AWTC Chapter 1 Chapter 1 - wcvtc.wyom.k12.wv.uswcvtc.wyom.k12.wv.us/WeldingNTID.pdf · AWTC Chapter 1 Chapter 1 Please answer the following questions, then press the "Grade My Test"

9/28/2018 AWTC Chapter 1

AWTC Chapter 1 Chapter 1

Please answer the following questions, then press the "Grade My Test" button to find out your score.

1. In the equation I = E R, the letter "E" represents

a) amperes

b) volts

c) electron

d) watts

2. The movement of protons throughout the length of a conductor constitutes an electrical current.

a) TRUE

b) FALSE

3. If the electromotive force is sufficient, voltage will move through a conductor.

a) TRUE

b) FALSE

4. A metal which has a high iron content is known as a metal.

a) heavy ( b) ferrous

c) basic

d) non-ferrous

Dc 1 5. The two types of slag used in steel refining are acid and

a) deoxidized

( b) open hearth

( c) sweet

d) basic

6. A change in temperature sufficient to alter the crystalline structure of a metal is known as

a) alpha iron

b) phase transformation

L c) dendrites

d) austenitic

7. When crystals form, they meet at their

a) freezing point

( b) lattice line

c) grain boundary

d) microstructure border

8. In a constant current welding power source, the welding current remains relatively constant despite considerable changes in

a) resistance

b) arc length

c) primary voltage

d) rectification

9. A type 4340 steel has approximately 40% carbon content.

a) TRUE

b) FALSE

10. In arc welding, electrical energy is changed to heat energy.

a) TRUE

b) FALSE

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AWTC Chapter 1

11. The point at which a metal reaches the limit of its elastic characteristic determines its

O a) tensile strength O b) percentage of elongation

O c) yield strength

O d) creep strength

12. Unlike charges attract and like charges repel.

O a) TRUE

O b) FALSE

13. The term "drooper is often used to describe what type of machine?

O a) rotating

O b) constant voltage Co c) constant current O d) camel back

14. Alternating current Is changed to direct current through the use of a

O a) transformer O b) rotating coil O c) rectifier

O d) voltage regulator

15. The properties of metals are determined by their microstructure.

O a) TRUE

O b) FALSE

16. As long as power supplied to a transformer circuit is held steady, the secondary current will decrease as the primary voltage

(:) a) decreases

O b) stabilizes O c) rectifies O d) increases

17. Steel. which has a total alloy content of 10% or more. is known as a low alloy steel. O a) TRUE

O b) FALSE

18. How much voltage is needed to pass 150 amps through a resistor of .14 ohms? O a) 1071.4 O b) 9

O c) 230

O d) 21

19. The reluctance of atoms to give up their electrons is known as O a) electromotive force

O b) inductance

0 c) electrical resistance O d) rectification

20. Steel is an alloy of carbon and iron. O a) TRUE O b) FALSE

21. Is one of the most effective alloying elements for Increasing the hardness and strength of steel. O a) Chromium O b) Copper

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AWTC Chapter 1

O c) Tungsten O d) Carbon

22. During one AC cycle, current is at its maximum negative at what degree of rotation? O a) 45' + 180* O b) 90' + 270' • c) 180' + 360' • d) 0' + 180'

A welding operator strikes an arc and adjusts his machine to 27 volts and draws 280 amps. How much power in terms of 23. watts does he use?

O a) 10.37 • b) 0.103 • c) 7560 • d) 75.6

24. The notch toughness of steel Is greatly Improved with the addition of 0 "a) carbon

O b) nickel O c) manganese • d) silicon

25. Efforts are made to eliminate • a) sulfur • b) molybdenum O c) columbium

d) vanadium

from steel because it can cause brittleness.

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9i28/2018 AWTC Chapter 2

AWTC Chapter 2 Common Electric Arc Welding Processes


1. When a 75% argon/25% CO 2 shield is used with a flux cored electrode designed for 100% CO 2 , there will be

a) more spatter

C b) an increase in ductility

c) insufficient shielding coverage

d) a change in weld chemistry

2. Self-shielding flux cored electrodes do not depend on a gaseous shield to protect the welding zone from the atmosphere.

a) TRUE

b) FALSE

3. A mixture of 50% argon and 50% CO2 is the best shielding gas for spray transfer.

a) TRUE

b) FALSE

4. Practically all GMAW is done using

L a) alternating current

b) flux cored electrodes

c) reverse polarity

d) composite electrodes

5. The flux used in SAW applications has no effect on the weld chemistry.

a) TRUE

b) FALSE

6. Electrogas welding is technically not an arc welding process.

a) TRUE

b) FALSE

7. A major advantage of the SAW process is that the arc is highly visible.

a) TRUE

b) FALSE

8. An erratic arc due to poor current transfer may be the result of a worn

a) drive roll

b) gas cup

(,_ c) contact tip

(_ d) aspirator

9. As the distance between a power source and welding station is increased, the welding cable should be

to lessen resistance.

a) straightened

b) increased in diameter

c) carefully coiled

d) decreased in length

10. The SAW process is a

a) high deposition

b) self shielding

c) low efficiency

d) highly mobile

process.


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11. A 1/4" diameter coated electrode will deposit weld metal at a faster rate than 1/16" diameter solid electrode only when both electrodes are operated at the same current.

a) TRUE

b) FALSE

12. The dense slag covering in GTAW is instrumental in producing exceptionally clean welds.

a) TRUE

b) FALSE

13. The SMAW process requires a constant current type of power source.

a) TRUE

b) FALSE

14. A trimix of helium, argon, and CO2 is a popular shield for welding low carbon steel.

a) TRUE

b) FALSE

15. Current polarity becomes an important factor with

power sources.

a) all constant current

C b) all AC

C. c) all transformer

C d) all DC

16. In short circuiting welding, the power source must have a control,

a) slope

b) spray

c) transformer

d) wire feed

17 .

When using a constant voltage power source, the prime function of the at a constant speed.

C, a) welding gun

( b) wire feeder

C c) constant voltage

( d) flow regulator

is to deliver the welding wire to the arc

18. When using the GMAW process for out-of-position welding, the best transfer mode is

(, a) globular

C b) spot

C c) spray

C. d) short circuiting

19. DCRP is produced when the electrode is connected to the positive terminal of the welding power source.

a) TRUE

b) FALSE

Early welding research found that the integrity of weld metal was greatly improved when from the molten puddle.

L a) helium & argon

C . b) nitrogen and oxygen

c) carbon dioxide & argon

d) columbium & titanium

20. were excluded

21. A major difference between argon and carbon dioxide as shielding mediums is that argon is

L_ a) less expensive

C b) chemically inactive

• c) chemically reactive

• d) heavier


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22. The gas shield used in electroslag welding must be of extremely high purity.

a) TRUE

b) FALSE

23. A major difference between the two types of flux cored electrodes is that the gas shielded type

a) requires a longer stickout

b) has a slag cover

c) operates only on DCSP

C . d) produces a metallurgically cleaner weld

24. Alternating current is the best choice for welding aluminum by the GTAW process because it provides

a) good oxide cleaning

b) a wide weld bead

c) deep penetration

( d) high heat concentration at the electrode

25. One way to minimize the possibility of arc blow when welding with coated electrodes is to

a) switch to DC

b) regulate the slope control

c) switch to AC

d) change to reverse polarity

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I 9/28/2018 AWTC Chapter 3

AWTC Chapter 3 Mild Steel Covered Electrodes

Please answer the following questions, then press the 'Grade My Test' button to find out your score.

1. Nitrogen in the arc atmosphere is not harmful

O a) TRUE

O b) FALSE

2. The principal ingredient of £6012. £6013 and E7014 electrode coating is:

O a) Rutile O b) Wood Pulp

O c) Limestone

O d) Fluorspar

3. The principal Ingredient of the covering of £6010 and £6011 electrodes Is: (3 a) Rutile

o b) Wood Pulp

O c) Limestone

o d) Fluorspar

4. AWS designations are assigned to individual mild steel electrodes by the

O a) AWS

O b) Manufacturer

O c) ASME

5. Classifications 0016 and £7018 electrodes are Low Hydrogen.

O a) TRUE

O b) FALSE

6. The covering of mild steel electrodes has very little effect on the behavior of the electrodes.

O a) TRUE

O b) FALSE

7. Mild Steel Covered electrodes operate with which type of power source? O a) Constant Potential

O b) Constant Current

8. The size of a covered Mild Steel electrode Is determined by: O a) the finished covering diameter O b) core wire diameter

O c) neither

9. Atom Arc 7018 electrodes are limited to welding horizontal fillets and flat position.

O a) TRUE

o b) FALSE

10. Sureweld 70LA-2 Low Hydrogen electrodes have Lime-type covering.

O a) TRUE

o b) FALSE

11. Which Sureweld electrode will produce the highest deposition rate?

O a) Sureweld 10P

O b) 7018

o o) 7024

O d) SW-15

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12. The E7016 electrodes are designed to be used only on alternating current.

a) TRUE

b) FALSE

13. In comparison to Sureweld SW15 electrodes, the Sureweld SW15-IP can be welded using:

u a) higher currents

b) lower currents

u c) only the same currents

14. Sureweld 7024 electrodes contain heavy concentrations of iron powder in the covering.

a) TRUE

b) FALSE

15. Sureweld SW15 electrodes can successfully weld thicknesses of steel:

a) sheet metal only

b) heavy thicknesses only

c) all thicknesses

16. The addition of large amounts of iron powder to electrode coatings increases the weld metal

a) Hardness

b) Fluidity

c) Impact properties

d) Deposition rate

17. Sureweld SW14 electrodes can be used on:

a) AC

b) DC straight polarity

c) Neither

18. Mild Steel covered electrodes are approved by:

a) AWS

b) ASME

c) Neither

19. The type of electrode best suited for welding free-machining steel having a relatively high sulfur content is

a) Cellulosic

b) Rutile or titania

c) Low Hydrogen

20. The length of the discarded stub has no bearing on deposition efficiency.

a) TRUE

b) FALSE

21. Classification E6010 electrodes are best used on alternating current.

a) TRUE

b) FALSE

22. Sureweld 10P electrodes are used in all welding positions.

a) TRUE

b) FALSE

23. Atom Arc 7018 electrodes were the first iron powder, low hydrogen electrodes produced in the United States.

a) TRUE

b) FALSE

24. Sureweld SW612 electrodes are useful for poor fit-up welding


- 9/28/2018 AWTC Chapter 4

AWTC Chapter 4 Low Alloy Covered Electrodes


1. Atom Arc 8018N weld metal remains tough and crack resistant at

a) -220°F

b) -100°F

c) -160°F

2. The presence of nickel in low alloyweld metal

a) decreases the notch toughness at low temperature

b) increases the notch toughness at low temperature

c) has little, if any affect

3. The letter-number suffix - Al of the classification number indicates that the weld metal contains

c, a) 1% nickel

• b) 2% chromium

C, c) 1/2% molybdenum

4. The AWS classification of low alloy electrodes is guaranteed by the

C a) AWS

(_, b) ASME

c) manufacturer

5. Atom Arc 4130 responds to heat treatment similar to

a) mild steel

• b) stainless steel

C c) SAE 4130

d) SAE 1120

6. Atom Arc 9018CM electrodes are recommended for welding

a) 2-1/4% chromium, 1% molybdenum steels

b) 2% nickel steels

c) 1-1/4%chromium, 1/2% molybdenum steels

7. The letter-number suffix - B2 of the classification number indicates that the weld metal contains

a) 1/2% molybdenum

b) 1-1/4% chromium, 1/2% molybdenum

c) 2-1/4% chromium, 1% molybdenum

8. The alloy chromium in low alloy weld metal

a) increases the high temperature scaling resistance

b) decreases the high temperature scaling resistance

c) has no affect on the scaling resistance

9. The tempering temperature of Atom Arc 4130 weld metal has what effect on the tensile strength?

• a) Higher tempering temperature raises the tensile strength

(_ b) Higher tempering temperature lowers the tensile strength

c) Higher tempering temperature has no affect on the tensile strength

10. Low alloy electrodes are most often selected to match

a) the exact chemical composition of the steel

b) the mechanical properties of the steel

c) the trade name of the steel

11. Quenched and tempered low alloy, high strength steels such as USS T1 and HY-80 are welded with

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AWTC Chapter 4

a) Atom Arc 8018CM electrodes

b) Atom Arc "T" electrodes

c) Atom Arc 9018HT electrodes

12. With few exceptions, the chemical analysis of the core wire in low alloy electrodes determines the chemical analysis of the deposited weld metal.

a) TRUE

b) FALSE

13. Rapidly cooling the heat affected zone in hardenable steels is a way to add strength to a welded joint.

a) TRUE

b) FALSE

14. The letter-number suffix - C3 of the classification number indicates that the weld metal contains

a) 2-1/4% chromium, 1% molybdenum

b) 1% nickel

c) 1/2% molybdenum

15. Atom Arc 4130LN may be used to weld

a) weathering steel

b) aluminum

c) oil field equipment which handles sour crude

16. To quench low alloy steel, it is heated and

a) cooled rapidly from below the transformation temperature

b) cooled slowly from above the transformation temperature

c) cooled rapidly from above the transformation temperature

17. American Welding Society Specification A5.5 -96 specifies

a) the color of the electrode covering

b) the minimum mechanical properties of the weld metal

c) the method of manufacturing electrodes

18. Atom Arc 8018CM electrodes are primarily recommended for welding

a) 2-1/4% chromium, 1% molybdenum steels

b) 2% nickel steels

c) 1-1/4%chromium, 1/2% molybdenum steels

19. The alloy element molybdenum in low alloy weld metal

a) reduces the tensile strength

b) decreases the crack resistance

c) causes the as welded and stress-relieved yield and tensile strength to remain constant

20. Molecular hydrogen is harmful when welding high tensile hardenable steels because

a) it burns explosively

b) it is lighter than air

c) it may cause tremendous pressure in the HAZ

21. After a low hydrogen electrode container is opened, those electrodes which are not intended for use within a given period of time must be

a) scrapped

b) stored in an oven

c) reconditioned

d) placed in a paper bag

22. In fillet welding quenched and tempered steels, toe cracking may be corrected by

a) using higher strength weld metal



b) using lower strength weld metal

c) using similar strength weld metal

23. Underbead cracking is usually caused by two factors working together

0 a) Hardenable steels and fast welding speeds

• b) Hardenable steels and presence of hydrogen

O c) Presence of hydrogen and fast welding speeds

24. Stress-relieving of a weldment is performed by heating the weldment to a temperature a) above the transformation temperature

b) below the transformation temperature

c) the same as the transformation temperature

25. The in low hydrogen electrodes must be kept to a minimum.

C; a) alloys

O b) iron powder

CO c) moisture

• d) coating diameter

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AWTC Chapter 5 Welding Filler Metals for Stainless Steels


1. The four categories of stainless steels derive their respective names from

c a) the man who discovered them

• b) the crystal structure usually found in them at room temperature • c) their appearance

( d) their mechanical properties

2. E410 covered stainless electrodes are

c a) austenitic

b) martensitic

c) ferritic

• d) none of these

3. Cast iron has

( a) low carbon

b) medium carbon

( c) high carbon

4. Arcaloy 8N12 electrodes are primarily intended for weldments in service at

a) very high temperatures

b) very low temperatures

c) room temperature

5. Cupro Nickel electrodes are primarily used to weld structures for service involving

a) high temperature

b) low temperature

c) sea water

d) none of these

6. A small amount of ferrite in austenitic steel welds

a) increases weld cracking

b) decreases weld cracking

c) has no affect on weld cracking

7. Arcaloy bare stainless electrodes are classified according to AWS Specification

a) A5.1

b) A5.4

c) A5.9

8. Which one of the stainless steel categories does not normally require preheat to weld?

a) austenitic

b) martensitic

c) ferritic

9. Manual gas tungsten arc welding usually requires filler metal in the physical condition

a) spooled

b) coiled

c) straightened and cut lengths

10. Arcaloy covered stainless steel electrodes have a core wire of

a) mild steel

b) low alloy steel


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AWTC Chapter 5

c) stainless steel d) flux cored wire

11. Carbide precipitation in austenitic stainless steel welds, which are subject to a corrosive atmosphere, affects the L_ a) tensile strength of the weld metal

b) ductility of the weld metal C c) corrosion resistance in the heat affected zone C d) Charpy V-notch impact of the weld metal

12. In a stainless steel welding application where the majority of the welds are in the vertical or overhead position, and the welds are subjected to heavy loads, the best choice of coated electrode would

a) EXXX-16 (AC-DC titania)

b) EXXX-17 (PLUS)

c) EXXX-15 (Lime)

13. Cupro Nickel electrodes deposit weld metal typically composed of

a) 70% nickel - 30% copper

b) 68% copper - 30% nickel c) 70% chromium - 30% nickel

d) 30% nickel - 70% chromium

14. Nickel-Arc 55 deposits weld metal containing about

a) 55% iron

b) 55% chromium

c) 55% nickel

15. Nickel-Arc 99 deposits weld metal in gray cast iron which is

a) not machinable

b) machinable

16. The ferrite content of Core-Bright weld metal varies with the

/C a) oxygen content

b) nitrogen content

C c) hydrogen content

17. Arcaloy covered stainless steel electrodes are classified according to AWS Specification a) A5.1-91

b) A5.4-92

c) A5.9-93

18. Core-Bright electrodes are

a) flux cored continuous electrodes b) flux cored and covered electrodes

c) solid and cut-to-length electrodes

When welding steels together, which are similar metallurgically but dissimilar chemically, the electrodes selected to weld them should match

a) the higher alloy or cost

b) the lower alloy or cost

c) makes no difference

20. White iron can be welded with either Nickel-Arc 55 or 99 without cracking.

a) TRUE

b) FALSE

21. To weld type 304 stainless steel to mild steel (different types metallurgically and chemically), the coated electrode selected should be

a) E308 to match the 304


9/28/2018 • .

O b) E7018 to match

O c) E309 to absorb the dilution

AWTC Chapter 5

22. A customer wants to weld abrasion resisting steel together. What type of Arcaloy electrode would be best for this weld?

O a) Type 308 O b) Type 347

O c) Type 312

23. Arcaloy 9N10 electrodes are Intended for welding O a) stainless steel • b) Monel

• c) neither of these

24. AWS Type 000C-16 electrodes must be used with: • a) alternating current • b) direct current, electrode negative O c) either A or D • d) direct current, electrode positive

25. Martensltic stainless steels, as compared to austenitic stainless steels, are • a) lower cost O b) higher cost O c) about the same cost

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AWTC Chapter 1 Chapter 1 - wcvtc.wyom.k12.wv.uswcvtc.wyom.k12.wv.us/WeldingNTID.pdf · AWTC Chapter 1 Chapter 1 Please answer the following questions, then press the "Grade My Test"