Welding Week 1

Question 1

5 types of welding joints

Answer 1

CBELT (Acronym)

Corner
Butt
Edge
Lap
Tee

Question 2

Strongest weld joint

Answer 2

Lap

Question 3

Junction between the face of the weld and the base metal

Answer 3

Toe of a weld

Question 4

3 major safety hazards

Answer 4

danger of falling objects
spray of sparks
fumes from burning process

Question 5

Where should compressed gas cylinders be stored?

Answer 5

Safe place with good ventilation

Question 6

T/F Acetylene and oxygen cylinders should be kept apart.

Answer 6

True

Question 7

What should you do if a regulator has a problem?

Answer 7

Replace regulator or send it off for repair

Question 8

T/F Oil and grease should be used in an oxyacetylene or oxyfuel system.

Answer 8

False

Question 9

_____ will prevent overexposure.

Answer 9

Ventilation

Question 10

_____ is indicated when a torch emits a shreik or hissing sound.

Answer 10

Flashback

Question 11

What is the minimum shade protection for oxyacetylene welding?

Answer 11

5

Question 12

What has 2 inner flame cones and a blue envelope?

Answer 12

Carburizing flame

Question 13

What produces the worst fumes for you?

Answer 13

Galvanized

Question 14

Flame temperatures

Carburizing
Neutral
Oxidizing

Answer 14

5,700
6,000
6,300

Question 15

Use a _____ to move cylinders.

Answer 15

cart

Question 16

Oxygen connectors are left/right handed

Answer 16

Right

Question 17

Acetylene and other fuels are left/right handed

Answer 17

Left

Question 18

Base principle of oxyfuel gas cutting (OGC)

Answer 18

Oxidation aided by heat

Question 19

Oxyfuel gas cutting is confined to ferrous/non-ferrous metals

Answer 19

Ferrous

Question 20

Cutting action takes place when ____ comes in contact with red molten metal.

Answer 20

Oxygen

Question 21

What is the difference in welding and brazing/soldering?

Answer 21

Base metal is not melted in brazing/soldering

Question 22

Allows metal to be stretched or otherwise changed in shape without breaking

Answer 22

Ductility

Question 23

Metal expands/contracts when it is cooled

Answer 23

Contracts

Question 24

Resistance of a metal to local penetration by a harder substance

Answer 24

Hardness

Question 25

Stress that resists sideways deformation in a metal

Answer 25

Sheer stress

Question 26

7 tests to identify metal (know 4)

Answer 26

``` Appearance Hardness Magnetic Chisel Fracture Flame or torch Spark ```

Question 27

Higher carbon content =

Answer 27

Lower melting point

Question 28

Mixture of 2 or more elements is an

Answer 28

Alloy

Question 29

_____ is the element that determines the basic properties of steel.

Answer 29

Iron

Question 30

Always assume everything is _____ in a weld booth.

Answer 30

Hot

Question 31

T/F If travel speed is too fast, welding bead will lay flat.

Answer 31

False

Question 32

T/F During welding, the most important thing is the back of the weld.

Answer 32

False

Question 33

T/F Quenching is the process of cooling metal slowly

Answer 33

False

Question 34

Standards for proper welding ventilation is set by _____.

Answer 34

CAL OSHA

Question 35

T/F Cooling rate of metal is a factor in heat treatment of steel.

Answer 35

True

Question 36

Mechanical properties are most affected by what 3 things?

Answer 36

Size Shape Spacing of grains in metal

Question 37

Stress riser causes _____.

Answer 37

Fatigue failure

Question 38

At the end of a weld _____ is normally formed.

Answer 38

A crater

Question 39

When oxyacetylene cutting is performed, excess slag is an indication that _____.

Answer 39

Cutting speed is too slow.

Question 40

Stainless steels are defined by the presence of _____.

Answer 40

Chromium

Question 41

Using a tee joint, draw a 3/8" fillet weld on arrow side.

Answer 41

Draw

Question 42

Using a tee joint, draw a 1/2" double fillet weld.

Answer 42

Draw

Question 43

Using a tee joint, draw a 1/2" fillet weld flush contour 12" long on other side of arrow AND a 1/2" fillet weld concave contour 1" long w/ 3" pitch arrow side with OAW process

Answer 43

Draw

Question 44

Study of metals or metal properties

Answer 44

Metallurgy

Question 45

Measures toughness

Answer 45

Impact test

Question 46

Metal grows when heated

Answer 46

Thermal expansion

Question 47

Identifies unknown metal by removing small amount

Answer 47

Chip test

Question 48

Metals having an iron base

Answer 48

Ferrous

Question 49

Metals containing no iron

Answer 49

Non-ferrous

Question 50

Resist surfaces penetration, indentation and abrasion

Answer 50

Hardness

Question 51

Compound of carbon and hydrogen

Answer 51

Acetylene

Question 52

Ignition inside the blowpipe

Answer 52

Flashback

Question 53

Removing hardness by cooling metal slowly

Answer 53

Annealing

Question 54

Reheating and requenching metal to remove brittleness

Answer 54

Tempering

Question 55

Resistance of being pulled apart

Answer 55

Tinsel strength

Question 56

Explain safety procedures for preparing and making oxyacetylene flame cut on an 8" H beam in the field.

Answer 56

1. PWSP (prework safety plan) 2. JHA 3. Ok to work or clearance 4. Hot work permit 5. Fire watch 6. Proper PPE and fire extinguisher 7. Clear area of flammable debris and protect equipment from potential damage 8. Check/inspect fuel cylinders for proper operation 9. Check fuel cylinders for sufficient amount of gas pressure 10. Check/inspect torch for proper operation and clean tip 11. Light torch and adjust flame 12. Safely make cut, be aware of equipment and personnel 13. Mark hot materials with chalk 14. Dispose of materials safely and check area for signs of fire 15. Sign off hot work permit, notify operations and file JHA

Question 57

Bits of slag, flux, oxides or dirt trapped in a weld.

Answer 57

Inclusions

Question 58

When edges or pieces of metal are heated until they flow together is called...

Answer 58

Fusion welding