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TIG final

Question	Answer
the backing strip for welding mild steel up to 3/4" thick should be _________ thick by _____ wide.	3/8";3"
surfacing welds are used to	build up surfaces
the most common defect caused by surface contamination is	porosity
which of the following is a correct statement with regard to cleaning of base metals before welding?	all metals should be cleaned before welding
wire brushing will not remove	tight corrosion
a detailed listing of the rules and principles that apply to specific welded products is a	welding code
mechanical joint preparation is ________ than thermal methods of joint preparation	slower
compared to a single v-groove weld, a double v-groove weld .	requires half the weld metal
plug and slot welds are used with _______ joints	lap
the groove angle for welding open root welds on plate should be ______ degrees	60
preparing a joint with oxyfuel, plasma arc, or carbon arc cutting processes is known as _________ joint preparation	thermal
pipe beveling machines are designed to cut and bevel pipe from ________ in diameter	2" to 60"
always try to position the weldment so that welding is performed in the ________ position	flat
large areas of surface corrosion are best removed by	angle grinders and end grinders
special internal equipment is available for cutting pipe larger than ________ in diameter	54
essential variables identified by a welding procedure specification (WPS) are items that cannot be changed without ________.	requalifying the welding procedure
most porosity is caused by improper welding techniques and _________.	contamination
A complete set of fillet weld gauges includes seven individual blade gauges that can measure _______ different weld sizes	11
The private organization that does not actually prepare standards, but instead adopts standards that it determines are of value to the public interest is called the ________	American National Standards Institute (ANSI)
which destructive test requires that the sample be pulled until it breaks	tensile test
the failure of the filler metal to penetrate and fuse with an area of the weld joint is known as _________	incomplete joint penetration
the results of testing the WPS for a job are recorded on a _________ and kept on file.	procedure qualification record (PQR)
The most common defects found by a liquid penetrant test are _________	surface cracks
when inspecting a fillet weld, the convexity of a fillet weld will be approximately_______ times the actual face width or the width of the individual surface bead, plus 1/16"	0.07
A groove is melted into the base metal beside the weld in the condition called ___________	undercut
the specifications for acceptable welding and brazing filler metals and fluxes (part C) are contained in section ______ of the American Society of Mechanical Engineers (ASME) Boiler and pressure vessel code (BPVC).	II
in a typical ASME welder qualification test using an open root , if F3 electrodes are used all the way out, the welder qualifies on ___________ on both plate and pipe	F3 electrodes only
the gauge shown in the figure above is a(N) ____________ gauge	fillet weld
the number / letter designator for fillet welding on plate in the flat position is_______	1F
porosity can be grouped into ______ major types	four
if you have a question about the quality of a weld and your supervisor is not available, who is the next person in the chain of command you should contact	general foreman
prior to welding, the base metal should be examined for conditions that may cause weld defects, and the dimensions should be __________	confirmed by measurement
the walls surrounding the area in which GTAW work is being performed should be painted with paint that is ______	non reflective
Carbon steel filler metals are identified by AWS specification A5.18 and low - alloy steel filler metals are identified by AWS specification ___________	A5.28
when filler metal is graded for rigid control fabrication, the purchaser receives________	certificate of conformance
if you see the label TIG on a welding machine, that machine is considered to be what kind of a welding machine	GTAW
GTAW is almost always performed using	DCEN . direct current electrode negative
GTAW commonly uses the same power sources and welding machines used for	SMAW
the two principal shielding gases used for GTAW are _________	argon and helium
for GTAW the electrode is clamped in place inside the torch body by the	collet assembly
when welding with GTAW in a cross draft situation better shielding is provided by	argon
higher shielding gas flow rates are required with	larger nozzles
in the atmosphere near the weld the uv radiation from the GTAW process can ionize	oxygen
of the various types of tungsten electrodes available the tungsten electrodes that are used for AC welding are	pure
which welding process is recommended for the repair of a defect on clean magnesium castings	GTAW
one of the advanced features associated with the GTAW process is the high frequency intensity controls that provide better	arc starting
in a root pass the penetration is controlled by using the correct torch travel speed and	amperage
compared to the diameter of the electrode being used stringer beads are generally no more than how many times the diameter of the electrode	3
when making GTAW stringer beads in the vertical position you should use a push angle of	15-20 degrees
the major control of bead width is	arc length
with open v-groove weld the actual number of weld beads will vary depending on the	plate thickness
when performing cutting or welding operations that produce toxic fumes you must wear a respirator that supplies air from	outside the work space
in the walking the cup technique, the edge of the torch nozzle (cup) is rested	against the base metal
GTAW welding uses metal electrodes that are	tungsten
when terminating a GTAW weld the crater must be filled to the full cross section of the weld to prevent	cracking
if the tungsten electrode touches the filler metal the welder must	clean the electrode
when running the fourth bead of a GTAW fillet weld in the 1F position how much of the second bead should you overlap	1/2
a good overlapping bead will have a	nearly flat surface
when making a GTAW fillet weld in the horizontal (2F) position , pay close attention to the	torch angles
the travel angle created when the torch is tilted backward so that the tip precedes the torch in the direction of the weld is called a	push angle
in the freehand technique the GTAW filler rod should be held at what angle to the plate surface	20 degrees
when making a GTAW fillet weld in the 1f position the torch must be held at what angle to each plate surface	45 degrees

Created by: grace17grace

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