What Problems May Result By Using An Electrode At Too Low A Current Setting?

What problems may result by using an electrode at too low a current setting?

poor fusion and poor arc stability

.

What problem may result by using an electrode at too high of a current setting?

The weld is the result of too much current. When the amperage is set too high,

the puddle will be excessively fluid and hard to control

. This can lead to excess spatter and higher potential for undercut.

What are the effects of too high or too low current setting?

Voltage that is too high can cause

premature failure of electrical and electronic components

(e.g. circuit boards) due to overheating. The damage caused by overheating is cumulative and irreversible.

What are some problems that may arise as a result of using an electrode that is too large or too small for a given amperage range?

Small diameter electrodes will make acceptable welds on thick plate, but more time is required to make the weld

. Large diameter electrodes may overheat the metal if they are used with thin or small pieces of metal.

What problems may result by using too low amperage?

If the voltage is too low, the amperage increases, which may result in the

components melting down or causing the appliance to malfunction

. If the voltage is too high, this will cause appliances to run ‘too fast and too high' which will shorten their service life.

Why shielded electrodes are used?

6.10.

Shielded metal arc welding (SMAW), also known as manual metal arc welding, is a manual arc welding process that uses a consumable and protected electrode. As

the electrode melts, a cover that protects the electrode melts and protects the weld area from oxygen and other atmospheric gases

.

What is the correct motion for cutting?

The knife should perform

a rocking motion

during cutting: the front top portion of the blade should stay on the cutting board during all times when cutting (or at least the majority of the cutting time), and the rest of the blade should go up and down.

What factors must be taken into consideration when selecting an electrode?

• Base metal properties.
• Tensile strength.
• Welding current.
• Base metal thickness, shape and joint fit-up.
• Welding position.
• Specification and service conditions.
• Environmental job conditions.

What is the most difficult weld to make?

TIG

is the most difficult form of welding for a number of reasons, including being a tedious process and it is harder to master than other forms of welding.

What is the importance of correct electrode angle?

The electrode angle is of particular importance in fillet welding and deep groove welding. Generally speaking, when making a fillet weld, the electrode should be held so that

it bisects the angle between the plates and is perpendicular to the line of weld

.

What is the effect of long arc?

Normal penetration

.

More penetration

.

Less penetration

.

Less weld deposit

.

What are the two methods of striking an arc?

• Scratching.
• Tapping.

What controls the maximum gap the electrons can jump to form the arc?

Voltage

controls the maximum gap the electrons can jump to form the arc. A higher voltage can jump a larger gap.

How do you deal with low voltage?

1. General power outage. Take the time to check lights and appliances throughout the house.
2. Specific circuit tripped. Go to your fuse or breaker box to make sure the problem doesn't lie with blown fuse or tripped breaker.
3. Tripped switch or outlet. …
4. The cord. …
5. Burned-out bulb.

What happens if amperage is too high?

If

an incorrect voltage is used

— say a higher voltage than the device is rated to accept — then yes, too many amps may be drawn and the device can be damaged. This is why it's critical to use the correct voltage.

Is higher or lower amps better?

A higher voltage system is

more efficient than a lower voltage

since it experiences less energy loss from resistance given the same amount of power draw. … You get the same exact voltage—but with 80 amps of current. That's 80% more energy!