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5th Sixth Month Final > TPC 105 > Flashcards

TPC 105 Flashcards

1
Q

A metal’s ability to be stretched into wire without breaking is called its _________. Its ability to return to its original shape after being deformed is called its _________.

A

Ductility; elasticity

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2
Q

Which of the following magnetic materials is an alloy?

A

Alnico

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3
Q

An alloy containing iron as the base metal is:

A

Steel

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4
Q

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

A

Melting point; Without

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5
Q

________ is the speed and ease with which a metal can be cut on a machine tool.

A

Machinability

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6
Q

Lead and tin are alloyed in various proportions to make

A

Solder

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7
Q

Lead wool can be used to form

A

Cold-welded seals

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8
Q

Which nickel alloy is commonly used for making the heating elements in toasters?

A

Nichrome

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9
Q

Galvanizing is the process of coating sheet steel with

A

Zinc

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10
Q

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

A

Yield strength

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11
Q

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

A

42,500 PSI

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12
Q

When a metal supports a heavy load at high temperature, it may undergo

A

Creep

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13
Q

The mass of a material per unit volume is called its

A

Density

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14
Q

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

A

Specific gravity

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15
Q

Permanent-mold casting uses

A

Both metal and sand cores

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16
Q

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

A

Centrifugal

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17
Q

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

A

Fastest; Nonferrous

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18
Q

Upsetting is the most common method of

A

Cold forging

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19
Q

Pulling rod stock through a tapered die produces

A

Wire

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20
Q

Because of its higher carbon content, ________ has a lower melting point than _________.

A

Cast iron; Steel

21
Q

Carbon in cast iron generally makes the metal easier to

A

Break

22
Q

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

A

Softer; More

23
Q

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

A

High-alloy

24
Q

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

A

Steel

25
Q

The most important element added to iron in making steel is

A

Carbon

26
Q

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

A

Chemical composition; Steel

27
Q

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

A

Color; Burst

28
Q

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

A

Commercial

29
Q

All stainless steels contain

A

Chromium

30
Q

Uneven heating and cooling of metal parts during welding causes

A

Distortion

31
Q

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

A

Cooled slowly

32
Q

Before welding a broken gear, you should _________ it in order to avoid distortion.

A

Preheat

33
Q

Steels that are ______ generally have a ______-carbon content.

A

Forged; Low

34
Q

High-carbon steels contain __________ percent carbon.

A

0.55 to 1.00

35
Q

Copper alloys are made harder by

A

Cold-working

36
Q

Copper alloys that contain lead are relatively _________ to _________.

A

Easy; Machine

37
Q

What copper alloy contains 36% to 50% zinc?

A

Beta brass

38
Q

Muntz metal is the strongest

A

Brass

39
Q

What copper alloy is most widely used for casting?

A

Ounce metal

40
Q

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

A

Cladding

41
Q

What causes aluminum to lose its strength during welding?

A

Increased temperature

42
Q

Intermediate-temperature solders melt and flow at temperatures of _________ to _________

A

500-700 F

43
Q

When aluminum is exposed to the air, a layer of __________ forms on the surface.

A

Oxide

44
Q

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

A

6

45
Q

The two methods of extracting magnesium from brines and ores are _________ and _________.

A

Electrolysis; Reduction

46
Q

Which magnesium casting alloys have the lowest yield strength at high temperatures?

A

AZ

47
Q

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

A

Annealed

48
Q

Magnesium parts should be gas welded

A

Only in emergencies

49
Q

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

A

Titanium; Argon

5th Sixth Month Final (4 decks)

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