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- Question
The basic filtration equation is given as
where, V is volume of the filtrate ; A is the filtration area, a is specific cake resistance, ? is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry.
In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm ; assume incompressible cake.
Options- A. 10
- B. 20
- C. 25
- D. 30
- Correct Answer
- 20
- 1. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
Options- A. polythene
- B. PVC
- C. rayon
- D. polyvinyl acetate Discuss
- 2. Pick out the endothermic reaction out of the following.
Options- A. C+½O2 = CO
- B. CO + 3H2 = CH4 + H2O
- C. CaCO3 = CaO + CO2
- D. CO +½O2 = CO2 Discuss
- 3. The operation of a rotameter is based on
Options- A. variable flow area.
- B. rotation of a turbine.
- C. pressure drop across a nozzle.
- D. pressure at a stagnation point. Discuss
- 4. Reaction of cresylic acid with __________ produces tricresyl phosphate.
Options- A. phosphorous pentoxide
- B. phosphorous oxychloride
- C. ammonium phosphate
- D. calcium phosphate Discuss
- 5. Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?
Options- A. Iso propyl alcohol
- B. Butyl alcohol
- C. Toluene
- D. Hexane Discuss
- 6. LPG when brought to atmospheric pressure & temperature will be a
Options- A. liquid lighter than water.
- B. liquid heavier than water.
- C. gas lighter than air.
- D. gas heavier than air. Discuss
- 7. Chemical formula of biuret is
Options- A. NH2.CO.NH2
- B. NH3.COO.NH3
- C. NH2CONHCONH2
- D. NH4COONH2 Discuss
- 8. Use of baffles in agitators help in minimising the __________ tendency.
Options- A. swirling
- B. vortexing
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 9. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is
Options- A. less than 100°C
- B. 100°C
- C. between 100 and 110°C
- D. 110.6°C Discuss
- 10. Radiation pyrometers as compared to thermocouples
Options- A. has a slower speed of response.
- B. can measure higher temperature.
- C. can't measure the temperature of moving objects.
- D. is more affected by corrosive atmosphere. Discuss
More questions
Correct Answer: PVC
Correct Answer: CaCO3 = CaO + CO2
Correct Answer: variable flow area.
Correct Answer: phosphorous oxychloride
Correct Answer: Butyl alcohol
Correct Answer: gas heavier than air.
Correct Answer: NH2CONHCONH2
Correct Answer: both (a) & (b)
Correct Answer: between 100 and 110°C
Correct Answer: can measure higher temperature.
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