Week 1

Question 1

What is a mix of two or more elements in a metal called

Answer 1

Alloy

Question 2

What element determines the basic properties of steel

Answer 2

Iron

Question 3

Stainless steels are defined by the presence of what?

Answer 3

Chromium

Question 4

The ability of a metal to resist penetration is called?

Answer 4

Hardness

Question 5

Ability of a metal to be stretched into a thin wire?

Answer 5

Ductility

Question 6

ASTM specification for steel products starts with the letter A, is what?

Answer 6

Ferrous

Question 7

What does metal do when it is heated?

Answer 7

Expands

Question 8

Give 4 different ways to identify a metal bar

Answer 8

Chip test, spark test, appearance test, magnetic test

Question 9

What are the 5 basic weld joints

Answer 9

Butt, corner, edge, lap, T

Question 10

One of the major difference between gas fusion welding and brazing is that in brazing

Answer 10

The base metal is not melted

Question 11

Which of the following are distinguishing features of a carburizing flame?

Answer 11

2 inner flame cones and an outer blue envelope

Question 12

What’s an oxy acetylene flame in order from coldest to hottest

Answer 12

Carburizing
Neutral
Oxidizing

Question 13

When the edges of two pieces of metal are heated until they flow together is called?

Answer 13

Fusion welding

Question 14

To move a pressurized cylinder short distances it can be?

Answer 14

Placed on a cylinder cart

Question 15

What serious condition is indicated when a torch emits a loud and shrill hissing sound

Answer 15

Flashback

Question 16

What are bits of slag, flux, oxides, or dirts trapped in a weld

Answer 16

Inclusions

Question 17

What metal would produce the most hazardous fumes

Answer 17

Galvanized

Question 18

What is oxy acetylene cutting confined to

Answer 18

Ferrous metals

Question 19

When storing oxygen and acetylene cylinders they can…

Answer 19

Not be stored together at all

Question 20

If you believe you have a problem with your oxygen regulator, you will

Answer 20

Replace the regulator or have it repaired by a qualified person

Question 21

The thicker the metal the smaller the oriffice required for welding? T/F

Answer 21

False

Question 22

Use of grease or oil on oxy acetylene equipment can cause and explosion? T/F

Answer 22

True

Question 23

The higher the carbon content in steel, the lower the melting point

Answer 23

True

Question 24

When installing a regulator on a gas cylinder, cracking means what?

Answer 24

Opening the valve slightly and then closing it before installing a regulator

Question 25

In a workshop you should assume all tooling is hot?

Answer 25

True

Question 26

Acetylene tanks have special right hand threads? T/F

Answer 26

False

Question 27

You may use a flame to check for leaks on a regulator or hoses? T/F

Answer 27

False

Question 28

Quenching is a process of cooling a metal slowly? T/F

Answer 28

False

Question 29

An edge joint is considered one of the strongest welding joints? T/F

Answer 29

False

Question 30

The standards for proper ventilation is set by cal fed? T/F

Answer 30

False

Question 31

The cooling rate of metal is a factor of heat treatment of steel? T/F

Answer 31

True

Question 32

The last two numbers of the AISI indicate chemical composition? T/F

Answer 32

False

Question 33

What is the basic principle of oxy acetylene flame cutting?

Answer 33

A chemical reaction process called oxidation

Question 34

The point where the weld plate meets the base metal is called

Answer 34

The toe

Question 35

Oxygen with a regulator can be used in or with

Answer 35

None of the both

Question 36

In an oxy acetylene cutting operation. One of the many safety hazards is the

Answer 36

All the above

Question 37

Low carbon steel is harder than high carbon steel

Answer 37

False

Question 38

The metallurgical composition of the filler and the ___ ____ should be close to the same metals

Answer 38

Base metal

Question 39

What do we call a metal that is harder than a file, what is its brinell hardness number

Answer 39

600+ BHN

Question 40

Welding equipment should be operated in a well ___ area

Answer 40

Ventilated

Question 41

How is the density of metal measured

Answer 41

Weight

Question 42

When oxy acetylene cutting is performed, excessive slag is a result of

Answer 42

Cutting speed too slow

Question 43

The cutting action takes place when ___ comes in contact with the red molten metal

Answer 43

Oxygen

Question 44

What is the minimum shade lens?

Answer 44

5

Question 45

Identify welding symbol, Other side Arrow side How long the weld is Pitch Drawing a side view and overhead view What process

Answer 45

Arrow side is the bottom Other side is the top Fillet is triangle with straight side on left Weld length is after the fillet symbol Concave is a U, flat is a line Pitch is the distance between each weld from center to center OAW is oxy acetylene process

Question 46

Explain safety procedure for preparing and doing an oxy acetylene cutting operation, 1-18

Answer 46

1. Make Prework safety plan 2. Make a JHA 3. Get an ok to work or clearance 4. Fill out an hot work permit 5. Get a fire watch 6. Gather PPE and fire extinguisher 7. Clear area of flammable debris 8. Protect equipment from possible damage 9. Clean and inspect cylinders from proper operation 10. Check cylinder gauges for sufficient gas pressure 11. Inspect the torch for proper operation 12. Clean torch tip 13. Light the torch 14. Safely make a cut, be aware of personnel and equipment 15. Mark materials as hot 16. Safely dispose of materials 17. Check area for possible fires 18. Sign off hot work permit, notify operations, file JHA