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- Question
Pick out the wrong statement.
Options- A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'.
- B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials.
- C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces.
- D. Tungsten steel and alnico are not hard magnetic materials.
- Correct Answer
- Tungsten steel and alnico are not hard magnetic materials.
- 1. Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.
Options- A. X-rays
- B. ?-rays
- C. ?-rays
- D. ?-rays Discuss
- 2. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity
Options- A. is trebled.
- B. remains unchanged.
- C. decreases by a factor of 3.
- D. decreases by a factor of 1/3. Discuss
- 3. A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is
Options- A. lead
- B. glass
- C. mica
- D. silver Discuss
- 4. Powder metallurgy process does not make metal powder by
Options- A. atomisation
- B. grinding/milling
- C. hammering
- D. electrolytic deposition Discuss
- 5. Speisses is a mixture of the following:
Options- A. Arsenides of heavy metals.
- B. Antimonides of heavy metals.
- C. Arsenides & antimonides of heavy metals.
- D. Iron, cobalt and nickel. Discuss
- 6. Maximum permissible air velocity in pipelines is about __________ metre/second.
Options- A. 5
- B. 10
- C. 20
- D. 40 Discuss
- 7. A solar cell converts the sunlight directly into __________ energy.
Options- A. thermal
- B. electrical
- C. mechanical
- D. chemical Discuss
- 8. Tin based white metals are used, where bearings are subjected to
Options- A. high pressure & load.
- B. low pressure & load.
- C. high temperature.
- D. large surface wear. Discuss
- 9. The following type of bonding is strongly directional in solids.
Options- A. Vander Waal's
- B. Ionic
- C. Metallic
- D. Covalant Discuss
- 10. Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?
Options- A. Emissivity of pipe surface.
- B. Diameter & length of the pipe.
- C. Temperature of hot pipe surface & that of air in the room.
- D. none of these. Discuss
Chemical Engineering Basics problems
Search Results
Correct Answer: ?-rays
Correct Answer: remains unchanged.
Correct Answer: lead
Correct Answer: hammering
Correct Answer: Arsenides of heavy metals.
Correct Answer: 10
Correct Answer: electrical
Correct Answer: high pressure & load.
Correct Answer: Covalant
Correct Answer: none of these.
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