six
nine
fourteen
seventeen
✅ The correct answer is option B.
Engineering Materials MCQs
Admirality gun metal contains
60% copper, 35% zinc and 5% manganese
76% copper, 20% silicon and 4% zinc
82% copper, 12% zinc and 6% manganese
88% copper, 10% tin an
✅ The correct answer is option D.
Iron-carbon alloys containing 4.3% carbon are known as hypo-eutectic cast irons.
Correct
Incorrect
✅ The correct answer is option B.
Silicon bronze contains
60% copper, 35% zinc and 5% manganese
88% copper, 10% tin and 2% zinc
96% copper, 3% silicon and 1% manganese
76% copper, 20% silico
✅ The correct answer is option C.
The austenite is a solid solution of carbon or iron carbide in gamma-iron.
Correct
Incorrect
✅ The correct answer is option A.
The ability of a material to undergo large permanent deformation with the application of a tensile force, is called ductility.
Correct
Incorrect
✅ The correct answer is option A.
The process of inducing carbon to __________ carbon steels in order to give it a hard surface is known as carburising.
low
medium
high
✅ The correct answer is option A.
In high speed steels, vanadium adds to the property of red hardness and tungsten and chromium add to high wear resistance.
TRUE
FALSE
✅ The correct answer is option A.
The alloying element which reduces the formation of iron sulphide in steel is
chromium
nickel
vanadium
manganese
✅ The correct answer is option D.
Silicon in cast iron
makes the iron soft and easily machinable
increases hardness and brittleness
makes the iron white and hard
aids fusibility and fl
✅ The correct answer is option A.