
b) .30- .45
c) .45 - .75
d) .75 - 1.50
b) .30 - .45
leaf springs are made from what kind of carbon steels
a) low
b) medium
c) high
d) very high
c) high
In the SAE or AISI number 1025, the number 25 indicates the :
a) tensile strength of the material
b) percentage of alloy added
c) carbon content in hundredths of 1%
d) Sulphur content of the steel
c) carbon content in hundredths of 1%
The SAE and AISI use the same numbering for what type(s) of steel products
a) automobile frames
b) sheet steel
c) structural steel plates and shapes
d) steel bars
d) steel bars
