Chemical Engineering Mcqs

Submitted By: Ali Uppal

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  • In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be________________?
  • What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively ?
  • The critical pressure at which the latent heat of vaporization of steam becomes zero is _____________ Kg/cm2 ?
  • The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
  • Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand?

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