Welding blk 6

An alloy with the designation 2024 is a _____

A) Wrought aluminum alloy with magnesium as its major alloying element
B) Wrought aluminum alloy with copper as its major alloying element
C) Cast aluminum alloy with zinc as its major alloying element
D) Cast aluminum alloy with magnesium as its major alloying element

B) Wrought aluminum alloy with copper as its major alloying element

All of the following are nonferrous metals, except _____

A) Zinc
B) Copper
C) Stainless steel
D) Aluminum

C) Stainless steel

Which statement about welding wrought aluminum with GMAW is false?

A) Preheat is usually required
B) Pulsed spray transfer is used for out-of-position joints
C) Welding is done with AC
D) An argon-helium mixture can be used on thick material

C) Welding is done with AC

Which electrode type is not recommended for welding of aluminum using AC?

A) Thoriated
B) Zirconiated
C) Lanthanated
D) Pure tungsten

A) Thoriated

Which elements are alloyed with magnesium to form the most commonly used magnesium alloys?

A) Aluminum and manganese
B) Aluminum and iron
C) Zinc and manganese
D) Aluminum and zinc

D) Aluminum and zinc

Which type of current should be used for gas tungsten arc welding of copper?

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

C) DCEN

A _____ electrode is used for gas tungsten arc welding of titanium

A) EWP
B) EWZr
C) EWTh-2
D) EWTh-1

C) EWTh-2

After ____ Is cleaned for welding, the welder must wear gloves to prevent skin oil from getting on the metal

A) Titanium
B) Copper
C) Magnesium
D) A nickel-based alloy

A) Titanium

Which types of plastics can be welded?

A) Thermoplastics
B) Silicone and epoxy
C) Thermosets
D) All types of plastic can be welded

A) Thermoplastics

Aluminum alloys with four-digit codes are castings

False

Aluminum must be cleaned before welding

True

If a backing strip is to become part of the joint, it must be made of stainless steel

False

Pipe welding aluminum using an open root should be performed using GTAW

True

DCEN current produces good cleaning action on aluminum

False

Deoxidized copper is easier to weld than oxygen-bering copper

True

Nonferrous metals and alloys can contain iron as an alloying element

True

SMAW is the preferred processes for welding copper

False

Preheating is required when thin sheets of copper are welded

False

When copper is welded, preheating requirements for GTAW are higher than those for GMAW

True

Oxyfuel gas processes are recommended for welding bronze

False

When titanium is welded using the GTAW process, DCEP current is used

False

The root side of titanium butt weld requires shielding gas coverage

True

Secondary shielding gas helps preheat and remove oxides from the surface of titanium

False

Nickel-based alloys are used for high-temperature applications

True

When welding plastic, the welder increases the welding gas temperature by increasing the gas flow

False

When plastics are welded, the plastic and filler material are heated by a small flame

False

All forms of aluminum other than cast aluminum are called ______ aluminum

Wrought

The shielding gas used for most aluminum welding is _______

Argon

The current used to resistance weld aluminum is about ______ times the current used to weld a similar thickness of steel

3

Brass is a combination of copper and _____

Zinc

At high temperatures, contamination from impurities such are grease, oil, or moisture can cause titanium to become _____

Brittle

It is necessary to wear a(n) _______ - pressure respirator when entering a gas-filled area

Positive

33-39 refer to study packet

B,G,F,E,D,C,A

The function of the copper shoes during electroslag or electrons welding is to _____

A) Prevent the molten metal from oxidizing
B) Prevent grain growth in the base metal
C) Rapidly cool the molten metal and slag
D) Contain the molten metal and slag

D) Contain the molten metal and slag

A non transferred arc in plasma arc welding is an arc between the electrode and the _____

A) Workpiece connection
B) Constricting nozzle
C) Work surface
D) Shielding gas

B) Constricting nozzle

A problem encountered in narrow groove welding is _____

A) Directing the arc to both sides of the joint
B) Shielding the molten metal from oxygen
C) Selecting the correct alloy electrode
D) Passing the welding current through the electrode

A) Directing the arc to both sides of the joint

In cold welding, explosion welding, and forge welding processes, a(n) ______ is used to join two pieces of metal

A) Explosive
B) Very high temperature
C) Force
D) Beam of energy

C) Force

Electron beam welding yields the best results when the work is done ____

A) At atmospheric pressure
B) In a high vacuum
C) With argon shielding gas
D) In a partial vacuum

B) In a high vacuum

The accelerating voltage on an electron beam welding machine can be as high as ______

A) 200,000 V
B) 75,000 V
C) 175,000 V
D) 25,000 V

A) 200,000 V

Which of the following lasers are commonly used for welding?

A) Ruby lasers and helium neon lasers
B) CO2 lasers and Nd-YAG lasers
C) Titanium-saphire lasers and AC-DC lasers
D) Dye lasers and free-electron lasers

B) CO2 lasers and Nd-YAG lasers

A friction weld typically takes about _____ seconds to complete

A) 15
B) 20
C) 30
D) 60

A) 15

When submerged arc welding is performed with multiple electrodes, which of the following electrode combinations is most often used?

A) Parallel connection transverse position
B) Series connection transverse position
C) Multiple power connection tandem position
D) Multiple power connection transverse position

C) Multiple power connection tandem position

In the electroslag welding process, the molten weld metal is covered by a layer of _____

A) Granular flux
B) Molten filler metal
C) Molten slag
D) Shielding gas

C) Molten slag

Cold welding is used on ____ metal

A) Thick
B) Hard
C) Brittle
D) Ductile

A) Thick

What is the primary metal that is welded with friction stir welding?

A) Cast iron
B) Stainless steel
C) Aluminum
D) Titanium

C) Aluminum

Which of the following statements is not true of explosion welding?

A) Special permits must be obtained before explosion welding can be performed
B) Explosion welding is an arc welding process
C) Explosion welding can be used to weld copper to steel
D) Explosion welding can be used to weld titanium to stainless steel

B) Explosion welding is an arc welding process

The AWS abbreviation for the forge welding process is _____

A) FOW
B) FRW
C) FW
D) FGW

A) FOW

X-ray exposure is a safety hazard in _____

A) LBW
B) EBW
C) EXW
D) CW

B) EBW

The AWS abbreviation for the electroslag welding process is EGW

False

Only one electrode can be used in the submerged arc welding process

False

Arc stud welding can eliminate the need to drill or punch holes in parts in order to use threaded fasteners

True

Lenses and mirrors are used to focus and aim a laser beam

True

Aluminum can be arc stud welded

True

Nontransferred arc torches can be used to weld materials that do not conduct electricity

True

During solid-state welding, the temperature of the material being welded is lower than its melting point

True

Forge welding is usually limited to the welding of solid bar stock

True

in friction welding, heat is generated when two rotating parts come in contact with each other

False

Ultrasonic welding equipment converts high-frequency electrical power to mechanical vibrations

True

The term plasticize, as used in friction stir welding, means to soften the base metal and allow it to flow

True

Electron beam welding uses a large amount of energy to produce deep, wide welds

False

The friction welding process requires a protective atmosphere

False

The orifice gas in plasma arc welding contains oxygen

False

The AWS abbreviation for the ultrasonic welding process is _______

USW

The AWS abbreviation for the friction welding process is ______

FRW

The tungsten electrode in plasma arc welding is surrounded by a(n) __________ gas

Orifice

Electroslag and electrodes welding are always done in the _________ position

Vertical

The welding process used for narrow groove welding is ______

GMAW

When large studs are welded using the arc stud welding process, a ceramic ________ contains the molten metal during arcing

Ferrule

Parts to be forge welded are heated to a(n) ________ heat in a blacksmith forge

White

The two major parts of the rotating tool used in friction stir welding are the wide _______ and the _______ , or probe

Shoulder, Pin

In the electrodes welding process, the electrodes may be ______ to ensure an equal distribution of heat from the arc(s)

Oscillated

The type of join most often used with plasma arc welding is the _______ joint

Butt

In electron beam welding, the voltage difference between the emitter and the anode is known as the _________ voltage

Accelerating

Air carbon arc gouging is performed using _____

A) either AC or DC current
B) A travel angle of 35º to 45º
C) A power source with a 60% duty cycle
D) All of the above

A) Either AC or DC current

The term scarfing refers to the _______

A) Rapid pecking motion of the electrode in a hole being pierced
B) Removal of unwanted material from a base metal
C) Accumulation of carbon deposits in a gouge
D) Blowing of molten metal out of a kerf

B) Removal of unwanted material from a base metal

The ____ cutting process can be used to pierce holes through mild steel up to 8 feet (2.5 m ) thick

A) Oxygen lance
B) Laser beam
C) Plasma arc
D) Flux oxygen

A) Oxygen lance

A during bar is a pipe filled with ______

A) Exothermic rods
B) A mixture of highly reactive gases
C) Liquid oxygen
D) Special alloyed wires

D) Special alloyed wires

During the air carbon arc cutting process, the air jets are set parallel to the electrode and ______ it

A) Just in front of
B) On either side of
C) Just behind
D) About 1/2" (13mm) in front of

C) Just behind

For the air carbon arc cutting process, the recommended angle between the electrode and the wrk surface is ______

A) 10º-30º
B) 30º-45º
C) 45º-60º
D) 20º-45º

D) 20º-45º

Which of the following is not true of automatic gouging?

A) The electrode travel angle is about 45º
B) Air pressure and flow rates are higher than for manual gouging
C) Automatic gouging is about twice as fast as manual gouging
D) The electrode extension is approximately the same as for manual gouging

C) Automatic gouging is about twice as fast as manual gouging

A ____ filter lens should be used during carbon arc of air carbon arc cutting

A) #8-10
B) #14-16
C) #12-14
D) #10-12

C) #12-14

A copper striker plate is used to ignite a(n) _______

A) Burning bar
B) Exothermic cutting rod
C) Oxygen lance
D) Both A and B

B) Exothermic cutting rod

Shielded metal arc cutting is performed using ____

A) Low-carbon electrodes
B) Currents that are lower than those used for welding
C) Electrode with fast-burning coverings
D) DCEP

A) Low-carbon electrodes

DCEP current is recommended for use with air carbon cutting

True

The thickness of the electrode coating prevents the electrode from shorting out when it is dragged across the base metal during SMAC

True

A manual carbon arc cut is generally ragged and has a poor appearance

True

For short duration curs with an exothermic burning bar, multiple Dewar flasks connected to an evaporator are required

False

Laser beam curling creates a very narrow kerf and a small heat-affected zone

True

Three people are normally needed to perform oxygen lance cutting

False

In the vertical position, air carbon arc gouging should be done from the top down

True

For piercing applications, a burning bar should be moved in and out of the hole constantly

True

A cut with an oxygen lance is generally started with the lance pipe at a near-vertical position

False

In the exothermic process, an oxyacetylene torch is necessary to continuously add heat to the cutting process

False

Exothermic cutting creates a lot of sparks

True

Introducing iron powder into a standard oxyfuel gas cutting torch flame increases the heat of the flame

True

Which of the following may be a factor in being terminated from a job or not being promoted?

A) Constant complaining
B) Lack of respect for others
C) Tardiness or poor attendance
D) All of the above

D) All of the above

Which o the following does not require a college education?

A) Welding engineer
B) Sheet metal worker
C) Metallurgist
D) Metallurgical engineer

B) Sheet metal worker

Which of the following is not a personal management skill that is sought by employers?

A) A developed career plan
B) A good attendance and work record
C) The ability to read charts and graphs
D) The ability to follow written directions

C) The ability to read chart and graphs

Having knowledge in the area of _____ helps a welder to better understand the function of threads, gears, friction, and energy conservation

A) Physics
B) Geometry
C) Computers
D) Print reading

A) Physics

A college- or university-level of education is required to become a(n) ______

A) Arc welder
B) Diver/Welder
C) Metallurgist
D) None of the above

C) Metallurgist