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Electric Illumination - electric traction- Section-2
  1. Which photometer depends for its operation on Lambert's cosine law ?
    2. A.
    Macbeth lllumino meter
    B.
    Trotter Illumination Photometer
    C.
    Lummer Brodhum Photometer
    D.
    Guild's Flicker Photometer

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  2. Which photometer is used for comparing the lights of different colors ?
    3. A.
    Bunson photometer
    B.
    Grease spot photometer
    C.
    Lummer Brodhum photometer
    D.
    Guilds Flicker Photometer

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  3. Optical instruments used for the comparison of candle powers of different sources arc known as
    4. A.
    Candle meters
    B.
    Radio meters
    C.
    Bunsen meter
    D.
    Photo meter

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  4. For the same wastage which lamp is cheapest ?
    5. A.
    Sodium vapor lamp
    B.
    Mercury vapor lamp
    C.
    Fluorescent tube
    D.
    GLS lamps

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  5. Standard wattage of 3 ft. fluorescent tube is
    6. A.
    10 W
    B.
    40 W
    C.
    65 W
    D.
    100 W

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