Welding Quiz
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- 1.The gas metal arc welding process is also known as:
- A.
Shielded metal arc welding.
- B.
Flux cored arc welding.
- C.
MIG welding.
- D.
Self-shielding process
- 2.Ideally, a welding power source should be located in:
- A.
The centre area of the shop.
- B.
A confined area at floor level.
- C.
An uncluttered, well ventilated area of the shop.
- D.
An unventilated, specially enclosed mezzanine area.
- 3.Moisture and dirt on the surface of the wire electrode is likely to cause:
- A.
Post-weld stress cracking
- B.
Cold lap.
- C.
Porosity.
- D.
Electrical shock
- 4.When arc hunting occurs, the problem is likely in the:
- A.
Drive rolls or the remote control switch.
- B.
Wire feeder drive motor or the motor gearbox.
- C.
Contact tip or the conduit liner.
- D.
Wire speed control or the voltage control.
- 5.Stubbing is caused by excessive:
- A.
Resistance.
- B.
Voltage.
- C.
Inductance.
- D.
Wire feed speed.
- 6.How will penetration be affected when stickout is increased?
- A.
Will decrease penetration
- B.
Penetration will not be affected
- C.
Will increase penetration
- D.
Will affect penetration on groove welds only
- 7.Excessive spatter buildup in the gun nozzle can cause:
- A.
Undercut at the weld edges.
- B.
Inadequate gas coverage.
- C.
Excessive metal flow.
- D.
An increase in stickout.
- 8.What can result from a poor work lead connection?
- A.
Erratic wire feed speeds.
- B.
Excessive penetration.
- C.
An unstable arc.
- D.
Overheating of the power source main transformer coil.
- 9.A gas flow meter must be installed in what position?
- A.
Horizontal
- B.
At a 45 degree angle
- C.
Vertical
- D.
On an incline
- 10.Which GMAW mode of metal transfer is best suited for all-position welding?
- A.
Spray arc transfer
- B.
Pulsed spray arc transfer
- C.
Globular transfer
- D.
Submerged arc transfer
- 11.The purpose of a flowmeter is to:
- A.
Reduce source pressure to working pressure.
- B.
Maintain a constant pressure of gas.
- C.
Maintain a post flow of gas.
- D.
Maintain a constant flow of gas.
- 12.Which gas is the lightest?
- A.
Argon
- B.
Hydrogen
- C.
Helium
- D.
Oxygen
- 13.Argon and helium are:
- A.
Inert gases
- B.
Ionized gases
- C.
Reactive gases
- D.
Explosive gases
- 14.When 1% to 5% oxygen is added to argon shielding gas, it is to:
- A.
Reduce welding costs.
- B.
Improve wetting action.
- C.
Reduce deposition rate
- D.
Reduce splatter
- 15.Compared to CO2, argon is an excellent shielding gas for GMAW because it allows the use of:
- A.
Spray metal transfer.
- B.
Globular metal transfer.
- C.
Short-circuit metal transfer.
- D.
Low gas flow rates in globular transfer.
- 16.With GMAW wire, cast refers to the:
- A.
Ability of the wire to be pushed through a plastic liner.
- B.
Method of forming the wire
- C.
Circle formed by one wrap of the wire.
- D.
Natural twisting action of the wire during forming.
- 17.Which organizations have written specifications for GMAW filler metals?
- A.
WCB and CSA
- B.
CWB and AWS
- C.
ASME and CWB
- D.
AWS and CSA
- 18.When wires are packaged in sealed containers, it is mainly to protect them from:
- A.
Transportation damage.
- B.
Smoke and fumes
- C.
Moisture contamination
- D.
Ultraviolet light radiation.
- 19.Excessive drag from a dirty liner is likely to cause:
- A.
Excessive undercut or lack of fusion
- B.
Porosity and cracking in the weld.
- C.
Damage to the liner and contact tip.
- D.
Slippage or bird nesting at the drive rolls.
- 20.Excessive penetration in a localized area of a metal is referred to as:
- A.
Under-cutting
- B.
Burn-through
- C.
Inclusion
- D.
Slope
- 21.The melting together of metals is referred to as:
- A.
Fusion
- B.
Inclusion
- C.
Stubbing
- D.
Porosity
- 22.The natural twisting action of the wire during forming is referred to as what?
- A.
Curling
- B.
Spiraling
- C.
Helix
- D.
Rotation
- 23.The use of shielding gases for GMAW increases the need for:
- A.
Good lighting.
- B.
Good heat shielding.
- C.
Better eye protection.
- D.
Good ventilation.
- 24.High ultraviolet radiation emissions from GMAW can cause atmospheric oxygen in the vicinity of the arc to convert to:
- A.
Ozone
- B.
Carbon monoxide
- C.
Carbon dioxide
- D.
Helium
- 25.A potential source of poisonous chemical fume when welding is:
- A.
Anti-spatter nozzle sprays.
- B.
Chlorinated degreasing solvents.
- C.
Carbon dioxide extinguishers.
- D.
Inert shielding gases
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