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Total Questions : 350
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Answer: Option C. -> Both (A) and (B)
Blackheart cast iron. and Whiteheart cast iron has similar properties to steel
Blackheart cast iron. and Whiteheart cast iron has similar properties to steel
Answer: Option B. -> The average grain size is a minimum
When low carbon steel is heated up to upper critical temperature, the average grain size is a minimum.
When low carbon steel is heated up to upper critical temperature, the average grain size is a minimum.
Answer: Option A. -> There is no change in grain size
When low carbon steel is heated up to lower critical temperature There is no change in grain size
When low carbon steel is heated up to lower critical temperature There is no change in grain size
Answer: Option C. -> Is same for all steels
The lower critical temperature is same for all steels.
Lower critical temperature for steel’s austenite-to-pearlite transformation is 1333°Fahrenheit (723°Celsius). Below this temperature, austentite doesn’t exist.
The lower critical temperature is same for all steels.
Lower critical temperature for steel’s austenite-to-pearlite transformation is 1333°Fahrenheit (723°Celsius). Below this temperature, austentite doesn’t exist.
Answer: Option A. -> 770°C
Below 773°C (1,423°F), alpha iron becomes ferromagnetic (i.e., capable of being permanently magnetized), indicating a change in electronic structure but no change in crystal structure.
Below 773°C (1,423°F), alpha iron becomes ferromagnetic (i.e., capable of being permanently magnetized), indicating a change in electronic structure but no change in crystal structure.
Answer: Option B. -> Product of blast furnace made by reduction of iron ore
Pig iron is the intermediate product extracted from iron ore in a blast furnace.
Pig iron is used as raw material in steel making.
Pig iron gets its name from the old fashioned method of casting the iron into moulds arranged in sand beds so that they could be fed from a common runner
Pig iron is the intermediate product extracted from iron ore in a blast furnace.
Pig iron is used as raw material in steel making.
Pig iron gets its name from the old fashioned method of casting the iron into moulds arranged in sand beds so that they could be fed from a common runner
Answer: Option D. -> All of the above
1.The unit cells Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
2. The unit cells Have the same orientation and their similar faces are parallel
3. The unit cells May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
1.The unit cells Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
2. The unit cells Have the same orientation and their similar faces are parallel
3. The unit cells May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice
Answer: Option A. -> Silicon
Silicon is the impurity in cast iron which promotes graphite nodule formation and increases the fluidity of the molten metal.
Silicon is the impurity in cast iron which promotes graphite nodule formation and increases the fluidity of the molten metal.
Answer: Option D. -> Nichrome
Nichrome is a nickel-chromium alloy with non-magnetic properties.
Nichrome is a nickel-chromium alloy with non-magnetic properties.
Answer: Option C. -> Highly resistant to corrosion
Wrought iron is soft, ductile, magnetic, and has high elasticity and tensile strength. It can be heated and reheated and worked into various shapes.
Wrought iron is soft, ductile, magnetic, and has high elasticity and tensile strength. It can be heated and reheated and worked into various shapes.
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