Discussion
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- Question
In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.
Options- A. concentrate
- B. tailing
- C. middling
- D. none of these.
- Correct Answer
- middling
- 1. Mixing mechanism employed in a pan mixer is by
Options- A. mulling
- B. kneading
- C. dispersion
- D. none of these Discuss
- 2. Pyrometric cone equivalent (PCE) value (Segar cone) of 'superduty refractories' is more than 33 which corresponds to a temperature of __________ °C.
Options- A. 1520
- B. 1630
- C. 1670
- D. 1730 Discuss
- 3. Fireclay refractories have
Options- A. low co-efficient of thermal expansion.
- B. poor thermal spalling resistance.
- C. tendency to expand unduly high during firing.
- D. very high cost. Discuss
- 4. BOD of raw municipal sewage may be in the range of about __________ mg/litre.
Options- A. 1-2
- B. 5-10
- C. 150-300
- D. 2000-3000 Discuss
- 5. Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ?= density of particles)
Options- A. m/? . Vp
- B. m . ?/Vp
- C. m . Vp/?
- D. Vp/m . ? Discuss
- 6. __________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
Options- A. Calcium
- B. Fluorine
- C. Phosphorous
- D. Sulphur Discuss
- 7. The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.
Options- A. pressure
- B. volume
- C. viscosity
- D. all (a), (b) and (c) Discuss
- 8. Fusion temperature of pure silica (SiO2) is __________ °C.
Options- A. 1350
- B. 1715
- C. 2570
- D. 2800 Discuss
- 9. Rock phosphate used for the production of phosphatic fertiliser is mined at
Options- A. Amjhor (Jharkhand)
- B. Talchar (Orissa)
- C. Bailladella (M.P.)
- D. Kiriburu (Bihar) Discuss
- 10. In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
Options- A. outlet flow rate
- B. level
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
More questions
Correct Answer: mulling
Correct Answer: 1730
Correct Answer: low co-efficient of thermal expansion.
Correct Answer: 150-300
Correct Answer: m/? . Vp
Correct Answer: Fluorine
Correct Answer: all (a), (b) and (c)
Correct Answer: 1715
Correct Answer: Amjhor (Jharkhand)
Correct Answer: outlet flow rate
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