Discussion
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- Question
The alloy, mainly used for corrosion resistance in stainless steels is
Options- A. silicon
- B. manganese
- C. carbon
- D. chromium
- Correct Answer
- chromium
- 1. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
Options- A. equal to
- B. less than
- C. more than Discuss
- 2. The addition of which of the following improves machining of copper?
Options- A. Sulphur
- B. Vanadium
- C. Tin
- D. Zinc Discuss
- 3. The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called
Options- A. duralumin
- B. Y-alloy
- C. magnalium
- D. hindalium Discuss
- 4. Which of the following metal shrinks most from molten state to solid state?
Options- A. Cast iron
- B. Cast steel
- C. Brass
- D. Admirality metal Discuss
- 5. Free cutting steels
Options- A. contain carbon in free from
- B. require minimum cutting force
- C. is used where rapid machining is the prime requirement
- D. can be cut freely Discuss
- 6. According to Indian standard specifications, SG 400/15 means
Options- A. spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
- B. spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
- C. spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area
- D. none of the above Discuss
- 7. Age hardening is related to
Options- A. duralumin
- B. brass
- C. copper
- D. silver Discuss
- 8. When a medium carbon steel is heated to coarsening temperature,
Options- A. there is no change in grain size
- B. the average grain size is a minimum
- C. the grain size increases very rapidly
- D. the grain size first increases and then decreases very rapidly Discuss
- 9. Cast iron is used in those parts which are subjected to shocks.
Options- A. Correct
- B. Incorrect Discuss
- 10. Delta-iron occurs between the temperature range of
Options- A. 400°C to 600°C
- B. 600°C to 900°C
- C. 900°C to 1400°C
- D. 1400°C to 1530°C Discuss
Engineering Materials problems
Search Results
Correct Answer: less than
Correct Answer: Sulphur
Correct Answer: magnalium
Correct Answer: Admirality metal
Correct Answer: is used where rapid machining is the prime requirement
Correct Answer: spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
Correct Answer: duralumin
Correct Answer: the grain size increases very rapidly
Correct Answer: Incorrect
Correct Answer: 1400°C to 1530°C
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