FUEE_ELECTRIC LIGHTING

Candela is the unit of which?

• Wavelength

• Luminous Intensity

• Luminous Flux

• Frequency

Solid angle is expressed in terms of

• Radians/meter

• Radians

• Steradians

• Degree

Which lamp has the best Colour Rendering Index (CRI)?

• LED

• Fluorescent

• Incandescent

• High Pressure Sodium Vapour

Which lamps can be directly connected to a solar cell?

• Incandescent

• LED

• Sodium vapor lamp

• Compact Flurescent

Candela/metre square is the unit of which quantity?

• Illuminance

• Luminous Flux

• Luminance

• Luminous Intensity

Which lamp is best suited for lighting an International sports arena?

• 
  Incandescent

• Sodium vapor lamp

• Compact Fluorescent

• LED

What is the work of a driver in case of an LED?

• To convert AC to DC

• To convert DC to AC

• Both A and B

• None of these

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?

• 2

• 4

• 5

• 6

The range of visual spectrum is

• 300nm - 1000nm

• 480nm - 1000nm

• 480nm - 760nm

• 300nm - 760nm

What will be the total flux emitted by a source of 60 candle power?

• 754.2 lumens

• 0.001326 lumens

• 60 lumens

• None of these