201c Flashcards
(47 cards)
stringer padding means that the base metal surfaces are to be?
A. welded flush with very thin overlays
B. built up uniformly using stringer beads
C. Finished with a wide, smooth metal flow
D. reinforced in worn areas prior to machining
B. built up uniformly using stringer beads.
the root pass is produced when the:
A. first stringer pass is applied to any project
B. gravity is taking the weld metal towards the root
C. electrode has a short arc length and fast travel
D. first penetrating bead is at the root of a joint
D. first penetrating bead is at the root of the joint.
weave beads are deposited when the electrode is:
A. manipulated with forward backward stepping motion
B. whipped in and out of puddle with long arc
C. moved forward with and side to side motion while welding
D.progresses slowley in the direction of travel to produce a wide, flat bead
C. moved forward and side to side while welding.
a cover pass is a:
A. thin weave or a series of passes used as the final layer of weld metal
B. weld used to cover surface defects
C. weave bead welded with high heat and fast travel
D. bead that penetrates and covers the root pass
A. thin weave or a series of passes used as the final layer of weld metal
what is the main purpose of pausing on the edges of a weave beads
to obtain a blend to eliminate undercut at the toes of a weld
electrode angle is:
A. determined by the weld sizes.
B. the amount of the electrode is tipped forehand or backhand.
C. normally one half the angle of the joint.
D. the variable that determines
C. normally one half the angle of the joint.
when the arc length is increased during welding, what happens to those characteristics?
A. penetration _________
B puddle fluidity__________
A. penetration decreases
B. puddle is more fluid
what are two (2) commonly used methods for striking the arc with SMAW?
A. amperage surge method and long arc method
B. dead short method and manipulative method
C. tapping method and scratch method
D. lift start method and polarity method
C. tapping method and scratch method
where should the you Strick an ark on a stop/restart?
start the ark within the weld zone where the marks are to be remelted within the weld progretion.
Excessive current settings for SMAW are indicated by:
A. lack of penetration
B. excessive spatter
C. very smooth bead appearance.
D. a high crowned bead.
B. excessive spatter
a normal ark length is considered equivalent to the:
A. diameter of the core wire of the electrode.
B. diameter of the electrode including the flux coating.
C. length of the electrode
D. length of the weave bed
A. diameter of the core wire of the electrode.
what arc length gives the following characteristic.
a) best blend into the edges of a weave bead_______________
b) deepest penetration ______________
c) highest rate of metal deposit ____________
d) widest bead _______________
a) long ark lengths
b)short ark lengths
c) sort ark lengths
d)long ark lengths
what is the beast method for determining the current setting of an electrode?
A. follow the directions on the electrode containe.
B. set current according to the manufacturer’s recommendations and then test on a piece of scrap approximately the same thickness as the metal needed for the weld project.
C. have your supervisor adjust the controls to correspond to the welding procedure.
D. just listen to the way the electrode burns until it sounds about right
B. set current according to the manufacturer’s recommendations and then test on a piece of scrap approximately the same thickness as the metal needed for the weld project.
what should you do to maintain a normal ark length with electrodes that have high iron powder coatings?
A. maintain an ark length equal to twice the core diameter
B. use the lowest possible current settings
C. Keep the flux coating in contact with the metal surface
D. maintain a 0 electrode inclination.
C. Keep the flux coating in contact with the metal surface
when you delibertley shorten ark length, what are you expecting to achieve?
A. a wider bead with less penetration.
B. deeper penetration with decreased puddle fluidity.
C. increase puddle fluidity and slower burn off rate
Increased burn off rate and increased puddle fluidity
B. deeper penetration with decreased puddle fluidity.
what electode inclunation is recommended for the first pass of a 2F weld on 10mm (3/8)material using a 3.2mm (1/8) E4310 (E6010) Electrode?
A. 5-30 forehand
B. 5-30 backhand
C. 45 in the direction of travel
D. 45 on the vertical surface
B. 5-30 backhand
what type of bead is used for the cover pass on a 2F weld on 10mm (3/8) material
A. herringbone weave bead
B. Stringer bead
C. modified lazy L bead
D. long dwell crescent bead
B. Stringer bead
what procedure is recommended to complete a 3F weld using E4310 (E6010) electrodes on 10mm (3/8) material?
A. completely fill the joint with one large pass.
B. use on weave root bead followed by a weave fill and weave cover pass.
C. us stringer beads on all passes, working from the bottom upwards.
D. use stringer beads on all passes, working from the top downwards
B. use on weave root bead followed by a weave fill and weave cover pass.
what action would you take to avoid excessive buildup at the center of the cover pass of a 3F weld?
_________________________
travel faster across the center with a slight increase in ark length
what polarity is recommended for these electrodes.
a) E4310 (E6010)
_____________
b) E4914 (E7014)
____________
c) E4918 (E7018)
_____________
a) DCEP (direct current electrode positive)
b) AC or DCEN (direct current electrode negative)
c) AC or DCEP (direct current electrode positive)
A quick test for polarity can be done using witch electrode?
A. E4310 (E6010)
B. E4914 (E7014)
C. E4918 (E7018)
D. E4928 (E7028)
A. E4310 (E6010)
Changing the inclination of the electrode in relation to the direction of travel:
A. affects the depth of penetration.
B. does not effect the weld
C. causes the weld to build up on the edges
D. causes ripple to form uneasily
A. affects the depth of penetration.
the number and letter combination 3F and 2G, for example, represent:
A. the type of electrode and weld metal analysis required for the project
B. the joint design and configuration
C. the required position and type of weld
D. the required process and joint design
C. the required position and type of weld
why is it important to remove the slag between passes on a multi-pass weld
A. to allow the weld to cool between passes
B. to make the job last longer
C.to help prevent slag inclusion between passes.
D. so you can strike and maintain a stable arc when placing next bead on the weld.
C.to help prevent slag inclusion between passes.
