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- Question
A carbon steel having Brinell hardness number 100 should have ultimate tensile strength closer to
Options- A. 100 N/mm2
- B. 200 N/mm2
- C. 350 N/mm2
- D. 1000 N/mm2
- Correct Answer
- 350 N/mm2
- 1. Which of the following solids are malleable and ductile?
Options- A. Ionic solids
- B. Covalent solids
- C. Metallic solids
- D. none of these Discuss
- 2. The delta-iron possesses a body centred cubic space lattice.
Options- A. Correct
- B. Incorrect Discuss
- 3. Silicon in cast iron
Options- A. makes the iron soft and easily machinable
- B. increases hardness and brittleness
- C. makes the iron white and hard
- D. aids fusibility and fluidity Discuss
- 4. The process which improves the machinability of steels, but lowers the hardness and tensile strength, is
Options- A. normalising
- B. full annealing
- C. process annealing
- D. spheroidising Discuss
- 5. The malleability is the property of a material due to which it can be rolled or hammered into thin sheets.
Options- A. Agree
- B. Disagree Discuss
- 6. The nuts and bolts are made from silicon steel.
Options- A. Correct
- B. Incorrect Discuss
- 7. The essential constituent of a hardened steel is
Options- A. pearlite
- B. austenite
- C. martensite
- D. troostite Discuss
- 8. The steel widely used for making precision measuring instruments is
Options- A. nickel steel
- B. nickel-chrome steel
- C. high speed steel
- D. chrome-vanadium steel Discuss
- 9. Babbit metal contains
Options- A. 50% tin and 50% antimony
- B. 66% tin, 30% copper and 4% antimony
- C. 88% tin, 4% copper and 8% antimony
- D. 92% tin, 6% copper and 2% antimony Discuss
- 10. When a steel containing more than 0.8% carbon is cooled slowly below the lower critical point, it consists of
Options- A. mainly pearlite
- B. mainly ferrite
- C. ferrite and pearlite
- D. pearlite and cementite Discuss
Engineering Materials problems
Search Results
Correct Answer: Metallic solids
Correct Answer: Correct
Correct Answer: makes the iron soft and easily machinable
Correct Answer: spheroidising
Correct Answer: Agree
Correct Answer: Incorrect
Correct Answer: martensite
Correct Answer: nickel steel
Correct Answer: 88% tin, 4% copper and 8% antimony
Correct Answer: pearlite and cementite
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