Metals

Question 1

What is smelting?

Answer 1

The process of refining the ores to extract pure metals.

Question 2

When was the cast iron age?

Answer 2

1850 - late 1880s

Question 3

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

Answer 3

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

Question 4

What is annealing?

Answer 4

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

Question 5

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

Answer 5

Quenching. It strengthens steel.

Question 6

What are the three general types of metal finishes?

Answer 6

Mechanical finishes, Chemical finishes, and Coatings

Question 7

Gage sizing is roughly based on _______.

Answer 7

The weight of a square foot of material.

Question 8

What is galvanic action?

Answer 8

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

Question 9

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

Answer 9

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

Question 10

Wrought iron has a very _____ carbon content.

Answer 10

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

Question 11

Cast Iron has a very _____ carbon content.

Answer 11

High- making is very hard, but brittle.

Question 12

What are some of the advantages of steel?

Answer 12

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

Question 13

What are some disadvantages of steel?

Answer 13

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

Question 14

How much carbon does standard structural steel contain?

Answer 14

.20% - .50%

Question 15

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

Answer 15

ASTM A36

Question 16

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

Answer 16

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

Question 17

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

Answer 17

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

Question 18

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

Answer 18

Aluminum

Question 19

What is a Ferrous Alloy?

Answer 19

An alloy that contains iron

Question 20

What is the Bessemer process?

Answer 20

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

Question 21

What is Galvanic action?

Answer 21

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

Question 22

What are cathodes?

Answer 22

Metals that are less prone to corrosion

Question 23

what are anodes?

Answer 23

Metals that are more prone to corrosion

Question 24

What is the scale of metals from Cathode to Anode?

Answer 24

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

Question 25

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

Answer 25

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

Question 26

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

Answer 26

Splice plate

Question 27

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?

Answer 27

Flying forms