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: Option C
Which of the following components can be manufactured by powder metallurgy technique?
A. Cams
B. engine disks
C. connecting rod
D. All of these
A. III is true, but I, II and IV are not true
B. I and IV are true, but II and III are not true
C. I, II, III and IV are not true
D. I, II and III are true, but IV is not true
During hot isostatic pressing of powder particulates, the pressure and temperatures are
A. in the range of 4 to 30MPa and 500 to 2200°C respectively
B. in the range of 40 to 300MPa and 500 to 2200°C respectively
C. in the range of 30 to 300MPa and 500 to 2200°C respectively
D. in the range of 40 to 300MPa and 50 to 220°C respectively
Density in sintering product is improved by
A. Hot pressing
B. Cold pressing
C. Coining
D. Both B and C
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