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welding exam

QuestionAnswer
The preventive maintenance schedule for an engine driven welding machine is usually based on the number of hours that the engine operates
A voltage step down transformer converts high voltage ,low amperage current to low voltage, high amperage current
the conductors in welding cables are made of strands of what wire copper
engine generators should be shut down if no welding is to take place for more than how many minutes 30
if the tip of a smaw electrode is touched and help against the workpiece instead of allowing for a gap between the two the electrode will pass electricity directly to the workpiece without creating an arc
hand tools for preparing a welding surface and cleaning a completed weld include files, wire brush and chipping hammers
weld slag chippers and needle scalers are what tools pneumatically powered
smaw power supplies are designed to produce an output that has a what current nearly constant
the longer the distance the welding current must travel the larger the welding cable must be to reduce voltage drop
in a transformer rectifier type welding system AC voltage is reduced to a lower voltage level and then converted (rectified) into DC voltage
when lifting heavy objects objects that tend to spin or swing always remember to use tag lines
the primary current for a welding machine can be 120v or 240v single phase or _________ three phase 480v
the size of an arc welding machine is determined by its rated amperage and duty cycle
when stringing welding cable overhead or between floors use ____ to tie off the cables rope
the standard frequency of alternating current (AC) in the US is set at _________ cycles per second 60
the flux coating of electrodes _________ the metal cleans and deoxidizes the metal
non low hydrogen electrodes may be used if their coatings are not damaged and they have not come in direct contact with ______ water or oil
the chemical and mechanical properties of the base metal can be obtained bt referring the the ______ base metal mill specifications
All electrodes used for code work must have the AWS classification number printed on them as well as on the container in which they are shipped
normally an electrode should be ______ than the metal being welded smaller in diameter
The . powdered metal added to some flux coatings adds filler metal to a weld and helps ________the weld improve the appearance of
if quality control representatives find that welds made on critical equipment were made with high moisture electrodes the welds made will have to be replaced
the weld in smaw is formed by the wire core mixing with the melted base metal
Electrodes with powdered iron in their flux belong to the ______ electrode group fast fill
The most common electrodes are discussed in the American welding society specifications A5.1 and A5.5
Acceptable base metal and filler metal combinations are listed in section II, material specifications of the American society of Mechanical Engineers (ASME) Boiler and pressure vessel code
Low hydrogen electrodes that exceed the maximum exposure time can be dried one time
The period of time a low hydrogen electrode can be outside a heated oven is defined by exposure time
To determine the minimum tensile strength per square inch of the deposited weld metal created by an electrode multiply the first 2 digits ( or 3 if 100 or over ) of the marking on the electrode by _______ 1000
After sealed container of low hydrogen electrodes is opened the electrodes must be stored in special ovens at a temperature setting of 250
welding codes require that the crater made by a termination of the weld be filled to the full __________ of the weld Cross Section
Arc strikes are left on the base metal by the ________ method of striking an arc scratching
a weld bead that is made with a side to side motion of the electrode is called a __________ bead. weave
The best method of striking an arc when using a transformer DC welding machine is the _______ method Tapping
Magnetic fields created during welding tend to concentrate in the corners of the ________. base metal
When striking an arc in SMAW welding the general rule is that the arc length should be _________ the same as the diameter of the electrode
concentrated magnetic fields in the base metal cause the arc to . Deflect
the most common fillet welds made are in ___________ joints lap andT joints
When practicing welding, reuse weld coupons until all surfaces have been welded on
to control the weld puddle when depositing an E6010 electrode stringer bead use a _________ motion whipping
welding codes require that the crater made by a termination of the weld be filled to the full __________ of the weld Cross Section
Arc strikes are left on the base metal by the ________ method of striking an arc scratching
a weld bead that is made with a side to side motion of the electrode is called a __________ bead. weave
The best method of striking an arc when using a transformer DC welding machine is the _______ method Tapping
Magnetic fields created during welding tend to concentrate in the corners of the ________. base metal
When striking an arc in SMAW welding the general rule is that the arc length should be _________ the same as the diameter of the electrode
concentrated magnetic fields in the base metal cause the arc to . Deflect
the most common fillet welds made are in ___________ joints lap andT joints
When practicing welding, reuse weld coupons until all surfaces have been welded on
to control the weld puddle when depositing an E6010 electrode stringer bead use a _________ motion whipping
A fillet weld is acceptable even if it has _______ a slight non-uniform face
before welding coupons made of 1/4" to 3/4" mild steel use a wire brush or grinder to ______ the coupons remove heavy mill scale or corrosion
the point at which the back of the weld intersects the base metal is called the weld _____ root
when overlapping stringer beads use a work angle of ________ degrees toward the first stringer bead to obtain proper tie - in 10 to 15
arc length is measured from______ the end of the electrode core to the base metal.
When using stringer beads on V groove welds in the horizontal position keep the electrode drag angle at _______ degrees 10 to 15
the distance the joint preparation extends into the base metal is called the depth of bevel
prior to welding any surface in a weld groove is called a groove face
the most common American welding society plate welding qualifications test requires the use of _______ electrodes low hydrogen
when preparing weld coupons for V groove welds with backing center the beveled strips on the backing strip with a ________ gap and tack - weld them in place 1/4"
prior to welding any surface in a weld groove is called a groove face
cooling welds with water can cause weld cracks and affect the mechanical properties of the _______ base metal
single groove welds with metal backing are used for ______ welds. high- strength
When practicing horizontal v-groove welds, pay particular attention at the termination of the weld to fill the crater
When running vertical stringer beads on a v- groove joint in the vertical position, set the welder amperage in the ____________ of the range for better puddle control lower part
When preparing weld coupons for v- groove welds with backing, cut the metal backing strips so that they are at least 1" by 8"
The most common American Welding Society plate welding qualification test requires the use of low hydrogen electrodes
Groove welds should be made with slight reinforcement and a gradual transition to the base metal at each toe
The centering head attachment of a combination square is used to measure round stock and to locate the center of shafts or other round objects
Chain clamps are used to align and hold pipe for fit up and tacking
A simple welding sequence with short welds ___________ of the joint is recommended to reduce the effects of shrinkage on alternating sides
Internal misalignment between two sections of pipe to be welded end to end is checked using a Hi-Lo gauge
When using weave beads in flat open root v groove welds use a ___________ degree drag angle 10-15
Welding codes allow the __________________ on an open -root v groove welds to be within the range of 0" to 1/8" root face
When running vertical weave beads on a v groove joint in the vertical position the width of the weave beads should be no more than ________ times the diameter of the electrode being used five
if 3/8" carbon steel is not available, practice welds can be made on steel ____ to 3/4" thick 1/4"
cooling with water is only done on practice coupons
when using weave beads on an open root v groove welds in the vertical position , keep the electrode at a work angle of ____________ degrees to the plate surface for the first pass 0 degrees
for an open root v groove weld, root reinforcement should be flush to 1/8''
To prevent undercut in a vertical open root v groove weld , the welder should pause slightly at each weld toe to penetrate and fill the crater
to control the weld puddle when welding horizontal open root v groove welds drop the angle of the electrode slightly, but no more than 10 degrees
Horizontal welds can be made on a horizontal open root v groove or on a vertically positioned flat surface
groove welds should be made with slight reinforcement and a gradual transition to the base metal at each toe
when the plates are vertical and the axis of the weld is horizontal, the code for this position of groove weld is 2G
Created by: grace17grace
 

 



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