Engineering Materials MCQs

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

regains its shape and size after the removal of external forces

retains the deformation produced under load permanently

can be drawn into wires with the application of a tensile force

can be rolled or hamme

brass

bronze

gun metal

muntz metal

makes the iron soft and easily machinable

increases hardness and brittleness

makes the iron white and hard

aids fusibility and fl

50% tin and 50% antimony

66% tin, 30% copper and 4% antimony

88% tin, 4% copper and 8% antimony

92% tin, 6% copper and

nickel

chromium

nickel and chromium

sulphur, lead and phos

six

nine

fourteen

seventeen

100 N/mm2

200 N/mm2

350 N/mm2

1000 N/mm2

high compressive strength

excellent machinability

good casting characteristic

all of these

Uranium

Thorium

Niobium

all of these