Welding textbook CH 5

Which of the following does not describe the actions in a movable coil transformer?

• Moving the primary coil toward the secondary coil decreases current output.

• When the primary and secondary coils are separated, the magnetic field weakens.

• Moving the primary coil away from the secondary coil decreases current output.

• Moving the primary coil toward the secondary coil increases current output.

What information is obtained from the first two or three digits of an AWS electrode classification number?

• The current setting.

• The tensile strength of the electrode.

• The polarity of the electrode.

• The suggested welding position for using the electrode.

The ___ is revealed by the last two digits of the AWS electrode classification number.

• electrode tensile strength

• polarity of the electrode

• the composition of the electrode coating

• the suggested position for welding

The suggested welding position for an electrode is indicated by the ___ digit from the right in the AWS electrode classification.

• 1st

• 2nd

• 3rd

• 4th

A number ___ filter lens is recommended for SMAW.

• 10–14

• 6–8

• 14–18

• 4–8

A "drooper" is a(n) ___ arc welding machine.

• AC

• DC

• constant voltage

• constant current

A DCEP electrode has the same direction of flow as an electrode with a ___ designation.

• DCSP

• DCRP

• DCNP

• DCWP

What duty cycle is recommended for a welding machine that is to be used with automatic or semiautomatic welding?

• 20%

• 50%

• 80%

• 100%

Which of the following is not a power source used for welding?

• Inverter

• Engine driven generator

• Hybrid

• Transformer with a rectifier

Which of the following is not part of the minimum information needed to describe an arc welding power source?

• Weight of transformer

• Type of power source

• Whether output is AC, DC, or both

• Whether output is constant current or constant voltage