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- Question
Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effect in evaporation
Options- A. increases capacity.
- B. increases economy.
- C. does not affect the capacity.
- D. both 'b' & 'c'.
- Correct Answer
- both 'b' & 'c'.
- 1. Use of 'grinding aids' is done in __________ grinding.
Options- A. dry
- B. wet
- C. ultrafine
- D. intermediate Discuss
- 2. Grinding efficiency of a ball mill is of the order of __________ percent.
Options- A. 1-5
- B. 40-50
- C. 75-80
- D. 90-95 Discuss
- 3. Poly tetra flouro ethylene (PTFE) is known as
Options- A. dacron
- B. teflon
- C. bakelite
- D. celluloid Discuss
- 4. German silver used for decorative purposes contains maximum percentage of
Options- A. silver
- B. copper
- C. zinc
- D. nickel Discuss
- 5. Ammonium phosphate is a __________ fertiliser.
Options- A. nitrogenous
- B. phosphatic
- C. complex
- D. mixed Discuss
- 6. Radioactivity of an isotope is expressed in
Options- A. barn
- B. MeV
- C. Curie
- D. Ergs Discuss
- 7. Corrosion of metals can not be prevented by its
Options- A. tempering
- B. chromising
- C. aluminising
- D. alloying Discuss
- 8. The value of 'angle of nip' is generally about
Options- A. 16°
- B. 32°
- C. 52°
- D. 64° Discuss
- 9. Which is a neutral refractory?
Options- A. Graphite
- B. Magnesite chrome
- C. Silica
- D. Magnesia Discuss
- 10. Buna-S is also known as
Options- A. teflon
- B. PTFE
- C. SBR
- D. polycrylates Discuss
More questions
Correct Answer: dry
Correct Answer: 1-5
Correct Answer: teflon
Correct Answer: copper
Correct Answer: mixed
Correct Answer: Curie
Correct Answer: tempering
Correct Answer: 32°
Correct Answer: Graphite
Correct Answer: SBR
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