Metals Flashcards

1
Q

What is smelting?

A

The process of refining the ores to extract pure metals.

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2
Q

When was the cast iron age?

A

1850 - late 1880s

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3
Q

What was the first building considered to be a skyscraper? Who was it by? And when?

A

A 10 story home insurance building in Chicago by William Le Baron Jenney in 1885.

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4
Q

What is annealing?

A

The process of metal being reheated and slowly cooled to obtain a more ductile metal.

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5
Q

Heating metal to a certain temperature and then rapidly cooling it by submersion in water or other liquid is?

A

Quenching. It strengthens steel.

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6
Q

What are the three general types of metal finishes?

A

Mechanical finishes, Chemical finishes, and Coatings

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7
Q

Gage sizing is roughly based on _______.

A

The weight of a square foot of material.

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8
Q

What is galvanic action?

A

The corrosion resulting when dissimilar metals come in contact with each other in the presence of moisture.

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9
Q

What are the two major classifications of metals and what is the difference?

A

Ferrous and Non-Ferrous Ferrous metals contain iron and nonferrous don’t.

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10
Q

Wrought iron has a very _____ carbon content.

A

Low- making it soft, ductile, and resistant to corrosion.

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11
Q

Cast Iron has a very _____ carbon content.

A

High- making is very hard, but brittle.

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12
Q

What are some of the advantages of steel?

A

High strength, ductility, uniformity of manufacture, variety of shapes and sizes, ease and speed of construction

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13
Q

What are some disadvantages of steel?

A

Reduction in strength when subjected to fire and its tendency to corrode in the presence of moisture.

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14
Q

How much carbon does standard structural steel contain?

A

.20% - .50%

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15
Q

What is the most common type of steel for structural use?

A

ASTM A36

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16
Q

What are the primary types of ferrous metals used in construction?

A

Iron, Steel, Stainless Steel, and other special steel alloys.

17
Q

What are the primary types of nonferrous metals used in construction?

A

Aluminum, Copper, and Copper Alloys (Brass & Bronze)

18
Q

One of the primary disadvantages of ______(type of metal) is the amount of energy required for its refining and manufacture?

A

Aluminum

19
Q

What is a Ferrous Alloy?

A

An alloy that contains iron

20
Q

What is the Bessemer process?

A

The procedure where carbon and silicon are removed from iron to make steel

21
Q

What is Galvanic action?

A

Also know as electrolysis, is where metals in the presence of moisture exchange ions with one another, causing corrosion.

22
Q

What are cathodes?

A

Metals that are less prone to corrosion

23
Q

what are anodes?

A

Metals that are more prone to corrosion

24
Q

What is the scale of metals from Cathode to Anode?

A

Platinum (Cathode) Gold Silver Titanium Stainless Steel Brass Tungsten Chrome Nickel Copper Cast Iron Steel Lead Tin Aluminium Cadmium Galvanized Steel Zinc Magnesium (Anode) Ions move Upward

25
Q

What is a Castellated Beam, and in what application would it be used?

A

A wide flange beam that is produced by cutting the web of the beam in a zig zag pattern and then welding the beam back together. This increases the load carrying capacity of the W beam

26
Q

What is the connector used to connect two wide flange columns to each other?

A

Splice plate

27
Q

Which is more economical for floor plate construction on a 50 story tower when combined with W frame columns, flying forms or concrete poured over metal deck?

A

Flying forms