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- Question
Which of the following iron exist between 910° C and 1403° C?
Options- A. ?-iron
- B. ?-iron
- C. ?-iron
- D. ?-iron
- Correct Answer
- ?-iron
- 1. The main alloying elements high speed steel in order of increasing proportion are
Options- A. vanadium, chromium, tungsten
- B. tungsten, titanium, vanadium
- C. chromium, titanium, vanadium
- D. tungsten, chromium, titanium Discuss
- 2. In a unit cell of close packed hexagonal space lattice, there are twenty four atoms.
Options- A. Correct
- B. Incorrect Discuss
- 3. A coarse grained steel
Options- A. is less tough and has a greater tendency to distort during heat treatment
- B. is more ductile and has a less tendency to distort during heat treatment
- C. is less tough and has a less tendency to distort during heat treatment
- D. is more ductile and has a greater tendency to distort during heat treatment Discuss
- 4. Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?
Options- A. Babbit metal
- B. Monel metal
- C. Nichrome
- D. Phosphor bronze Discuss
- 5. A steel containing 16 to 18% chromium and about 0.12% carbon is called
Options- A. ferritic stainless steel
- B. austenitic stainless steel
- C. martensitic stainless steel
- D. nickel steel Discuss
- 6. In low carbon steels, __________ raises the yield point and improves the resistance to atmospheric corrosion.
Options- A. sulphur
- B. phosphorus
- C. manganese
- D. silicon Discuss
- 7. The ability of a material to resist fracture due to high impact loads, is called
Options- A. strength
- B. stiffness
- C. toughness
- D. brittleness Discuss
- 8. Iron-carbon alloys containing carbon __________ 4.3% are known as hyper-eutectic cast irons.
Options- A. equal to
- B. less than
- C. more than Discuss
- 9. An alloy of copper, tin and zinc is known as
Options- A. brass
- B. bronze
- C. gun metal
- D. muntz metal Discuss
- 10. The charge of the blast furnace consists of
Options- A. calcined ore (8 parts ), coke (4 parts) and limestone (1 part)
- B. calcined ore (4 parts), coke (1 part) and limestone (8 parts)
- C. calcined ore (1 part), coke (8 part) and limestone (4 parts)
- D. calcined ore, coke and limestone all in equal parts Discuss
Engineering Materials problems
Search Results
Correct Answer: vanadium, chromium, tungsten
Correct Answer: Incorrect
Correct Answer: is less tough and has a greater tendency to distort during heat treatment
Correct Answer: Nichrome
Correct Answer: ferritic stainless steel
Correct Answer: phosphorus
Correct Answer: toughness
Correct Answer: more than
Correct Answer: gun metal
Correct Answer: calcined ore (8 parts ), coke (4 parts) and limestone (1 part)
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