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- Question
For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately __________ microns.
Options- A. 5
- B. 50
- C. 500
- D. 5000
- Correct Answer
- 500
- 1. Corrosion of metals can not be prevented by its
Options- A. tempering
- B. chromising
- C. aluminising
- D. alloying Discuss
- 2. The value of 'angle of nip' is generally about
Options- A. 16°
- B. 32°
- C. 52°
- D. 64° Discuss
- 3. Which is a neutral refractory?
Options- A. Graphite
- B. Magnesite chrome
- C. Silica
- D. Magnesia Discuss
- 4. Buna-S is also known as
Options- A. teflon
- B. PTFE
- C. SBR
- D. polycrylates Discuss
- 5. Viscosity of atmospheric air may be about __________ centipoise.
Options- A. 0.015
- B. 1.5
- C. 15
- D. 150 Discuss
- 6. Refined acetic acid storage vessel are made of
Options- A. copper
- B. aluminium
- C. high carbon steel
- D. nickel Discuss
- 7. Which is a basic refractory?
Options- A. Fireclay
- B. Silica
- C. Chrome magnesite
- D. None of these Discuss
- 8. Soaking pits are meant for heating steel
Options- A. ingots
- B. coils
- C. sheets
- D. slabs Discuss
- 9. Percentage of heavy water in ordinary water is around
Options- A. 0.015
- B. 7.54
- C. 0.71
- D. 32.97 Discuss
- 10. Density of low density polythene is about __________ gm/c.c.
Options- A. 0.38
- B. 0.56
- C. 0.81
- D. 0.91 Discuss
More questions
Correct Answer: tempering
Correct Answer: 32°
Correct Answer: Graphite
Correct Answer: SBR
Correct Answer: 0.015
Correct Answer: aluminium
Correct Answer: Chrome magnesite
Correct Answer: ingots
Correct Answer: 0.015
Correct Answer: 0.91
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