31. Porous product can be effectively produced by using A. Powder metallurgy B. casting C. forging D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
32. With regard to BET gas adsorption method and Darcy's gas permeability method, which of the following is true A. Both these methods take into account only the open pores B. Both these methods take into account only the closed pores C. BET method measures surface area related to both closed pores as well as open pores D. Gas permeability method measures surface area related to both closed pores as well as open pores Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
33. Metal powders treatment is refer to A. improve physical properties B. improve chemical properties C. improve electrical properties D. improve physical and chemical properties Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
34. Usually powder particles show this kind of distribution A. Poisson distribution B. Normal distribution C. Random distribution D. Log-Normal distribution Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
35. Which of the following is highest density in sintering process A. apparent density B. green density C. sinter density D. tap density Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
36. The driving force of the sintering process depends on the term/terms A. Stress B. Vapour pressure C. vacancy concentration D. Stress, vapour pressure and vacancy concentration Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
37. The increase in density and strength of powder compacts for a given strip thickness can be achieve by A. increase in roll diameter B. decrease in roll diameter C. independent of roll diameter D. None of these Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
38. For powder of Aluminium and its alloys, the sintering temperature and time is A. 400° - 600°C, up to 20 hrs B. 370° - 500°C, up to 24 hrs C. 550° - 700°C, up to 22 hrs D. 250° - 350°C, up to 18 hrs Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
39. Pick out correct option for bulk transport phenomena of mechanism of mass transport during sintering are A. surface transport and bulk transport B. Evaporation condensation and surface diffusion C. Volume diffusion and surface diffusion D. Volume diffusion and grain boundary diffusion Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
40. Glaze coatings are applied on the green body by A. dryers B. wrapping C. spraying D. punching Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
