Explain how can I evaluate the thermal relief requirements for double block-in of 98% sulfuric acid?

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Mention some of the specialized grinding methods?

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Explain the Deacon reaction?

2 Answers  

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POLYMER ENGINEERING - QUESTION 24.2 : Let C% be the fractional crystallinity, Rs = density of sample, Ra = density of amorphous form and Rc = density of crystalline form. In a polymer, these unknowns could be related by the equation C% = (Rc / Rs) (Rs - Ra) / (Rc - Ra). (a) Find the equation of Rc as a function of C%, Rs and Ra. (b) Two samples of a polymer, C and D exist. For sample C, C% = 0.513 when Rs = 2.215 unit. For sample D, C% = 0.742 when Rs = 2.144 unit. Both samples C and D have the same values of Ra and Rc. Find the values of Ra and Rc in 6 decimal places.

1 Answers  

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What are the different characteristics that can affect the flow of bulk solids and how?

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How fouling effected the heat transfer rate?

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Question - Chemical Engineering Material - In crystal material, hexagonal crystal system could form 4-digit index in certain direction of solid. For [1(-1)0] direction in the hexagonal crystal systems of particular catalyst applied in fume removal of incinerator, what is the four-digit index for this direction? Hint : The transformation equations between the 3-digit [h’k’l’] and the 4-digit [hkil] indices are : h = (1/3) (2h’ – k’); i = - (h + k); k = (1/3) (2k’ – h’); l = l’. A. [(-1)100] B. [1(-1)00] C. [(-1)000] D. [00(-1)(-1)] E. [(-1)0(-1)0]

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Why is post-weld heat treatment sometimes necessary for welded vessels?

0 Answers   Aramco,

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what is the main components of air

3 Answers   ONGC,

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Why should a magnesium ribbon be cleaned before burning in air?

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Are some heat transfer services more prone to tube vibration that others for a shell and tube exchanger?

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Name some common problems associated with dense phase pneumatic conveying?

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