Tpc 105

Front 1

A metals ability to stretch into wire without breaking is its _____. Its ability to return to its original shape after being deformed is called its _____.

Back 1

Ductility, Elasticity

Front 2

Which of the following magnetic materials is an alloy?

Back 2

Alnico

Front 3

A solid and liquid can exist together at the _____. Adding heat melts more of the solis _____ changing the temperature

Back 3

Melting point...without

Front 4

An alloy containing iron as the base metal is

Back 4

Steel

Front 5

Machinability is the speed and ease with which a metal

Back 5

Can be cut on a machine tool

Front 6

The maximum amount of stress a material can exert is called its

Back 6

Yield strength

Front 7

A standard tensile test specimen exserts a resistance force of 8500 lbs. What is the stress in the specimen?

Back 7

42,500 lbs

Front 8

When a metal supports a heavy load at high temperatures it may undergo

Back 8

Creep

Front 9

The mass of a material per unit volume is called its

Back 9

Density

Front 10

The ratio of a material's density compared to the density of water is called its

Back 10

Specific gravity

Front 11

Permanent mold casting uses

Back 11

Both metal cores and sand cores

Front 12

The method of casting metal parts using a spinning method to force the molten metal away from the center and against the sides of the mold is called ______ casting

Back 12

Centrifugal

Front 13

Die casting is the _____ of all casting methods. It is used to cast _____ metals.

Back 13

Fastest.....nonferrous

Front 14

Upsetting is the most common method of

Back 14

Cold forging

Front 15

Pulling rod stock through a tapered die produces

Back 15

Wire

Front 16

Because of its higher carbon content_____ has a lower melting point than _____.

Back 16

Cast iron.....steel

Front 17

Carbon in cast iron generally makes the metal easier to

Back 17

Pour

Front 18

Malleable cast iron is _____ than white cast iron and has _____ resistance to wear than gray cast iron.

Back 18

Softer.....more

Front 19

What kind of cast iron is best for parts that must be hard and strong but not brittle

Back 19

High alloy

Front 20

Open-hearth, basic oxygen and electric are three types of furnaces used for making

Back 20

Steel

Front 21

The most important element added to iron in making steel is

Back 21

Carbon

Front 22

AISI and SAE are number coding systems that specify the _____ of each kind of _____.

Back 22

Chemical composition.....steel

Front 23

When spark testing to identify a steel, you should consider spark length, _____ and _____.

Back 23

Color.......burst

Front 24

The cold-rolled sheet steel rated _____ quality has a matte finish that holds paint well.

Back 24

Commercial

Front 25

All stainless steels contain

Back 25

Carbon

Front 26

Uneven heating and cooling of metal parts during welding causes

Back 26

Distortion

Front 27

In annealing, a metal should be heated to temperature above its critical temperature and then

Back 27

Cooled slowly

Front 28

Before welding a broken gear you should _____ it in order to avoid distortion

Back 28

Pre heat

Front 29

Steels that are _____ usually have a _____ carbon content.

Back 29

Cast.......low

Front 30

High carbon steels contain _____ per cent carbon

Back 30

.55 - 1.00

Front 31

Copper alloys are made stronger by

Back 31

Cold working

Front 32

Copper alloys that contain lead are relatively_____ to _____

Back 32

Easy.....machine

Front 33

What copper alloy contains 36% to 50% zinc

Back 33

Beta brass

Front 34

Muntz metal is the strongest

Back 34

Brass

Front 35

What copper alloy is most widely used for casting

Back 35

Ounce metal

Front 36

When aluminum is exposed to the air a layer of ______ is formed on the surface

Back 36

Oxyde

Front 37

In the four-digit aluminum. designation number 6053, which digit signifies the main alloying element?

Back 37

6

Front 38

The process of rolling a thin layer of aluminum onto a base metal is called

Back 38

Cladding

Front 39

What causes aluminum to lose its strength during welding

Back 39

Increased temperature

Front 40

Intermediate-temperature solders melt and flow at temperatures of ___ to ___.

Back 40

500 - 700 F

Front 41

the two methods of extracting magnesium from brines and ores are _____ and _____.

Back 41

Electrolysis and reduction

Front 42

What magnesium casting alloys have the lowest yield strength at high temperatures

Back 42

AZ

Front 43

The letter "a" following the designation for a rolled sheet of magnesium stands for

Back 43

Annealed

Front 44

Magnesium parts should be gas welded

Back 44

Only in emergencies

Front 45

Typical melting and casting methods cannot be used for _____. It can be arc melted using _____ gas.

Back 45

Titanium.....Argon

Front 46

Lead and tin are alloyed in various proportions to make

Back 46

Solder

Front 47

Lead wool can be used to

Back 47

Form cold welded seals

Front 48

Which nickel alloy is commonly used to make the heating element in toasters

Back 48

Nichrome

Front 49

Galvanizing is the process of coating sheet steel with

Back 49

Zinc

Front 50

Which of the following should you use as a lubricant when machining zinc?

Back 50

Lard oil