Discussion
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- Question
Iron ore is, usually, found in the form of
Options- A. oxides
- B. carbonates
- C. sulphides
- D. all of these
- Correct Answer
- all of these
- 1. The lower critical point for all steels is
Options- A. 600°C
- B. 700°C
- C. 723°C
- D. 913°C Discuss
- 2. White cast iron has a high tensile strength and a low compressive strength.
Options- A. Yes
- B. No Discuss
- 3. An eutectoid steel consists of
Options- A. wholly pearlite
- B. wholly austenite
- C. pearlite and ferrite
- D. pearlite and cementite Discuss
- 4. The material in which the atoms are arranged regularly in some directions but not in others, is called
Options- A. amorphous material
- B. mesomorphous material
- C. crystalline material
- D. none of these Discuss
- 5. When the steel is normalised, its
Options- A. yield point increases
- B. ductility decreases
- C. ultimate tensile strength increases
- D. all of these Discuss
- 6. The ability of a material to absorb energy in the plastic range is called
Options- A. resilience
- B. creep
- C. fatigue strength
- D. toughness Discuss
- 7. The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
Options- A. chromium
- B. nickel
- C. vanadium
- D. cobalt Discuss
- 8. The type of space lattice found in gamma-iron is
Options- A. face centred cubic space lattice
- B. body centred cubic space lattice
- C. close packed hexagonal space lattice
- D. none of these Discuss
- 9. Ferrite and pearlite makes the steel soft and ductile.
Options- A. Agree
- B. Disagree Discuss
- 10. The heat treatment process used for softening hardened steel is
Options- A. carburising
- B. normalising
- C. annealing
- D. tempering Discuss
Engineering Materials problems
Search Results
Correct Answer: 723°C
Correct Answer: No
Explanation:
White cast iron has a low tensile strength and a high compressive strength.
Source: https://en.wikipedia.org/wiki/Cast_iron#Table_of_comparative_qualities_of_cast_irons
Correct Answer: wholly pearlite
Correct Answer: mesomorphous material
Correct Answer: all of these
Correct Answer: resilience
Correct Answer: cobalt
Correct Answer: face centred cubic space lattice
Correct Answer: Agree
Correct Answer: tempering
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