Electric Energy Generation Utilization and Conservation solved MCQs
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The illumination at various points on a horizontal surface illuminated by the same source varies asThe illumination at various points on a horizontal surface illuminated by the same source varies as
The answer is:
A. cos3θ
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Floodlighting is NOT used for purposesFloodlighting is NOT used for purposes.
The answer is:
A. reading
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Which of the following lamp has minimum initial cost of installation but maximum running cost ?Which of the following lamp has minimum initial cost of installation but maximum running cost ?
The answer is:
A. incandescent
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Candela is the unit of which of the following?Candela is the unit of which of the following?
The answer is:
B. luminous intensity
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Colour of light depends uponColour of light depends upon
The answer is:
C. both (a) and (b)
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Illumination of one lumen per sq. metre is calledIllumination of one lumen per sq. metre is called
The answer is:
B. lux
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A solid angle is expressed in terms ofA solid angle is expressed in terms of
The answer is:
C. steradians
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The unit of luminous flux is |
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Filament lamps operate normally at a power factor ofFilament lamps operate normally at a power factor of
The answer is:
C. unity
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The filament of a GLS lamp is made ofThe filament of a GLS lamp is made of
The answer is:
A. tungsten
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Which of the following lamps is the cheapest for the same wattage?Which of the following lamps is the cheapest for the same wattage?
The answer is:
C. gls lamp
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On which of the following factors dies the depreciation or maintenance factor depend?On which of the following factors dies the depreciation or maintenance factor depend?
The answer is:
D. all of the above factors
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For the same lumen output, the running cost of the fluorescent lamp isFor the same lumen output, the running cost of the fluorescent lamp is
The answer is:
B. less than that of filament lamp
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The flicker effect of fluorescent lamps is more pronounced atThe flicker effect of fluorescent lamps is more pronounced at
The answer is:
A. lower frequencies
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is a cold cathode lamp...... is a cold cathode lamp.
The answer is:
B. neon lamp
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For normal reading the illumination level required is aroundFor normal reading the illumination level required is around
The answer is:
B. 60-100 lumens/m2
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Which gas can be filled in GLS lamps?Which gas can be filled in GLS lamps?
The answer is:
D. xenon
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Which of the following is not the type of refrigerant?Which of the following is not the type of refrigerant?
The answer is:
D. halo-helium refrigerants
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The refrigerants which are first cooled by refrigerants and then used for cooling purposes are known as refrigerantsThe refrigerants which are first cooled by refrigerants and then used for cooling purposes are known as refrigerants.
The answer is:
B. primary, secondary
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Which one of the following inorganic refrigerants is often used?Which one of the following inorganic refrigerants is often used?
The answer is:
A. nh3
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total MCQs: 87
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