GATE 2017-2018 :: GATE Chemical
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Match the reactant-product combination in Group 1 with the unit process in Group 2.Group 1 Group 2(P) propylene - butanol (1) Pyrolysis(Q) cumene - phenol (2) Dehydrogenation(R) butane - butadiene (3) Hydroformylation(S) ethylene dichloride - vinyl chloride (4) Peroxidation
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Identify which of the following statements are FALSE. (P) Oils with an oleic radical (1 double bond) are more suitable than oils with a linolenic radical (3 double bonds) as film forming vehicles for paints(Q) Production of synthesis gas from coal and steam is an endothermic process(R) Use of chlorine for bleaching of wood pulp results in the release of dioxins(S) In the manufacture of urea from ammonia, the main intermediate product formed is ammonium bicarbonate
- A unit gain 2nd order underdamped process has a period of oscillation 1 second and decay ratio 0.25. The transfer function of the process is
- A control valve, with a turndown ratio of 50, follows equal percentage characteristics. The flow rate of a liquid through the valve at 40% stem position is 1 m3/h. What will be the flow rate in m3/h at 50% stem position, if the pressure drop across the valve remains unchanged? (Up to 2 digits after the decimal point.) ________
- The purchase cost of a heat exchanger of 20 m2 area was Rs. 500000 in 2006. What will be the estimated cost (in Rs. to the nearest integer) of a similar heat exchanger of 50 m2 area in the year 2013? Assume the six-tenths factor rule for scaling and the cost index for 2006 as 430.2. The projected cost index for the year 2013 is 512.6. _________
- A plant manufactures compressors at the rate of N units/day. The daily fixed charges are Rs. 20000 and the variable cost per compressor is Rs. 500 + 0.2 N1.3. The selling price per compressor is Rs. 1000. The number of compressors to be manufactured, to the nearest integer, in order to maximize the daily profit is ___________
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A reverse osmosis unit treats feed water (F) containing fluoride and its output consists of a permeate stream (P) and a reject stream (R). Let CF, CP and CR denote the fluoride concentrations in the feed, permeate, and reject streams, respectively. Under steady state conditions, the volumetric flow rate of the reject is 60 % of the volumetric flow rate of the inlet stream, and CF = 2 mg/L and CP = 0.1 mg/L. The value of CR in mg/L, up to one digit after the decimal point, is _________
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A reverse osmosis unit treats feed water (F) containing fluoride and its output consists of a permeate stream (P) and a reject stream (R). Let CF, CP and CR denote the fluoride concentrations in the feed, permeate, and reject streams, respectively. Under steady state conditions, the volumetric flow rate of the reject is 60 % of the volumetric flow rate of the inlet stream, and CF = 2 mg/L and CP = 0.1 mg/L. A fraction f of the feed is bypassed and mixed with the permeate to obtain treated water having a fluoride concentration of 1 mg/L. Here also the flow rate of the reject stream is 60% of the flow rate entering the reverse osmosis unit (after the bypass). The value of f , up to 2 digits after the decimal point, is __________
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Liquid reactant A decomposes as follows A --> R rR = k1C2A k1 = 0.5 m3/mol-sA --> S rS = k2CA k2 = 1 s-1An aqueous feed of composition CA0 = 30 mol/m3, CR0 = 2 mol/m3 and CS0 = 1 mol/m3 enters a CSTR in which the above reactions occur. Assume isothermal and steady state conditions.If the conversion of A is 80 %, the concentration of R in the exit stream in mol/m3, to the nearest integer, is _________
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Liquid reactant A decomposes as follows A --> R rR = k1C2A k1 = 0.5 m3/mol-sA --> S rS = k2CA k2 = 1 s-1An aqueous feed of composition CA0 = 30 mol/m3, CR0 = 2 mol/m3 and CS0 = 1 mol/m3 enters a CSTR in which the above reactions occur. Assume isothermal and steady state conditions.What is the % conversion of A, to the nearest integer, so that the concentration of S in the exit stream is 11.8 mol/m3? _________
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