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- Question
A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is
Options- A. 0.1
- B. 0.4
- C. 0.6
- D. none of these
- Correct Answer
- 0.6
- 1. Sedimentation on commercial scale occurs in
Options- A. classifiers
- B. thickeners
- C. rotary drum filters
- D. cyclones Discuss
- 2. The optimum size of the ammonia plant is __________ tons/day.
Options- A. 10
- B. 100
- C. 1000
- D. 1000C. Discuss
- 3. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
Options- A. 20
- B. 200
- C. 500
- D. 1000 Discuss
- 4. The temperature at which a real gas obeys Boyle's law is termed as the
Options- A. triple point
- B. Boyle's temperature
- C. eutectic point
- D. inversion temperature Discuss
- 5.
for couplings and unions would be
Options- A. 60
- B. 200
- C. 350
- D. negligible Discuss
- 6. Grindability of a material does not depend upon its
Options- A. elasticity
- B. hardness
- C. toughness
- D. size Discuss
- 7. Which of the following is not a weightless pollutant?
Options- A. SPM
- B. Thermal pollution
- C. Radioactive rays
- D. Noise pollution Discuss
- 8. Size measurement of ultrafine particles can be best expressed in terms of
Options- A. centimetre
- B. screen size
- C. micron
- D. surface area per unit mass Discuss
- 9. Conditioners like finely divided peat are added to the fertiliser to
Options- A. counteract burning.
- B. avoid caking & hardening.
- C. produce bulk.
- D. increase its solubility. Discuss
- 10. Leidenfrost point is a term concerned with the
Options- A. condensation of the saturated vapor on a cold surface.
- B. concentration of a corrosive solution by evaporation.
- C. heat transfer between two highly viscous liquids.
- D. boiling of a liquid on a hot surface. Discuss
More questions
Correct Answer: rotary drum filters
Correct Answer: 1000
Correct Answer: 200
Correct Answer: Boyle's temperature
Correct Answer: negligible
Correct Answer: size
Correct Answer: SPM
Correct Answer: surface area per unit mass
Correct Answer: avoid caking & hardening.
Correct Answer: boiling of a liquid on a hot surface.
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