Electric Illumination are true (T) or false (F)

TRUE AND FALSE

1. Carbon arc lamps needs frequent adjustment and replacement of carbon rod.--T

2. Lumen method takes into account the inter-reflections of light inside a room.--T

3. Luminairs are generally categorized as industrial, commercial or residential.--T

4. Lenses with prismatic patterns refract light sources to disperse the rays or to direct them most effectively.--T

5. High pressure sodium vapor Lamps use metallic sodium sealed in translucent aluminum oxide tubes.--T  

6. Standard candle is also known as meter candle.--T  

7. Incandescent-lamp filaments are generally constructed of copper.--F

8. Candelabra refers to the base of an incandescent lamp.--T

9.The luminous efficacy is expressed in lumen output per radiated watt. --T

10. Lumen is the unit of luminous flux.--T