120103a Lyles review moved Flashcards
The gas metal arc welding process is sometimes called:
A) MIG welding
B) flux cored welding
C) self-shielding process
D) shielded metal arc welding
C) self-shielding process
Which welding process is not classified as a continuous wire feed system?
A) GMAW
B) SMAW
C) FCAW
D) SAW
A) GMAW
The name for an arc welding process that uses a solid continuous wire and an inert shielding gas is:
A) tungsten inert gas
B) shielded metal arc welding
C) gas metal arc welding
D) flux cored arc welding
GMAW welding does NOT:
A) require the use of a shielding gas
B) reduce clean up cost
C) have a fast metal deposit
D) use a flux around the electrode
GMAW CANNOT be used on:
A) aluminum and magnesium
B) mild steel and stainless steel
C) stainless, carbon and low alloy steels
D) zinc diecast
D) zinc diecast
One disadvantage of GMAW iS:
A) equipment is inexpensive
B) the equipment requires more maintenance
C) thin metal may be welded
D) an operator can learn to MIG weld more quickly
B) the equipment requires more maintenance
FCAW uses two variations in the process. What are they?
A) self shielded and gas shielded
B) short circuit and globular
C) globular and spray
D) buried arc and spray
A) self shielded and gas shielded
Under what conditions can the FCAW process be used without the addition of externally applied shielding gas?
A) while working indoors with little air movement
B) on mild steels with less than 0.35% carbon content
C) when welding on high manganese crusher rolls
D) when using a self shielded tubular flux filled electrode
D) when using a self shielded tubular flux filled electrode
Which of the listed items is NOT a basic requirement for GMAW?
A) shielding gas
B) wire feeder
C) gun and cable assembly
D) tungsten wire
D) tungsten wire
The type of current used for most GMAW applications is:
A) AC (alternating current)
B) DCRP (direct current - reverse polarity)
C) DCSP (direct current - straight polarity)
D) AC (with high frequency on continuous)
B) DCRP (direct current - reverse polarity)
When a constant current (CC) power source is used for GMAW it should be set:
a) direct current - reverse polarity
b) direct current - straight polarity
c) alternating current - either polarity
d) alternating current - no fixed polarity
a) direct current - reverse polarity
The polarity used for most applications in the GMAW process is:
a) DC reverse
b) DC straight
c) AC straight
d) AC reverse
a) DC reverse
The FCAW flowmeter is designed to measure:
A) pressure of the gas
B) speed of the gas
C) temperature of the gas
D) volume of the gas being used
D) volume of the gas being used
Short circuiting mode of metal transfer requires a:
a) CC machine and high voltage settings
b) CV machine and small diameter wires
c) CP machine and high voltage settings
d) AC machine and large diameter wires
b) CV machine and small diameter wires
What is an advantage of GMAW, when compared to SMAW?
A) it takes less experience to set up the machine
B) there is less electrode waste
C) the weld can be done outdoors
D) large diameter rods can be used
B) there is less electrode waste
As compared to SMAW, GMAW can increase:
A) cost
B) work
C) safety
D) productivity
D) productivity
One disadvantage of GMAW is:
A) equipment is inexpensive
B) welds are more prone to lack of fusion
C) thin metal may be welded
D) an operator can learn to MIG weld more quickly
B) welds are more prone to lack of fusion
Which power source and feeder combination would be recommended for gas-shielded FCAW?
A) constant current and arc voltage sensing control
B) constant potential and voltage sensing feeder
C) constant current and constant speed control
D) constant potential and constant speed feeder
D) constant potential and constant speed feeder
Which power source is most commonly used for self-shielding flux core arc welding?
A) constant current and arc voltage sensing control
B) constant potential and voltage sensing control
C) constant voltage and constant wire speed control
D) constant current and amperage control
A) constant current and arc voltage sensing control
The amperage is set on a constant voltage (CV) welding machine while using FCAW:
A) with the wire speed control
B) with the dial on the welding machine
C) with the stick out length
D) with the contact tube
A) with the wire speed control
What is considered FCAW’s main advantage(s)?
A) its lack of shielding gas requirements with all wires
B) its high deposition rate
C) it has less complicated equipment than SMAW
D) all of the above
B) its high deposition rate
A disadvantage of FCAW is
A) equip is cheap and easy to set up and maintain
B) it can generate large amounts of smoke
C) there is no slag to remove
it can be run at a great distance from the wire feeder
B) it can generate large amounts of smoke
Why might you choose FCAW over other welding processes?
A) good weld appearance
B) high quality weld deposits
C) resistance to underbead cracking
D) all of the above
D) all of the above
List why you would NOT use FCAW processe(s)
A) slag removal is required
B) equipment is more costly than for SMAW
B) limited to welding ferrous metals and nickel based aloys
D) all of the above
D) all of the above
Constant voltage (CV) machines produce a:
a) drooping volt-amp curve
b) rising volt-amp curve
c) relatively flat volt-amp curve
d) constantly changing volt-amp curve
c) relatively flat volt-amp curve
The power source least suited for the short circuit method of welding is a:
a) CV machine
b) AC machine
c) CC machine
d) An inverter
b) AC machine
The power source best suited for the short circuit method of welding is a:
a) rising voltage power source
b) constant voltage power source
c) constant current power source
d) constant amperage power source
b) constant voltage power source
Which current type is generally used with the GMAW process?
a) DCEN
b) ACHF
c) DCSP
d) DCEP
d) DCEP
A constant potential power source can also be referred to as a:
a) constant voltage machine
b) constant amperage machine
c) constant current machine
d) constant resistance machine
a) constant voltage machine
From these power sources, select the one recommended for GMAW:
a) AC
b) DC constant current
c) AC reverse polarity
d) DC constant voltage
d) DC constant voltage
What type of power source would be best suited for GMAW welding?
a) constant current machines
b) motor generator machines
c) constant voltage machines
d) ac/dc transformer rectifier machines
c) constant voltage machines
In applications where gas metal arc processes are the only processes used, the power source type should be:
a) conventional AC
b) constant potential
c) conventional CC
d) a drooping curve
b) constant potential
The recommended power source and volt-amp curve setting for short circuiting GMAW is:
a) CC moderately drooping
b) CV relatively flat
c) CV relatively steep
d) RAV slightly rising
b) CV relatively flat
What controls amperage in GMAW?
a) voltage
b) diameter of wire
c) watts
d) wire feed speed
d) wire feed speed
A welding machine that produces a relatively flat volt/amp curve is a:
a) constant current machine
b) constant voltage machine
c) rising arc voltage machine
d) high potential welding machine
b) constant voltage machine
Which parameter remains relatively constant while welding with a constant voltage welding machine
A) voltage
B) amperage
C) current
D) resistance
A) voltage
The voltage is set on a constant voltage (CV) welding machine:
A) voltage cannot be set on a CV powere source
B) by changing the length stick out
C) by manipulating the voltage dial on the power source
D) by manipulating the wire feed dial on the power source
C) by manipulating the voltage dial on the power source
A machine with a relatively fat volt amp curve would be best suited for:
a) PAW
b) SMAW
c) GMAW
d) GTAW
c) GMAW
GMAW Welding machines are constucted to specifications set by?
a) AMSE
b) ASTM
c) NEMA
d) FUBAR
c) NEMA
What color and type of clothing is best suited for the GMAW processes?
a) light colored wool shirts and leather gloves
b) light colored long sleeved shirts leather gloves
c) dark colored nylon shirts and leather gloves
d) dark colored long sleeved shirts and leather gloves
d) dark colored long sleeved shirts and leather gloves
High ultraviolet emissions from GMAW will cause oxygen in the air to convert to:
a) ozone
b) carbon monoxide
c) carbon dioxide
d) argon
a) ozone
One reason good ventilation is required for GMAW is to prevent:
a) loss of shielding gas
b) overheating of the weld
c) build-up of metal particles
d) oxygen deficiency
d) oxygen deficiency
A potential source of poisonous chemical exposure in welding is:
a) shielding gases
b) degreasers
c) carbon dioxide extinguishers
d) anti-spatter sprays
b) degreasers
- Water cooled guns are best suited for GMAW when using:
a) low voltage and low amperage
b) high voltage and low amperage
c) low voltage and high amperage
d) high voltage and high amperage
d) high voltage and high amperage
The preferred way of measuring shielding gas flow is:
A) pounds per square inch (kilograms per square centimeter)
B) pounds per hour (kilograms per minute)
C) cubic feet per hour (liters per minute)
D) surface feet per hour (surface meters per minute)
C) cubic feet per hour (liters per minute)
Shielding gas flow is measured in:
A) PSI
B) CFH
C) SFM
D) RPM
B) CFH
The shielding gas flow valve is operated by a:
A) toggle switch
B) solenoid
C) pressure relief valve
D) foot control
B) solenoid
What is a gas solenoid?
A) an impurity in the shielding gas
B) the process for making shielding gas
C) an unused waste gas from the production of shielding gases
D) an electrically operated valve to control shielding gas flow to the weld
D) an electrically operated valve to control shielding gas flow to the weld
The self-shielded flux cored arc welding process might be chosen because it does NOT require
A) a high output welding machine
B) an experienced operator
C) expensive equipment
D) the expense of a shielding gas
D) the expense of a shielding gas
One of the functions of the inner core in gas-shielded FCAW wire is to:
A) provide deoxidizers to the weld
B) lower weld temperature
C) decrease flow rate
D) increase penetration
A) provide deoxidizers to the weld
