Engineering :: Energy Conversion
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| 391. |
Beaufort scale is graded from 0 to |
Answer: Option B
Explanation:
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| 392. |
Turnaround efficiency of pumped hydro schemes seldom exceeds |
Answer: Option D
Explanation:
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| 393. |
Batteries used for electrical energy storage are |
| A. |
Leclanche cells |
B. |
Edison cells |
| C. |
Lead acid cells |
D. |
Any of the above |
Answer: Option C
Explanation:
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| 394. |
Turnaround efficiency of battery energy storage system is around |
| A. |
75 percent |
B. |
50 percent |
| C. |
25 percent |
D. |
10 percent |
Answer: Option A
Explanation:
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| 395. |
Sodium sulphur batteries use electrolyte consisting of |
| A. |
solid aluminium oxide |
B. |
dilute sulphuric acid |
| C. |
brine |
D. |
KOH |
Answer: Option B
Explanation:
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| 396. |
Certain metals become super-conducting when cooled below |
| A. |
melting point |
B. |
transition temperature |
| C. |
0?K |
D. |
0?C |
Answer: Option B
Explanation:
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| 397. |
Activated carbon is used for |
| A. |
absorption of gases |
B. |
paints and varnishes as colouring agent |
| C. |
purification of water |
D. |
production of carbon steels |
Answer: Option A
Explanation:
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| 398. |
The phenomenon of physical adhesion of molecules to the surfaces of solids without chemical reaction is known as |
| A. |
dredging |
B. |
coking |
| C. |
adsorption |
D. |
liquation |
Answer: Option C
Explanation:
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| 399. |
Solid or liquid particles of microscopic size which are suspended in air or another gas from what is known as |
| A. |
aerosol |
B. |
hyperon |
| C. |
geognosy |
D. |
eluvium |
Answer: Option A
Explanation:
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| 400. |
Air curtains find applications in |
| A. |
air conditioned spaces |
B. |
green houses |
| C. |
nuclear power plants |
D. |
solar energy system |
Answer: Option A
Explanation:
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