Engineering Materials problems
- 1. The unit cells
Options- A. contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal
- B. have the same orientation and their similar faces are parallel
- C. may be defined as the smallest parallelopiped which could be transposed in three coordinate directions to build up the space lattice
- D. all of the above Discuss
Correct Answer: all of the above
- 2. A material is said to be allotropic, if it has
Options- A. fixed structure at all temperatures
- B. atoms distributed in random pattern
- C. different crystal structures at different temperatures
- D. any one of the above Discuss
Correct Answer: different crystal structures at different temperatures
- 3. The hardness is the property of a material due to which it
Options- A. can be drawn into wires
- B. breaks with little permanent distortion
- C. can cut another metal
- D. can be rolled or hammered into thin sheets Discuss
Correct Answer: can cut another metal
- 4. Which of the following process of steel making is in operation at Tata Iron and Steel Works, Jamshedpur?
Options- A. Bessemer process
- B. Open hearth process
- C. Duplex process
- D. Electric process Discuss
Correct Answer: Duplex process
- 5. The charge is fed into the blast furnace through the
Options- A. stack
- B. throat
- C. bosh
- D. tuyers Discuss
Correct Answer: throat
- 6. The steel produced by bessemer or open hearth process is __________ to that produced by L-D process.
Options- A. superior
- B. inferior Discuss
Correct Answer: inferior
- 7. Nodular cast iron is produced by adding __________ to the molten cast iron.
Options- A. nickel
- B. chromium
- C. copper
- D. magnesium Discuss
Correct Answer: magnesium
- 8. Silicon when added to copper improves
Options- A. machinability
- B. hardness
- C. hardness and strength
- D. strength and ductility Discuss
Correct Answer: hardness and strength
- 9. The hardness of steel increases if it contains
Options- A. pearlite
- B. ferrite
- C. cementite
- D. martensite Discuss
Correct Answer: cementite
- 10. Brass is an alloy of
Options- A. copper and zinc
- B. copper and tin
- C. copper, tin and zinc
- D. none of these Discuss
Correct Answer: copper and zinc
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