Sem 1 Review Question Preview (ID: 45197)


Test 1. TEACHERS: click here for quick copy question ID numbers.

_____ arc welding consists of a spool of hollow wire filled with flux that is fed through the gun. This process does not require external shielding gas. It is commonly used to weld carbon, low-alloy and stainless steels, and cast iron.
a) flux core
b) submerged arc
c) MIG
d) TIG

a check valve/flash arrestor allows the flow of liquid or gas in one direction only
a) True
b) False
c)
d)

The ______ welding process does not use shielding gas to protect the weld area. In this automated process, the electrode, arc, and weld pool are submerged in a granular flux that is poured on the base metal.
a) submerged arc
b) flux core
c) MIG
d) TIG

has a very distinctive, nauseating odor
a) acetylene
b) oxygen
c) hydrogen
d) argon

is caused by the flame going out suddenly on the torch
a) backfire
b) hot start
c) porosity
d) harsh flame

The four basic welding positions are
a) flat, horizontal, vertical, overhead
b) edge, butt, vertical, overhead
c) flat, horizontal, vertical, upside down
d) flat, horizontal, angle, overhead

The cylinder valve is cracked to remove debris (dust, chips) lodged in the outlet nozzle
a) True
b) False
c)
d)

is caused by insufficient gas flow to the welding torch
a) popping
b) backfire
c) holes in weld
d) overheat

When backhand welding, the torch angle is approximately ____° above the plate
a) 60
b) 45
c) 80
d) 30

is used to remove slag after the weld is deposited
a) slag hammer
b) screwdriver
c) your hand
d) pliers

determines whether current flows into the workpieces or toward the electrode in a DC circuit
a) polarity
b) current
c) flash suppressor
d) amps

When welding with DCEP, electron flow from the _______ to the _______
a) workpiece, electrode
b) electrode, workpiece
c) clamp, stinger
d) stinger, clamp

________ changes AC current from one level to another
a) transformer
b) converter
c) voltage
d) current

The correct diameter filler metal is approximately _________ the thickness of the base metal
a) equal to
b) less than
c) more than
d) double

is the amount of electron flow through an electrical circuit
a) current
b) polarity
c) frequency
d) transformer

Torch technique is determined by metal ____ or by depth of bevel
a) thickness
b) angle
c) type
d) color

provides an extra boost of current to help establish an arc when using electrodes that are hard to start
a) hot start
b) current
c) polarity
d) frequency

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