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Welding 1&2
Mid-Term Study guide
62
Education
12th Grade
12/14/2011

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Cards

Term
What is not a requirement for the SMAW process?
Definition
Gas Supply
Term
what is and incorrect statement about an E7018 electrode?
Definition
They are suitable for flat position and horizontal fillet only
Term
The distance from the molten tip of the SMAW electrode to the surface of the molten weld pool schould be
Definition
one electrode diameter
Term
Which of the following electrodes is not suitable for use in all positions?
Definition
E7024
Term
Which if the following electrodes would you select to produce a weld with shallow penetration?
Definition
E6013
Term
An engine- driven generator without a rectifier produces what form of welding current?
Definition
AC only
Term
Which group of electrodes is low hydrogen type?
Definition
E7015, E7016, E7018
Term
Arc blow is caused by?
Definition
magnetic forces associated with direct current
Term
Duty cylce is a term used to indicate the...?
Definition
Percentage of time in a 24 hour cycle that a machine can operate at rated output
Term
When the welding machine is set to DCEP, cutrrent flows?
Definition
from the work to the electrode
Term
Which of the following welding cable sizes is the largest?
Definition
#2/0
Term
Rectifiers are noted for their ability to..?
Definition
Change AC to DC
Term
in north america, alternating current changes direction...
Definition
120 times per second
Term
In order to reduce waste and control cost, you should weld until the electrode is
Definition
down to the classification numbers
Term
The last digit in the electrode classification E7018 idicates.
Definition
Type of current and electrode coating
Term
THe E7024 electrode can be used in
Definition
flat positon and horizontal fillets only
Term
The electrode classification that indicates a deep penetrating electrode that can be used with alternating current (AC) current is
Definition
E6011
Term
Back-steeping at the end of a weld made with the SMAW process
Definition
help to prevent crater cracking
Term
the first two digits of the electrode classification indicate the...
Definition
minimum tensile strength of the deposited weld.
Term
An E6010 deep penetrating electrode belongs to
Definition
F3 group
Term
In GMAW, the shielding for the molten matal is accomplished through the use of..
Definition
inert and reactive gases
Term
GMAW us the abbreviation for
Definition
gas metal arc welding
Term
In GMAW, isufficiant gas flow can cause?
Definition
porosity
Term
A warn contact tube results in...
Definition
poor arc starts
Term
The benefit of copper coated electrode wires is
Definition
better arc starts, increases contact tip life, improved wire feeding
Term
What type of power source is used for GMAW?
Definition
Constant Voltage
Term
In GMAW, which type of metal transfer is restricted to a flat position and horizontal.
Definition
Spray transfer
Term
What type of electrode wire is used with GMAW?
Definition
Solid
Term
in GMAW, the amperage is controlled by adjusting the
Definition
wire feed speed
Term
in gas metal arc welding, electrode extension is defined as the distance from the..
Definition
end of the contact tube to the tip of the wire
Term
Which AWS electrode classification is correct for GMAW wire?
Definition
ER70S-3
Term
Which of the following is considered an advantage of the GMAW process?
Definition
Higher deposition rates than manual processes, easy to use comapared to manual processes, Less electrode waste then with SMAW.
Term
ELectric current is transferred to the electrode through the...
Definition
contact tube
Term
what shielding gas or gas mixture with not produce spray transfer?
Definition
100% Co2
Term
The contact tube should be?
Definition
sized to match the the wire diameter
Term
What does the 70 indicate in the electrode classification ER70S-3
Definition
Tensile strength
Term
Excessive amounts of weld spatter in the nozzle may cause
Definition
poor shielding
Term
which of the following is not recommended when welding with short-circuiting
Definition
welding heavy plate
Term
which of the following is not an advantage of the GMAW process
Definition
good for use in windy areas
Term
The transfer mode that uses low currents, low voltage, and small diameter electrode wire to weld in all positions is called
Definition
short circuiting transfer
Term
what positions and types of welds can be successfully welded using the spray transfer mode on carbon steel?
Definition
1f, 2g and 2f
Term
which of the shielding gas or gas mixture is most often used for welding carbon steel with the short-circuiting transfer mode?
Definition
75% argon, 25% Oxygen
Term
Which gas is inert?
Definition
Argon
Term
Potential hazards related to arc welding are..
Definition
radiation, fumes, toxic gases.
Term
when using a fire extinguisher to eliminate a fire it should be pointed to the
Definition
base of the fire
Term
What type of fire extingusher should be used on an electical fire
Definition
type c
Term
What are the initials of the federal organization created to insure safe and sanitary working conditions for employees
Definition
OSHA
Term
The maximum safe working pressure for Acetylene is
Definition
15psi
Term
Vaporized metals, such as zinc, cadmium, lead, chromium and berylllium
Definition
are hazardous
Term
Fuel gas hoses are usually colored
Definition
red
Term
flah burn is
Definition
a burn to the eye caused by exposure to ultriviolet light from the welding arc
Term
one should never enter a welding shop without wearing
Definition
safety glasses
Term
what should one never use on gas cylinders, regualtors, connections and hoses?
Definition
oil
Term
one should never weld or cut directly against
Definition
concrete
Term
one should never operate arc welding euipment while
Definition
standing on wet or damp floors
Term
A burn that caused the skin to blister is referred to as a
Definition
second degree burn
Term
The selection of a corrext lens shade number depends on the
Definition
amount of welding current being used
Term
federal regualtion requires that hazardous information about a product be provided to all users of the product. The form used to provide this information is called a(n)
Definition
Material Safety Data Sheet (MSDS)
Term
Which of the following is the only acceptable method for lighing oxyfuel torches?
Definition
Striker
Term
Areas that have less then____ cubic feet per welder, or that have cielings less than 16ft high, require forced ventilation.
Definition
10,900
Term
A confined space is one that?
Definition
is large enough that a person can enter and perform tasks
Term
A hot work permit
Definition
authorizes the performance of work potentially posing a fire hazard
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