MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your IES knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Luminous efficiency of a fluorescence lamp is |
| A. | 70 lumens / watt. |
| B. | 60 lumens / watt |
| C. | 40 lumens / watt |
| D. | 30 lumens / watt |
| Answer» D. 30 lumens / watt | |
| 2. |
Total flux or lumens required in any lighting scheme depends inversely on |
| A. | utilization factor. |
| B. | utilization factor. |
| C. | reflection factor |
| D. | none of the above |
| Answer» B. utilization factor. | |
| 3. |
What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room? |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 4. |
Which lamps can be directly connected to a solar cell? |
| A. | Incandescent |
| B. | Metal Halide |
| C. | Compact Fluorescent |
| D. | LED |
| Answer» E. | |
| 5. |
Which lamp has the best Colour Rendering Index (CRI)? |
| A. | LED |
| B. | Fluorescent |
| C. | Incandescent |
| D. | High pressure sodium vapour |
| Answer» D. High pressure sodium vapour | |
| 6. |
Solid angle is expressed in terms of |
| A. | radians / meter. |
| B. | radians. |
| C. | steredians |
| D. | degree. |
| Answer» D. degree. | |
| 7. |
Candela is the unit of which? |
| A. | Wavelength. |
| B. | Luminous intensity. |
| C. | Luminous flux. |
| D. | Frequency. |
| Answer» C. Luminous flux. | |