Engineering :: Energy Conversion
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| 191. |
Which of the following gives nearly monochromatic light? |
| A. |
Sodium vapour lamp |
B. |
GLS lamp |
| C. |
Fluurescent tube |
D. |
Mercury vapour lamp |
| E. |
None of the above |
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Answer: Option A
Explanation:
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| 192. |
The illumination level in the houses is usually in the range |
| A. |
10 to 20 lumens/m2 |
B. |
100 to 1400 lumens/m2 |
| C. |
400 to 650 lumens/m2 |
D. |
1200 to 1600 lumens/m2 |
| E. |
2500 to 3000 lumens/m2 |
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Answer: Option B
Explanation:
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| 193. |
Which of the following is not the standard rating of GLS lamps in India? |
Answer: Option C
Explanation:
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| 194. |
Visible spectrum of light has wavelength in the range |
| A. |
10 to 40 A |
B. |
100 to 400 A |
| C. |
4000 to 7000 A |
D. |
14,000 to 17,000 A |
| E. |
40,000 to 70,000 A |
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Answer: Option C
Explanation:
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| 195. |
Which of the following gas is sometimes filled in filament lamps? |
Answer: Option A
Explanation:
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| 196. |
The expected life of a GLS lamp is nearly |
| A. |
50 hours |
B. |
100 hours |
| C. |
1000 hours |
D. |
5000 hours |
| E. |
10,000 hours |
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Answer: Option C
Explanation:
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| 197. |
Which lamp is used for cinerma projectors |
| A. |
Frosted GLS lamp |
B. |
Nitrogen filled GLS lamp |
| C. |
Mercury vapour lamp |
D. |
Carbon arc lamp |
| E. |
Sodium vapour lamp |
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Answer: Option D
Explanation:
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| 198. |
Power factor is expected to be highest in case of |
| A. |
Mercury vapour lamp |
B. |
Carbon arc lamp |
| C. |
Tube lights |
D. |
Sodium lamps |
| E. |
GLS lamp |
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Answer: Option E
Explanation:
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| 199. |
The flicker effect of fluorescent lamps is more pronounced at |
| A. |
Lower frequencies |
B. |
Higher frequencies |
| C. |
Lower voltage |
D. |
Higher voltages |
| E. |
None of the above |
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Answer: Option E
Explanation:
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| 200. |
The wavelength of green colour is nearly |
Answer: Option D
Explanation:
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