Metals

Question 1

What is smelting?

Answer 1

The process of refining the ores to extract pure metals.

Question 2

What is annealing?

Answer 2

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

Question 3

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

Answer 3

Quenching. It strengthens steel.

Question 4

What are the three general types of metal finishes?

Answer 4

Mechanical finishes, Chemical finishes, and Coatings

Question 5

Gage sizing is roughly based on _______.

Answer 5

The weight of a square foot of material.

Question 6

What is galvanic action?

Answer 6

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

Question 7

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

Answer 7

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

Question 8

Wrought iron has a very _____ carbon content.

Answer 8

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

Question 9

Cast Iron has a very _____ carbon content.

Answer 9

High- making is very hard, but brittle.

Question 10

What are some of the advantages of steel?

Answer 10

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

Question 11

What are some disadvantages of steel?

Answer 11

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

Question 12

How much carbon does standard structural steel contain?

Answer 12

.20% - .50%

Question 13

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

Answer 13

ASTM A36

Question 14

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

Answer 14

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

Question 15

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

Answer 15

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

Question 16

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

Answer 16

Aluminum

Question 17

What is a Ferrous Alloy?

Answer 17

An alloy that contains iron

Question 18

What is the Bessemer process?

Answer 18

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

Question 19

What is Galvanic action?

Answer 19

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

Question 20

What are cathodes?

Answer 20

Metals that are less prone to corrosion

Question 21

what are anodes?

Answer 21

Metals that are more prone to corrosion

Question 22

What is the scale of metals from Cathode to Anode?

Answer 22

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 23

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

Answer 23

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 24

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

Answer 24

Splice plate

Question 25

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 25

Flying forms