Metals
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The correct units for Young’s Modulus are?
N/mm2
Non-Ferrous metals contain?
Up to 10% iron
Good ductility is required in structural steel because of?
Possible impact, explosion, earthquake, etc.
Young’s Modulus (E) of a material measures?
Stiffness
Bronze contains?
Copper
Medium carbon steels are used for construction because?
They combine strength and ductility
Wrought Iron contains? (% carbon?)
No carbon
Increasing the carbon content of steel?
Increases the U.T.S. of the steel
Steel was an important addition to the family of construction materials because of its?
Tensile strength
Cast Iron contains? (% carbon?)
More carbon than steel
Increasing the carbon content of steel?
Increases the yield strength and reduces the ductility
Global consumption is in excess 1,000,000,000 tonnes of metals per year. Of this amount, iron and steel represents?
90% of the total
Steel is an alloy of iron and?
Carbon
Designation mortar mixes are specified by?
BS 5628
Which one of the following metals would work-harden more quickly than the others? Copper, Brass, Lead or Silver?
Brass
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.
More than
Bell metal contains?
70 - 75% copper and rest tin
The composition of silver solder is?
Silver, copper, zinc
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Less than
Pipes for bicycle frames are made of
Cold rolled steel
The following element can’t impart high strength at elevated temperature
Magnesium
The percentage carbon content in wrought iron is abou?
0.02
The silicon steel is widely used for?
Generators and transformers in the form of laminated cores
Blast furnace produces following by reduction of iron ore
Pig iron