Day 1 bank of reviewer questions for Chemical Engineering Board ExamFull description
Day 1 bank of reviewer questions for Chemical Engineering Board Exam
1. In an exothermic reaction, heat is produced. ________2. In an endothermic reaction, heat is absorbed. ________3. Elements combine or displace each other according to its equivalent we…Full description
Chemical Engineering Board Exam Sample Questions May 2016Full description
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for gate nd pgecet it was most useful objective queFull description
for gate nd pgecet it was most useful objective queFull description
Contain mcqs of software engineeringFull description
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Chemical Engineering LawsFull description
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Chemical engineeringDescripción completa
S. K. Ghoshal, S. K. Sanyal and S. Datta
Notes
Soal-soal bio
List of Topics included per day
Day 2 – Chemical Engineering 1.
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A flotation plant processes 3,000 tons/day of CuFeS2.It produces 80 tons Cu concentrate assaying 25% Cu. If ore analyzes 0.7% Cu, The precent recovery is a. 95.24% b. 99.24% c. 93.24% d. 92.24% Any operation in which one solid is separated from another by floating one of them on the surface of the fluid. a. Flocculation b. Agglomeration c. Flotation d. Sedimentation Alter the surface of the mineral in order that it will become air-avid a. Frothers b. Promoters c. Coagulant d. Activators added to strengthen temporarily covering film of the air bubbles. It serves to stabilize the froth and holds the minerals until the froth can be scraped off into the concentrate launder. a. Frothers b. Promoters c. Coagulant d. Activators A Swenson-Walker crystallizer is to be used to produce 1 ton/hr of copperas crystalas by cooling a saturated solution which enters the crystallizer at 120oF. The slurry leaving the crystallizer will be at 80oF. Cooling water enters the crsyallizer jacket at 60oF and leaves at 70oF. It may be assumed that U for the crystallization is 35 BTU/h-ft2-oF. There are 3.5 ft2 of cooling surface per foot of crystallizer length and crystallization unit is 10 ft length. The cooling water required is a. 52 gpm b. 56gpm c. 60gpm d. 64 gpm The number of crystallizer units to be used. a. 6 b. 7 c. 8 d. 9 The concentration difference between that of the supersaturated solution in which the crystal is growing and that of a solution in equilibrium with the crystal is called a. Saturation b. Unsaturation c. Supersaturation d. None of these Compounds whose solubility increase with increasing temperature results in a. Absorption of heat when the compound dissolves b. No evolution of heat c. Evolution of heat when solution occurs d. All of these Which of the following is a hydrophobic adsorbent? a. Zeolites
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b. Silica gel c. Chabazite d. Activated carbon Rate of physical adsorption increases with a. Increase in temperature b. Decrease in pressure c. Decrease in temperature d. Decrease in surface area Which of the following is not correct for physical adsorption? a. Adsorption on solid is reversible b. Adsorption is spontaneous c. Adsorption increases in temperature d. Both enthalpy and entropy of adsorption are negative The substance which is adsorbed on the surface a. Absorbent b. Absorbate c. Adsorbent d. Adsorbate The small multiblade ones in the radial-flow impellers are called a. Propeller b. Paddles c. Turbines d. Stirrer The adsorbent used in the purification of hydrocarbon products a. Alumina b. Bone char c. Fuller’s earth d. Silica gel The term applied to all ways in which particles of solids are cut or broken into smaller pieces a. Size reduction b. Screening c. Comminution d. Crushing The hardness of a mineral is criterion of its resistance to crushing. Which of the following is an example of a hard material a. Talc b. Calcite c. Sapphire d. Feldspar States that the energy required for crushing is proportional to the new surface created a. Rittinger’s law b. Kick’s law c. Bond law d. Energy law When strong vertical currents in the mixing tank is desired, it is best to use a. Anchor agitator b. Propellers c. Pitched blade turbine d. Vertical blade turbine The velocity components induced by the rotation of the impeller in a mixing process tends to induce the formation of vortex and swirling. These velocity components are a. Vertical b. Normal to rotation c. Tangential and radial d. Longitudinal The drag coefficient in hindered settling is ___ compared to free settling a. Greater than
