GMAW: chapter 11 review questions -7th
Edition by Larry Jefuss
1. What items make up the basic semiautomatic welding system?
Correct Answer:
The basic semiautomatic welding system includes an automatic machine guide that can be
controlled by a set program and the whole set of welding machine components. This means
the system consists not only of the welding power source but also the wire feeder, the welding
gun, and a programmable guide that controls the welding operation to ensure consistent and
efficient welding.
2. What must be done to the shielding gas cylinder before the cap is removed?
Correct Answer:
Before removing the cap, you must make sure that the cylinder is chained securely. This is
crucial to prevent the heavy gas cylinder from tipping over or falling, which can cause dangerous
accidents or damage. Securing the cylinder protects both the operator and the equipment.
3. Why is the shielding gas valve "cracked" before the flowmeter regulator is
attached?
Correct Answer:
The valve is "cracked" (opened briefly) to blow out any dirt or debris inside the valve. This
prevents contaminants from entering the flowmeter or the welding torch, which could block gas
flow or damage equipment.
4. What causes the electrode to bird-nest?
Correct Answer:
Bird-nesting occurs when the feed roller pushes the wire into a tangled ball because the wire
cannot pass smoothly through the outside feed conduit. This happens if the wire is caught,
kinked, or if the conduit is damaged or misaligned, causing the wire to coil up improperly.
, 5. Why must all fittings and connections be tight?
Correct Answer:
All fittings and connections must be tight to prevent gas or electrical leakage. Leaks in the
shielding gas line can reduce gas coverage, leading to poor weld quality and increased spatter.
Electrical leaks can cause unsafe operating conditions.
6. What can be done to determine the location of a problem that stops the wire
from being successfully fed through the conduit?
Correct Answer:
You can mark the wire with tape and then remove it from the gun. By seeing where the tape
mark stops, you can identify the exact point where the wire feed is being obstructed, allowing
you to troubleshoot the issue more effectively.
7. What is the advantage of using feed roller pressure that is as light as possible?
Correct Answer:
Using light feed roller pressure ensures that the wire feed will stop if something like clothing
or hoses get caught in the reel. This prevents wire damage and potential injury or equipment
malfunction by avoiding excessive force on the wire.
8. Why should the feed roller drag prevent the spool from coasting to a stop
when feeding stops?
Correct Answer:
Because if the spool continues to coast, the wire can be snagged easily, causing tangles or
damage to the wire feed system. Drag on the feed roller helps maintain control over wire
movement and prevents uncontrolled wire feed.
9. Why must you wind the wire tightly into a ball or cut it into short lengths
before discarding it in the proper waste container?
Correct Answer:
Loose wires present a hazard to safe movement around the machine because they can cause
Edition by Larry Jefuss
1. What items make up the basic semiautomatic welding system?
Correct Answer:
The basic semiautomatic welding system includes an automatic machine guide that can be
controlled by a set program and the whole set of welding machine components. This means
the system consists not only of the welding power source but also the wire feeder, the welding
gun, and a programmable guide that controls the welding operation to ensure consistent and
efficient welding.
2. What must be done to the shielding gas cylinder before the cap is removed?
Correct Answer:
Before removing the cap, you must make sure that the cylinder is chained securely. This is
crucial to prevent the heavy gas cylinder from tipping over or falling, which can cause dangerous
accidents or damage. Securing the cylinder protects both the operator and the equipment.
3. Why is the shielding gas valve "cracked" before the flowmeter regulator is
attached?
Correct Answer:
The valve is "cracked" (opened briefly) to blow out any dirt or debris inside the valve. This
prevents contaminants from entering the flowmeter or the welding torch, which could block gas
flow or damage equipment.
4. What causes the electrode to bird-nest?
Correct Answer:
Bird-nesting occurs when the feed roller pushes the wire into a tangled ball because the wire
cannot pass smoothly through the outside feed conduit. This happens if the wire is caught,
kinked, or if the conduit is damaged or misaligned, causing the wire to coil up improperly.
, 5. Why must all fittings and connections be tight?
Correct Answer:
All fittings and connections must be tight to prevent gas or electrical leakage. Leaks in the
shielding gas line can reduce gas coverage, leading to poor weld quality and increased spatter.
Electrical leaks can cause unsafe operating conditions.
6. What can be done to determine the location of a problem that stops the wire
from being successfully fed through the conduit?
Correct Answer:
You can mark the wire with tape and then remove it from the gun. By seeing where the tape
mark stops, you can identify the exact point where the wire feed is being obstructed, allowing
you to troubleshoot the issue more effectively.
7. What is the advantage of using feed roller pressure that is as light as possible?
Correct Answer:
Using light feed roller pressure ensures that the wire feed will stop if something like clothing
or hoses get caught in the reel. This prevents wire damage and potential injury or equipment
malfunction by avoiding excessive force on the wire.
8. Why should the feed roller drag prevent the spool from coasting to a stop
when feeding stops?
Correct Answer:
Because if the spool continues to coast, the wire can be snagged easily, causing tangles or
damage to the wire feed system. Drag on the feed roller helps maintain control over wire
movement and prevents uncontrolled wire feed.
9. Why must you wind the wire tightly into a ball or cut it into short lengths
before discarding it in the proper waste container?
Correct Answer:
Loose wires present a hazard to safe movement around the machine because they can cause
