When chromium is added to alloy steel it produces:

When chromium is added to alloy steel it produces:

a. increased toughness
b. increased ductility
c. increased hardness
d. improved machinability
e. improved malleability

Answer: C

An alloy of copper, tin and sometimes zinc is:

An alloy of copper, tin and sometimes zinc is:

a. brass
b. bronze
c. white metal
d. babbitt
e. low carbon steel

Answer: B

Pig iron is:

Pig iron is:

a. made from cast iron
b. low in carbon content
c. made from iron ore
d. made from bauxite
e. white cast iron

Answer: C

Medium carbon steel becomes difficult to weld when the carbon content exceeds:

Medium carbon steel becomes difficult to weld when the carbon content exceeds:

a. 10%
b. 3.5%
c. 0.35%
d. 0.25%
e. 0.1%

Answer: C

Nickel, when added to steel:

Nickel, when added to steel:

a. improves plasticity and brittleness
b. decreases toughness and corrosion resistance
c. improves malleability
d. decreases hardness and brittleness
e. improves toughness and corrosion resistance

Answer: E

Resistance to indentation refers to a metal's property, which is:

Resistance to indentation refers to a metal's property, which is:

a. brittleness
b. elasticity
c. malleability
d. toughness
e. hardness

Answer: E

Wrought Iron:

Wrought Iron:

a. is stronger than steel
b. is corrosion resistant
c. is a non-ferrous metal
d. contains a high percentage of carbon
e. is produced by annealing

Answer: B

When nickel is added to alloy steel, it:

When nickel is added to alloy steel, it:

a. produces increased hardness
b. produces improved machinability
c. causes brittleness
d. produces improve corrosion resistance
e. produces improved elasticity

Answer: D

Malleability of a metal

Malleability of a metal

a. will usually decrease as the temperature rises
b. is checked using the charpy tester
c. means it will crack when struck with a hammer
d. usually increases with the addition of heat
e. means the same as "toughness"

Answer: D

Iron is:

Iron is:

a. made of brass
b. magnetic
c. non-corrosive
d. made of copper
e. made of copper and brass

Answer: B

Antimony, copper, or arsenic are sometimes found in:

Antimony, copper, or arsenic are sometimes found in:

a. bearing metals
b. bronze
c. copper
d. brass
e. chrome products

Answer: A

Which type of cast iron is the toughest?

Which type of cast iron is the toughest?

a. white cast iron
b. dark gray cast iron
c. wrought iron
d. pig iron
e. malleable cast iron

Answer: E

Bearing metal:

Bearing metal: 

a. is sometimes called babbitt metal
b. is sometimes called white metal
c. can be heated to any temperature
d. can be made for different types of service

Answer: A, B & D.

A bearing material composed primarily of tin and lead is called:

A bearing material composed primarily of tin and lead is called:

a. grey metal
b. bearing metal
c. lead base
d. babbitt
e. anti-friction metal

Answer: D

A material that can be drawn out or extended in length without breakage is said to be:

A material that can be drawn out or extended in length without breakage is said to be:

a. hard
b. brittle
c. ductile
d. chillled
e. malleable

Answer: C

In order to avoid residual stresses after welding, alloy steels:

In order to avoid residual stresses after welding, alloy steels:

a. cannot contain any carbon
b. must contain copper
c. are not affected by carbon content
d. should be heated before, during, and after welding
e. must be heated after welding

Answer: D

In the process of forming iron, limestone is added to:

In the process of forming iron, limestone is added to:

a. pig iron molds
b. the iron ore in the molds
c. the molten iron ore in order to form slag
d. making the resulting pig iron more malleable
e. increase the pig iron elasticity

Answer: C