1. percentage of carbon present
2. control of amount, type, size and distribution of various carbon formations
3. heat treatment
4. all of these
control of amount, type, size and distribution of various carbon formations
1. half
2. double
3. approximately same
4. none of these
approximately same
1. more
2. less
3. same
4. none of these
more
1. rubber
2. plastics
3. crystalline materials
4. non-crystalline organic polymers
non-crystalline organic polymers
1. cutting tools
2. connecting rods
3. electrical industry
4. chemical industry
electrical industry
1. makes the iron soft and easily machinable
2. reduces the ability of iron to retain carbon in chemical combination
3. increases hardness and brittleness
4. all of these
reduces the ability of iron to retain carbon in chemical combination
1. visco elastic
2. anelastic
3. isentropic
4. resilient
visco elastic
1. hard and brittle
2. machinable
3. malleable
4. casting unsound
casting unsound
1. by quick cooling of molten cast iron
2. by adding magnesium to molten cast iron
3. from white cast iron by annealing
4. none of these
by quick cooling of molten cast iron
1. increases machinability
2. decreases machinability
3. increases carbon percentage
4. decreases carbon percentage
decreases machinability