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- Question
Which of the following holds good for a solution obeying Raoult's law (i.e., an ideal solution) (where, ?H = heat of mixing, and ?V = volume change on mixing )?
Options- A. ?H = 1 (+ ve)and ? V = -ve
- B. ?H = 0
- C. ?V = 0
- D. both (b) and (c)
- Correct Answer
- both (b) and (c)
- 1. Gizzlies are used for separating __________ solids.
Options- A. coarse
- B. fine
- C. any size
- D. none of these Discuss
- 2. Cyclones are used primarily for separating
Options- A. solids
- B. solids from fluids
- C. liquids
- D. solids from solids Discuss
- 3. In case of a revolving mill, wet grinding compared to dry grinding
Options- A. requires more energy.
- B. has less capacity.
- C. complicates handling & classification of the product.
- D. none of these. Discuss
- 4. There is practically no alternative/competitor to __________ in the beneficiation treatment of sulphide ores.
Options- A. classification
- B. tabling
- C. jigging
- D. froth floatation Discuss
- 5. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of
Options- A. siloxane elastomers.
- B. polyamides.
- C. vinyl polymers.
- D. urea-formaldehyde resins. Discuss
- 6. One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m3. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m3. The latent heat of condensation (kJ/kg-1 ) under these conditions is
Options- A. 40732
- B. 2676
- C. 2263
- D. 540 Discuss
- 7. At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be
Options- A. 6
- B. 8
- C. 10
- D. 12 Discuss
- 8. For turbulent flow (NRe > 2100) of low viscosity fluid (? > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec.? = fluid density, lb/ft3 ? = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)
Options- A. Di, opt = 3.9 Q0.45 ?0.13
- B. Di, opt = 3.9 Q0.45 . ?0.95
- C. Di, opt = 4.7 Q0.36 . ?3.2?0.13
- D. Di, opt = 3 Q0.36 . ?0.88 Discuss
- 9. Gantt chart (or Bar chart) is helpful in
Options- A. efficient utilisation of manpower and machines.
- B. preparing production schedule.
- C. efficient despatching of products.
- D. inventory control. Discuss
- 10. Tar dolomite bricks are used in the
Options- A. basic Bessemer converter
- B. basic open hearth furnace
- C. electric furnaces
- D. all (a), (b) and (c) Discuss
More questions
Correct Answer: fine
Correct Answer: solids from fluids
Correct Answer: none of these.
Correct Answer: froth floatation
Correct Answer: urea-formaldehyde resins.
Correct Answer: 2263
Correct Answer: 8
Correct Answer: Di, opt = 3.9 Q0.45 ?0.13
Correct Answer: preparing production schedule.
Correct Answer: all (a), (b) and (c)
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