Discussion
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- Question
The catalysts are used to accelerate the chemical reaction during the process of ploymerisation of plastics.
Options- A. True
- B. False
- Correct Answer
- True
- 1. The addition of magnesium to cast iron increases its
Options- A. hardness
- B. ductility and strength in tension
- C. corrosion resistance
- D. creep strength Discuss
- 2. Steel containing 0.8 to 1.5% carbon, is known as
Options- A. mild steel
- B. dead mild steel
- C. medium carbon steel
- D. high carbon steel Discuss
- 3. Vanadium when added to steel
Options- A. increases tensile strength
- B. decreases tensile strength
- C. raises critical temperature
- D. Sowers critical temperature Discuss
- 4. A steel with 0.8% carbon and 100% pearlite is called
Options- A. eutectoid steel
- B. hypo-eutectoid steel
- C. hyper-eutectoid steel
- D. none of these Discuss
- 5. Killed steels
Options- A. have minimum impurity level
- B. are produced by L-D process
- C. have almost zero percentage of phosphorus and sulphur
- D. are free from oxygen Discuss
- 6. In spot welding, the spacing between two spot weld should not be less than
Options- A. d
- B. 1.5 d
- C. 3 d
- D. 6 d Discuss
- 7. When the weld is made from left to right, it is known as back-hand welding.
Options- A. Agree
- B. Disagree Discuss
- 8. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
Options- A. t
- B. 1.5 t
- C. 3 t
- D. 6 t Discuss
- 9. If the sand is too fine, its permeability will be high.
Options- A. True
- B. False Discuss
- 10. The cold working of metals is carried out
Options- A. at the recrystallisation temperature
- B. below the recrystallisation temperature
- C. above the recrystallisation temperature
- D. at any temperature Discuss
Engineering Materials problems
Search Results
Correct Answer: ductility and strength in tension
Correct Answer: high carbon steel
Correct Answer: increases tensile strength
Correct Answer: eutectoid steel
Correct Answer: are free from oxygen
Correct Answer: 3 d
Correct Answer: Agree
Correct Answer: 6 t
Correct Answer: False
Correct Answer: below the recrystallisation temperature
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