Deck 8: Shielded Metal Arc Equipment, Setup, and Operation

Question 1

Inverter welding machines are adjusted by turning a hand wheel that moves the internal parts closer together or farther apart.

Answer 1

False

Question 2

Inverter welding machines are much smaller than other types of machines of the same ____ range.

A) voltage
B) amperage
C) wattage
D) quality

Answer 2

B

Question 3

Lines of magnetic force are referred to as magnetic strength.

Answer 3

False

Question 4

The amount of heat produced by the arc is determined by the wattage.

Question 5

The terms welding cables or welding leads are used to mean the same thing.

Question 6

Open circuit voltage is the voltage at the electrode after striking an arc.

Question 7

It is possible for alternators and generators to both use ____ to change the AC to DC for welding.

A) coupling
B) resistance
C) diodes
D) valves

Question 8

SEAW is a welding process that uses a flux-covered metal electrode to carry an electrical current.

Question 9

The temperature of a welding arc is dependent on the voltage, arc length, and ____.

A) filler
B) pressure
C) weight
D) atmosphere

Question 10

In direct-current electrode positive, the electrode is positive, and the work is negative.

Question 11

The duty cycle is the percentage of time a welding machine can be used ____.

A) to work safely
B) to tack weld
C) on steel
D) continuously

Question 12

The major classifications for welding machines are multiple coil, movable coil, and ____.

A) inverter type
B) extension type
C) gauntlet type
D) spec type

Question 13

Watts are calculated by multiplying voltage times ____.

A) amperes
B) coulombs
C) diodes
D) temperature

Question 14

The operating voltage will vary with arc length, type of electrode being used, type of current, and ____.

A) covalency
B) shielding gas
C) postpurge time
D) polarity

Question 15

Engine-powered generators are widely used for ____.

A) thick metal parts
B) portable welding
C) light-gauge metal joints
D) welding fabrication

Question 16

Before the invention of the inverter-type welder, each type of welding required a separate machine.

Question 17

____ machines may have a large number of fixed amperes.

A) Movable coil
B) Multiple-coil
C) Movable core
D) Inverter type

Question 18

In ____, the electrode is negative, and the work is positive.

A) DCEP
B) DCRP
C) DCEN
D) AC

Question 19

A rectifier allows a current to flow in one direction only.

Question 20

Voltage is the measurement of electrical pressure in the same way that pounds per square inch is a measurement of water pressure.

Question 21

An electric current is the flow of ____________________.

Question 22

The SMA welding machines' voltage ____________________ decreases as current increases.

Question 23

In alternating current, the electrons change direction every 1/120 of a second so that the electrode and work alternate from anode to ____________________.

Question 24

Amperage controls the size of the ____________________.

Question 25

All transformers have the following three major components: the primary coil, secondary coil, and ____________________.