Engineering Materials problems
- 1. Quenching is not necessary when hardening is done by
Options- A. case hardening
- B. flame hardening
- C. nitriding
- D. any one of these Discuss
Correct Answer: nitriding
- 2. In induction hardening __________ is high.
Options- A. current
- B. voltage
- C. frequency
- D. temperature Discuss
Correct Answer: frequency
- 3. The metal suitable for bearings subjected to light loads, is
Options- A. silicon bronze
- B. white metal
- C. monel metal
- D. phosphor bronze Discuss
Correct Answer: phosphor bronze
- 4. Monel metal is an alloy of
Options- A. nickel and copper
- B. nickel and chromium
- C. nickel, chromium and iron
- D. copper and chromium Discuss
Correct Answer: nickel and copper
- 5. The toughness of a material __________ when it is heated.
Options- A. remains same
- B. decreases
- C. increases Discuss
Correct Answer: decreases
- 6. A steel with carbon above 0.8% is known as hyper-eutectoid steel.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 7. Hindalium is an alloy of aluminium and magnesium with a small quantity of chromium.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Agree
- 8. 18-4-1 high speed steel contains
Options- A. vanadium 4%, chromium 18% and tungsten 1%
- B. vanadium 1%, chromium 4% and tungsten 18%
- C. vanadium 18%, chromium 1% and tungsten 4%
- D. none of the above Discuss
Correct Answer: vanadium 1%, chromium 4% and tungsten 18%
- 9. The type of space lattice found in alpha-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: body centred cubic space lattice
- 10. The property of a material essential for spring materials is
Options- A. stiffness
- B. ductility
- C. resilience
- D. plasticity Discuss
Correct Answer: resilience
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