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44 Cards in this Set
- Front
- Back
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Of the many welding processes, what differentiates each process?
a. Source of heat b. Manner in which heat is applied c. Intensity of the heat d. All of the above |
d. All of the above
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In which welding process is the base metal NOT melted?
a. soldering b. brazing c. spot welding d. shielded metal-arc welding |
b. brazing
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which welding process uses a nonferrous filler alloy that has a melting point below 800 degree F.?
a. soldering b. brazing c. Spot Welding d. Shielded metal-arc welding |
a. soldering
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In selecting a welding process to join two metal items together, what is the most important single factor used to determine the welding process to use?
a. Cost b. Position of welding c. Welder qualifications d. Weldability of the metal |
d. Weldability of the metal
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Which of the following factors influence(s) the weldability of a metal?
a. The chemical composition of the metal b. The filler metal selected to use in the welding process c. Both 1 and 2 above d. The temperature of the base metal |
c. Both 1 and 2 above
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Why are metals with high thermal conductivity difficult to weld?
a. they transfer the heat away from the weld rapidly b. they retain heat in the weld area c. they radiate heat away from the weld area d. they lose heat rapidly due to convection |
a. they transfer the heat away from the weld rapidly
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Uneven expansion and contraction in a thin piece of metal due to the heat created from the welding process may cause what condition?
a. Fracture b. Stress c. Warpage d. Crackage |
c. Warpage
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Molten steels have a tendency to absorb certain gases during the welding process. Microscopic cracks in the weld joint are caused by (a) what gas and (b) the presence of this gas is controlled by using an electrode with what type of flux?
1.(a) Carbon dioxide (b) A cellulose flux 2.(a) Carbon dioxide (b) an iron oxide flux 3.(a) Hydrogen (b) A hydrogen-free flux 4.(a) Hydrogen (b) A low-hydrogen flux |
4.(a) Hydrogen
(b) A low-hydrogen flux |
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What definition best describes the term "joint efficiency"?
a. The tensile strength of the cross area of a welded joint b. The strength of a welded joint as compared to the base metal c. the tensile strength of the deposited weld filler metal d. The ultimate strength of the welded joint |
b. The strength of a welded joint as compared to the base metal
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what type of weld joint is used to join the edges of two members lying in the same geometric plane?
a. butt b. lap c. edge d. seam |
a. butt
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Which of the following types of weld joints is/are used to join two members located at right angles to each other?
a. Edge b. Corner c. Tee d. Both 2 and 3 above |
d. Both 2 and 3 above
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A weld that is triangular in cross section is classified as what type of weld?
a. Bead weld b. Tack weld c. Groove weld d. Fillet weld |
d. Fillet weld
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A tack weld is made to temporarily hold parts to be joined in proper alignment for final welding. Which of the following statements apply to tack welds?
a. they may not exceed 1 inch in length b. tack welds must be incorporated into the final weld c. Both 1 and 2 above d. they must be removed before final welding |
c. Both 1 and 2 above
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What is the major difference between a plug and a slot weld?
a. the shape of the hole made in the first member b. the amount of filler metal used to fill the hole c. the type of weld bead used d. the weld process used |
a. the shape of the hole made in the first member
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Of the following definitions, which one best describes the toe of the weld?
a. The exposed surface b. The junction between the face of the weld and the base metal c. The point at which the bottom of the weld intersects the base metal d. the gap between two plates before welding |
b. The junction between the face of the weld and the base metal
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In welding, what term is given to the area of the base metal that has not been melted but in which the properties and the structure of the metal have been changed?
a. Heat affected zone b. Inclusion zone c. Fusion zone d. Depth of fusion |
a. Heat affected zone
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If two plates are beveled to 22 1/2 degrees, what is the included angle?
a. 22 1/2 degrees b. 40 degrees c. 45 degrees d. 90 degrees |
c. 45 degrees
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The seperation between two members of a joint to be welded is defined by what term?
a. weld gap b. root openings c. root of the weld d. root gap |
b. root openings
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What type of structure is made up of several components joined by welding?
a. product b. weldment c. assembly d. jig |
b. weldment
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Which of the following information is contained in a welding procedure?
a. rind of welding material b. joint design c. preheat temperature d. all of the above |
d. all of the above
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Which if any, of the following definitions best defines the term "welding sequence"?
a. The chronological order of making the various welds in a weldment b. The order in which the weld metal is deposited c. The sequence followed when using two or more different welding processes d. None of the above |
a. The chronological order of making the various welds in a weldment
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What are the two types of intermittent welds?
a. Chain and staggered intermittent b. Chain and continous intermittent c. Incremental and continuous intermittent d. incremental and stepped intermittent |
a. Chain and staggered intermittent
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A groove melted into the base metal adjacent to the toe and not filled by weld metal is classified as what type of weld defect?
a. Spatter b. Overlap c. Undercut d. Crack |
b. Overlap
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What is the main cause of cracks in weld metals or in nearby heat-affected zones?
a. Expulsion of absorbed gases b. Uneven expansion or contraction of metals c. Poorly adjusted welding equipment d. Trapped solids at the bond between the weld and base metals |
b. Uneven expansion or contraction of metals
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Porosity in a weld is usually caused by which of the following factors?
a. Uneven contractions of metals during solidification b. Absorption of hydrogen during welding and the expulsion o fthe gas as solidification occurs c. Trapped solids at the bond between the weld and base metals d. Poorly adjusted welding equipment |
b. Absorption of hydrogen during welding and the expulsion o fthe gas as solidification occurs
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The weld defect in which nonmetallic solid material is trapped in the weld metal is called what type of defect?
a. Slag b. Slag inclusion c. Slag entrapment d. Slag expulsion |
b. Slag inclusion
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Fluxes have what primary purpose in the welding of metals?
a. They supply filler metals b. They clean dirty joints prior to welding c. They prevent oxides from forming on weld joints d. They prevent filler metals from giving off toxic fumes |
c. They prevent oxides from forming on weld joints
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Under which of the following conditions will a flux NOT serve its purpose in a welding operation?
a. when the base metal is improperly cleaned b. when the flux is applied directly to the joint c. when the base metal is a nickel-bsed alloy d. when the flux is applied to a cold joint |
a. when the base metal is improperly cleaned
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Which MIL-STD should you consult root opening required for a weld joint?
a. 2022 b. 1689 c. 1627 d. 22 |
d. 22
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A metal must be preheated before it can be arc welded. Which of the following factors influences the temperature and holdd time required to preheat the metal?
a. the type of electrode b. the thickness of the metal c. the chemical composition of the metal d. All of the above |
d. All of the above
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What class of piping is used for services where the pressure is 225 psi and the temperature is 450 degrees.
a. P-1 b. P-2 c. P-3 d. P-LT |
b. P-2
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You are welding a 12-inch pipe and one of the six tack welds cracks. Which, if any, of the following actions, should you take before you make the final weld?
a. Use a different material for the final weld b. Remove the cracked tack weld c. Prepare to incorporate the cracked weld into the final weld d. None of the above |
b. Remove the cracked tack weld
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Weld peening is used for what purpose?
a. to minimize residual stress b. to stop a pinhole leak c. to remove slag d. to smooth the weld bead surface |
a. to minimize residual stress
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Which of the following MIL-STDs should you use as a guide for welding P-1 class piping?
a. MIL-STD-22 b. MIL-STD-278 c. MIL-STD-271 d. All of the above |
d. All of the above
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When shop welding a section of P-2 class piping that is 0.105 inch thick, what welding process should you use?
a. shielded metal-arc b. gas tungsten-arc c. Both 1 and 2 above d. Gas metal-arc |
b. gas tungsten-arc
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Class P-3 piping is joined by silver brazing. What standard should be used for the fabrication and inspection of P-3 class piping?
a. NAVSEA 0900-LP-001-8010 b. NSTM, Chap 074, Vol 1 c. NAVSEA 0900-LP-001-7000 d. MIL-STD-1627 |
c. NAVSEA 0900-LP-001-7000
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Which of the following is NOT an element of a welding symbol?
a. finish symbol b. arrow c. NDT requirement d. Welding specification, process, or other references |
c. NDT requirement
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A welding job in an area where combustible materials were present took 1/2 hours to complete. What minimum amount of time must a fire watch be posted?
a. 1/2 hr b. 3/4 hr c. 1 hr d. 1 1/4 hr |
c. 1 hr
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Unless the gas-free engineer has determined the spaces to be safe, which of the following spaces should you consider unsafe for hot work?
a. closed compartments b. empty tanks c. voids d. each of the above |
d. each of the above
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You are ready to weld on a tank that has been pressed up. I'm welding, what does the term "pressed up" mean?
a. the tank is pressurized with air b. the tank is completely filled with water or oil c. the tank is partially filled with oil and pressurized with air d. the tank is partially filled with water and pressurized with air |
b. the tank is completely filled with water or oil
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Why is it dangerous to weld or cut on a hollow metal object that has not been vented?
a. An explosion could occur due to flammable gases b. An explosion could occur from an increase in air pressure due to the object being heated c. An explosion could occur because you cannot inert the object d. An explosion could occur due to flammable liquids |
b. An explosion could occur from an increase in air pressure due to the object being heated
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What shade of filter lens should you use for light gas cutting and welding?
a. No. 5 b. No. 2 c. No. 6 d. No. 4 |
a. No. 5
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You are arc welding on a piece of carbon steel plate with the machine set on 120 amps. What shade of filter lens should you select for your welding helmet?
a. No. 10 b. No. 11 c. No. 12 d. No. 14 |
a. No. 10
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Why do wool garments worn while welding afford grearter protection to the body than cotton garments?
a. Cotton absorbs and retains heat b. wool is heavier than cotton c. Cotton is an explosive material at high temperatures d. wool does not ignite as readily as cotton |
d. wool does not ignite as readily as cotton
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