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- Question
White cast iron has a high tensile strength and a low compressive strength.
Options- A. Yes
- B. No
- Correct Answer
- No
ExplanationWhite 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
Engineering Materials problems
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- 1. An eutectoid steel consists of
Options- A. wholly pearlite
- B. wholly austenite
- C. pearlite and ferrite
- D. pearlite and cementite Discuss
Correct Answer: wholly pearlite
- 2. 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
Correct Answer: mesomorphous material
- 3. When the steel is normalised, its
Options- A. yield point increases
- B. ductility decreases
- C. ultimate tensile strength increases
- D. all of these Discuss
Correct Answer: all of these
- 4. Haematite iron ore contains iron about
Options- A. 30%
- B. 45%
- C. 55%
- D. 70% Discuss
Correct Answer: 70%
- 5. Smelting is the process of
Options- A. removing the impurities like clay, sand etc. from the iron ore by washing with water
- B. expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
- C. reducing the ore with carbon in the presence of a flux
- D. all of the above Discuss
Correct Answer: reducing the ore with carbon in the presence of a flux
- 6. The lower critical point for all steels is
Options- A. 600°C
- B. 700°C
- C. 723°C
- D. 913°C Discuss
Correct Answer: 723°C
- 7. Iron ore is, usually, found in the form of
Options- A. oxides
- B. carbonates
- C. sulphides
- D. all of these Discuss
Correct Answer: all of these
- 8. 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
Correct Answer: resilience
- 9. 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
Correct Answer: cobalt
- 10. 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
Correct Answer: face centred cubic space lattice
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