ANSWER 1
How many metals are there on the periodic table?
A) about 21
B) about 91
C) about 71
B) about 91
The resistance of a material to being scratched:
a) What is STRENGHT?
b) What is LUSTRE?
c) What is HARDNESS?
c) What is HARDNESS?
TRUE OR FALSE:
All metals are magnetic.
It's the ability of a substance to be hammered or beaten into thin sheets.
A) What is MALLEABILITY?
B) What is CONDUCTIVITY?
C) What is DUCTILITY?
A) What is MALLEABILITY?
The first metal to be discovered was:
a) iron
b) copper
c) bronze
Which one of these sentences is true?
A) Steel doesn't rust but it corrodes.
B) Aluminium rusts and corrodes.
C) Aluminium doesn't rust but it corrodes.
D) Steel rusts and corrodes
C) Aluminium doesn't rust but it corrodes.
It's the study of production and properties of metals.
What is metallurgy?
How do we call the ability of a material to conduct heat or electricity?
It means that it doesn't contain iron.
What does non-ferrous mean?
Mercury.
What are the most common non-ferrous materials used in mechanics?
Copper, zinc, tin and aluminium.
Lathe, milling machine, shaper, grinder
Tell me the name of 4 machine tools
Tell the name of at least 5 metals
Gold, Silver, Bronze, Iron, Steel, Lead, Brass, Tin, Copper, Cast Iron, Zinc, etc.
How can we divide metals?
What's so special about "noble" metals?
A) they are only used by rich people
B) they in gaseous form
C) they are highly resistant to oxidation and corrosion
D) they are very easy to find
C) they are highly resistant to oxidation and corrosion
How do we call the ability of a material to being drawn into wires?
DUCTILITY
Yes, it does. Steel is very shiny.
Does steel have luster?
What is an alloy?
It's the mix of two metals (e.g. Bronze = Tin + Copper) or a metal and a non-metal (Steel = Iron + Carbon)
They are special rocks, found through mining, from which we can obtain some metals.
What are ORES?
What are the most abundant metals found naturally?
Iron and aluminium.
Tell me at least 3 properties of metals
Conductivity, ductility, malleability, lustre, hardness, strenght
It's the process by which metal is heated and shaped by a compressive force using a hammer or a press.
What is forging?
Tell me at least 5 heat processes that involve metals
Casting, forging, drawing, tempering, annealing, rolling, sheet metal forming, extrustion
How do we call somebody who works with metals?
What is Tour Eifell made of?
Wrought Iron.