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- Question
Overall efficiency of the distillation column is
Options- A. the ratio of number of ideal plates to actual plates.
- B. the ratio of number of actual plates to ideal plates.
- C. same as the Murphree efficiency.
- D. always more than the point efficiency.
- Correct Answer
- the ratio of number of ideal plates to actual plates.
- 1. Addition of grog in fireclay brick during its manufacture is advantageous, because it results in
Options- A. less shrinkage in heating, decreased apparent porosity & increased specific gravity.
- B. high strength & thermal spalling resistance.
- C. less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production.
- D. all (a), (b) and (c). Discuss
- 2. The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.
Options- A. lower than
- B. higher than
- C. same as
- D. not related to Discuss
- 3. Which of the following is a desirable characteristic of an instrument?
Options- A. High drift
- B. High fidelity
- C. High measuring lag
- D. Poor reproducibility Discuss
- 4. A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is
Options- A. 10
- B. 10
- C. 20
- D. 20 Discuss
- 5. For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
Options- A. 10000
- B. 5
- C. 500
- D. 1000 Discuss
- 6. Test piece for determination of RUL of a refractory is heated in a/an
Options- A. oxidising atmosphere
- B. reducing atmosphere
- C. electric furnace
- D. neutral atmosphere Discuss
- 7. __________ polymer is used for making unbreakable crockery.
Options- A. Thermoplastic
- B. Melamine
- C. Addition
- D. none of these Discuss
- 8. __________ is a copolymer.
Options- A. Nylon-66
- B. Polyrophylene
- C. PVC
- D. Poly tetra flouro ethylene Discuss
- 9. Petroleum deposits are detected by the.
Options- A. oil seepage at the surface of the earth.
- B. measuremet of density, elasticity and magnetic & electric properties of the rock in the crust of the earth.
- C. age & nature of rocks inside the crust of the earth.
- D. all (a), (b) and (c) Discuss
- 10. Hole diameter of the seive trays in the distillation column ranges from __________ mm.
Options- A. lto3
- B. 4 to 8
- C. 3 to 12.5
- D. 12.5 to 18.5 Discuss
More questions
Correct Answer: all (a), (b) and (c).
Correct Answer: lower than
Correct Answer: High fidelity
Correct Answer: 10
Correct Answer: 5
Correct Answer: electric furnace
Correct Answer: Melamine
Correct Answer: Nylon-66
Correct Answer: all (a), (b) and (c)
Correct Answer: 3 to 12.5
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