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- Question
Soft & non-abrasive materials can be made into fines by
Options- A. attrition
- B. compression
- C. cutting
- D. none of these
- Correct Answer
- attrition
- 1. Which of the following is not a high alumina refractory material?
Options- A. Kyanite
- B. Sillimanite
- C. Diaspore
- D. Periclase Discuss
- 2. Which of the following is not a mechanical pressure sensing element?
Options- A. Bellows
- B. Diaphragm
- C. Bourdon tube
- D. U-tube Discuss
- 3. Which is not accomplished in an underfired furnace?
Options- A. Increase in heating capacity/m2 of floor space.
- B. Elimination of cold spot at the bottom of the charge.
- C. Reduction in the temperature of furnace gases.
- D. Portection of the periphery of the charge from excessive radiation. Discuss
- 4. There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
Options- A. Mercury
- B. Arsenic
- C. Aluminium
- D. Lead Discuss
- 5. Which property is important for bricks used in the combustion chamber & dome of blast furnace stoves?
Options- A. High refractoriness.
- B. High resistance to spalling.
- C. High strength and density.
- D. All (a), (b) and (c). Discuss
- 6. What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?
Options- A. 0.1
- B. 3
- C. 13
- D. 29 Discuss
- 7. Which of the following is the most severe air pollutant?
Options- A. hydrocarbons
- B. NOx
- C. SO2
- D. CO Discuss
- 8. Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur?
Options- A. Thermosphere
- B. Troposphere
- C. Stratosphere
- D. none of these Discuss
- 9. Which is the stable form of silica upto 1470°C?
Options- A. Quartz
- B. Cristobalite
- C. Tridymite
- D. None of these Discuss
- 10. Which of the following does not figure in the list of seven substances selected for international temperature scale?
Options- A. Ice (F.P) and steam (B.P)
- B. Oxygen and sulphur (B.P)
- C. Antimony and silver (F.P)
- D. Zinc (B.P) and mercury (F.P) Discuss
More questions
Correct Answer: Periclase
Correct Answer: U-tube
Correct Answer: Increase in heating capacity/m2 of floor space.
Correct Answer: Aluminium
Correct Answer: High refractoriness.
Correct Answer: 13
Correct Answer: NOx
Correct Answer: Troposphere
Correct Answer: Tridymite
Correct Answer: Zinc (B.P) and mercury (F.P)
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