Engineering Materials problems
- 1. When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of
Options- A. mainly ferrite
- B. mainly pearlite
- C. ferrite and pearlite
- D. pearlite and cementite Discuss
Correct Answer: ferrite and pearlite
- 2. Beryllium bronze contains
Options- A. 60% copper and 40% beryllium
- B. 80% copper and 20% beryllium
- C. 97.75% copper and 2.25% beryllium
- D. 99% copper and 1% beryllium Discuss
Correct Answer: 97.75% copper and 2.25% beryllium
- 3. In a body centred cubic space lattice, there are nine atoms out of which eight atoms are located at the corners of the cube and one atom at its centre.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 4. The addition of copper to aluminium possesses maximum strength after heat treatment and age-hardening
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 5. Sulphur 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
Correct Answer: increases hardness and brittleness
- 6. In the lower part of the blast furnace (zone of fusion), the temperature is
Options- A. 400° to 700°C
- B. 800°C to 1000°C
- C. 1200°C to 1300°C
- D. 1500°C to 1700°C Discuss
Correct Answer: 1200°C to 1300°C
- 7. There are fourteen atoms in a unit cell of
Options- A. body centred cubic space lattice
- B. face centred cubic space lattice
- C. close packed hexagonal space lattice
- D. none of these Discuss
Correct Answer: face centred cubic space lattice
- 8. Macro-structure of a material is, generally, examined by
Options- A. naked eye
- B. optical microscope
- C. metallurgical microscope
- D. X-ray techniques Discuss
Correct Answer: naked eye
- 9. Eutectoid reaction occurs at
Options- A. 600°C
- B. 723°C
- C. 1147°C
- D. 1493°C Discuss
Correct Answer: 723°C
- 10. Ball bearings are, usually, made from
Options- A. low carbon steel
- B. high carbon steel
- C. medium carbon steel
- D. chrome steel Discuss
Correct Answer: chrome steel
More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.