Welding_Flashcards_Complete

Question 1

List the five basic weld joints.

Answer 1

Butt joint, Lap joint, T-joint, Edge Joint, Corner Joint.

Question 2

Identify two inert gases used in the GMAW process.

Answer 2

Argon & Helium.

Question 3

What shielding gases are utilized for FCAW-G?

Answer 3

CO2 and Argon.

Question 4

In which positions can an E70T-7 FCAW-S wire be operated?

Answer 4

Flat & Horizontal.

Question 5

State the tensile strength of an E71T-8 wire for FCAW-S.

Answer 5

70,000 lbs / sq inch pressure.

Question 6

Define the four basic welding positions as per AWS standards.

Answer 6

Flat, Horizontal, Vertical & Overhead.

Question 7

Explain what the ‘S’ stands for in FCAW-S.

Answer 7

Self Shielded.

Question 8

List the two types of cored electrode wires used in FCAW.

Answer 8

Self shielded and Gas shielded.

Question 9

Describe when a flaw becomes a defect in welding.

Answer 9

When it is larger than the acceptable size or unsuitable for the intended service.

Question 10

Identify the four main deposition modes of the GMAW process.

Answer 10

Short circuit transfer, Globular transfer, Spray transfer, Pulsed spray transfer.

Question 11

What does OCV stand for in welding terminology?

Answer 11

Open Circuit Voltage.

Question 12

List the three basic types of wire feeders used for GMAW/FCAW.

Answer 12

Push feeder, Push-Pull feeder, Spool gun feeder.

Question 13

What is the recommended material for protective clothing during welding or cutting?

Answer 13

Leather.

Question 14

How should you light an oxy-fuel torch?

Answer 14

Using a friction striker.

Question 15

In what position should gas cylinders be stored?

Answer 15

Vertical.

Question 16

Do beryllium, lead, and cadmium produce toxic fumes when welded?

Answer 16

Yes, they are poisonous agents.

Question 17

Where would you find information about the thickness of the material in relation to welding?

Answer 17

On the blueprint, not on the welding symbol.

Question 18

What type of fillet weld has the weld symbols offset on the welding symbol?

Answer 18

Staggered intermittent weld.

Question 19

Describe the travel angle when the top of the electrode leads the welding end and the arc points back toward the weld bead.

Answer 19

It is called a Drag angle.

Question 20

Describe the significance of the second digit in an electrode marked E71T-5 in the FCAW designation system.

Answer 20

It refers to the welding position.

Question 21

Identify the type of shielding gas used with an E70T-1C FCAW-G electrode.

Answer 21

100% CO2.

Question 22

Explain the shielding gas composition for an E71T-1M wire in FCAW-G.

Answer 22

Mixed 75% - 80% Argon + CO2 for the balance.

Question 23

What does a number to the left of a groove weld symbol indicate if it is not in parentheses?

Answer 23

It denotes the depth of bevel.

Question 24

List the essential elements required in a welding symbol.

Answer 24

A reference line and an arrow.

Question 25

What occurs when steel with more than 0.35% carbon content reaches the A3 critical temperature?

Answer 25

It goes through a phase change or structural change.

Question 26

Determine what can be assessed through a spark test on steel or cast iron.

Answer 26

Carbon content.

Question 27

How is martensite formed in steel?

Answer 27

By rapidly quenching a steel from the austenite region.

Question 28

Characterize the properties of martensite.

Answer 28

It is hard and brittle.

Question 29

What is another term used for a discontinuity in welding?

Answer 29

Flaw.

Question 30

Define the acronym NDE in the context of welding.

Answer 30

Non-Destructive Examination.

Question 31

What does ductility refer to in metals?

Answer 31

The ability of metal to stretch or elongate before it breaks.

Question 32

Which organization has developed a code for structural welding of bridges and similar structures?

Answer 32

American Welding Society.

Question 33

Identify the shielding gas that offers the best cleaning action and lowest overall cost.

Answer 33

Argon.

Question 34

What does a flowmeter measure in relation to gas?

Answer 34

Volume.

Question 35

Which polarity is predominantly used in GMAW applications?

Answer 35

DCEP.

Question 36

Are short circuit, spray, and globular methods of GMAW transfer valid?

Answer 36

Yes, except 'solid metal' is not a recognized method.

Question 37

What effect does increasing or decreasing the wire feed speed have in FCAW or GMAW operations?

Answer 37

It increases or decreases the amperage.

Question 38

Is every defect in a weld a cause for rejection?

Answer 38

No, not every defect is cause for weld rejection.

Question 39

Define a defect in welding.

Answer 39

A defect is always 'Reject-able'.

Question 40

Describe the most severe discontinuity in welding.

Answer 40

Cracks are considered to be the most severe discontinuity.

Question 41

Explain what porosity in welding refers to.

Answer 41

Porosity results from the entrapment of gas within the weld cross section.

Question 42

What does WPS stand for in welding terminology?

Answer 42

Welding Procedure Specification.

Question 43

What action must be taken if an essential variable on a WPS is changed?

Answer 43

The procedure must be re-qualified.

Question 44

Identify the maximum size of discontinuities allowed in a bend test for D1.1 qualification.

Answer 44

A test specimen cannot have any discontinuities/defects larger than 1/8th of an Inch after bending.

Question 45

What factors can cause wire-feeding problems in welding?

Answer 45

Improper cast and helix dimensions can cause wire-feeding problems.

Question 46

What type of power source is used for GMAW and FCAW processes?

Answer 46

Constant Voltage.

Question 47

Does argon have lower heat conductivity than helium?

Answer 47

Yes.

Question 48

Explain why helium is used in welding thick sections of aluminum and copper.

Answer 48

Because of its high heat conductivity, helium is generally used to weld thick sections of aluminum and copper.

Question 49

How is the amount of welding current determined with a CV power source?

Answer 49

The amount of welding current is determined by the wire feed speed.

Question 50

What polarity do most FCAW-S electrodes operate on?

Answer 50

DCEN (Direct Current Electrode Negative).

Question 51

What are molten metal particles expelled from the electrode that do not become part of the finished weld called?

Answer 51

Spatter.

Question 52

What are pieces of weld wire that extend through the weld joint referred to as?

Answer 52

Whiskers.

Question 53

What do the last two digits of an SAE or AISI number indicate in an alloy?

Answer 53

They identify the carbon content.

Question 54

What is the term for heating a metal before welding?

Answer 54

Pre-Heating.

Question 55

What is the purpose of annealing in metalworking?

Answer 55

Annealing is to return a metal to its original softness and most ductile condition.

Question 56

What hazard do inert gases pose in confined areas?

Answer 56

Inert gases can cause suffocation in a confined area without sufficient ventilation.

Question 57

What information do Safety Data Sheets provide?

Answer 57

Safety Data Sheets detail properties and hazards of chemical products, how to store them, clean up spills, and medically treat exposure.

Question 58

Describe the process that uses a tubular flux-filled wire.

Answer 58

Flux-Core Arc Welding (FCAW) is the process that uses a tubular flux-filled wire.

Question 59

Explain the duty cycle in welding.

Answer 59

The duty cycle is the percentage of time in a ten-minute period that a machine can run at its rated output without overheating.

Question 60

Define arc voltage in welding.

Answer 60

the voltage output of the welding power source when an arc is present.

Question 61

Do FCAW operations require pressurized shielding gas?

Answer 61

No, FCAW does not always have to be operated with a pressurized shielding gas.

Question 62

Can GMAW be used in all welding positions?

Answer 62

Yes, GMAW can be operated in all positions.

Question 63

How does heat treatment relate to welding?

Answer 63

Heat treatment can occur before, during, and after welding.

Question 64

Explain the purpose of annealing steel.

Answer 64

Steel can be annealed to soften the metal, make it machinable, or relieve stress.

Question 65

Who is responsible for developing the Boiler and Pressure Vessel Code?

Answer 65

The Boiler and Pressure Vessel Code was developed by the ASME (American Society of Mechanical Engineers).

Question 66

Are inert gases used in welding odorless and colorless?

Answer 66

Yes, inert gases are odorless and colorless.

Question 67

Identify the harmful rays emitted during arc welding.

Answer 67

Ultraviolet and infrared rays are the only harmful rays emitted while arc welding.

Question 68

What is the root opening in welding?

Answer 68

The root opening is the space between two metal pieces at the bottom of the joint to be welded.

Question 69

Describe the properties of argon gas in welding.

Answer 69

Argon gas is heavier than air and tends to form a blanket around the molten weld pool.

Question 70

What is the most common shielding gas mixture for welding carbon steels with short-circuiting transfer mode?

Answer 70

The most common shielding gas mixture is C25, which is 75% Argon and 25% CO2.

Question 71

Define elongation in the context of metals.

Answer 71

Elongation refers to how much a metal can stretch before it will break.

Question 72

Explain tensile strength.

Answer 72

Tensile strength is the ability of a material to resist being pulled apart.

Question 73

What does ductility mean in metallurgy?

Answer 73

Ductility is the ability of a metal to be stretched.

Question 74

Define hardness in materials science.

Answer 74

Hardness is the resistance to penetration.

Question 75

What is toughness in relation to materials?

Answer 75

the ability to prevent a crack from growing.

Question 76

Describe compressive strength.

Answer 76

Compressive strength is the ability to withstand a squeezing force.

Question 77

Define brittleness in materials.

Answer 77

The ease of being fractured.