Engineering Materials problems
- 1. Combined carbon in iron makes the metal
Options- A. soft and gives coarse grained crystalline structure
- B. soft and gives a fine grained crystalline structure
- C. hard and gives a coarse grained crystalline structure
- D. hard and gives a fine grained crystalline structure Discuss
Correct Answer: hard and gives a fine grained crystalline structure
- 2. The machinability of steel is improved by adding
Options- A. nickel
- B. chromium
- C. nickel and chromium
- D. sulphur, lead and phosphorus Discuss
Correct Answer: sulphur, lead and phosphorus
- 3. The aluminium alloy, mainly used, for anodized utensil manufacture, is
Options- A. duralumin
- B. Y-alloy
- C. magnalium
- D. hindalium Discuss
Correct Answer: hindalium
- 4. The blade of a power saw is made of
Options- A. boron steel
- B. high speed steel
- C. stainless steel
- D. malleable cast iron Discuss
Correct Answer: high speed steel
- 5. The alloying element which can replace tungsten in high speed steels is
Options- A. nickel
- B. vanadium
- C. cobalt
- D. molybdenum Discuss
Correct Answer: molybdenum
- 6. An aluminium alloy with 11% silicon is used for making engine pistons by die casting technique.
Options- A. Yes
- B. No Discuss
Correct Answer: Yes
- 7. The ability of a material to undergo large permanent deformation with the application of a tensile force, is called ductility.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 8. The brown smoke during the operation of a bessemer Converter indicates that the
Options- A. air is burning out silicon and managanese
- B. silicon and manganese has burnt and carbon has started oxidising
- C. the converter must be titled to remove the contents of the converter
- D. the brown smoke does not occur during the operation of a bessemer converter Discuss
Correct Answer: air is burning out silicon and managanese
- 9. Pearlite consists of
Options- A. 13% carbon and 87% ferrite
- B. 13% cementite and 87% ferrite
- C. 13% ferrite and 87% cementite
- D. 6.67% carbon and 93.33% iron Discuss
Correct Answer: 13% cementite and 87% ferrite
- 10. The carbon in the pig iron varies from
Options- A. 0.1 to 0.5%
- B. 0.5 to 1%
- C. 1 to 5%
- D. 5 to 10% Discuss
Correct Answer: 1 to 5%
More in Mechanical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.