ONLINE MCQ EE-ILLUMINATION 4

Q31. When
a fluorescent lamp is to be operated on D.C. which of the following
additional devices must be incorporated in the circuit ?
 A.  Inductance
 [Wrong Answer]
 B.  Transformer
 [Wrong Answer]
 C.  Resistance
 [Correct Answer]
 D.  Condenser
 [Wrong Answer]
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Q32. A solid angle is expressed in terms of _____
 A.  radians/meter
 [Wrong Answer]
 B.  radians
 [Wrong Answer]
 C.  steradians
 [Correct Answer]
 D.  degrees
 [Wrong Answer]
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Q33. “The
illumination is directly propor­tional to the cosine of the angle made
by the normal to the illuminated surface with the direction of the
incident flux.”

Above statement is associated with
 A.  Lambert’s cosine law
 [Correct Answer]
 B.  Planck’s law
 [Wrong Answer]
 C.  Bunsen’s law of the illumination
 [Wrong Answer]
 D.  Macbeth’s law of illumination
 [Wrong Answer]
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Q34. Filament lamp at starting will take current
 A.  less than its full running current
 [Wrong Answer]
 B.  equal to its full running current
 [Wrong Answer]
 C.  more than its full running current
 [Correct Answer]
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Q35. The function of capacitor across the supply to the fluorescent tube is primari­ly to
 A.  stabilize the arc
 [Wrong Answer]
 B.  reduce the starting current
 [Wrong Answer]
 C.  improve the supply power factor
 [Correct Answer]
 D.  reduce the noise
 [Wrong Answer]
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Q36. In electric discharge lamps light is produced by
 A.   cathode ray emission
 [Wrong Answer]
 B.  ionisation in a gas or vapour
 [Correct Answer]
 C.   heating effect of current
 [Wrong Answer]
 D.  magnetic effect of current
 [Wrong Answer]
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Q37. The gas filled in vacuum filament lamps is
 A.  nitrogen
 [Wrong Answer]
 B.  argon
 [Wrong Answer]
 C.  air
 [Wrong Answer]
 D.  none
 [Correct Answer]
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Q38. Due to which of the following reasons the light of a tube appears cooler than that of a bulb ?
 A.  Tungsten is not used in the tube
 [Correct Answer]
 B.  Tube is painted with milky colour
 [Wrong Answer]
 C.  Tube consumer less power
 [Wrong Answer]
 D.  Surface area of the tube is more than that of bulb
 [Wrong Answer]
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Q39. The tungsten filament lamps when compared with fluorescent tubes have all the following advantages except
 A.  simple installation
 [Wrong Answer]
 B.  longer life
 [Correct Answer]
 C.  less costly
 [Wrong Answer]
 D.  more brightness
 [Wrong Answer]
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Q40. Which of the following statements is correct ?
 A.  Light is a form of heat energy
 [Wrong Answer]
 B.  Light is a form of electrical energy
 [Wrong Answer]
 C.  Light consists of shooting particles
 [Wrong Answer]
 D.  Light consists of electromagnetic waves
 [Correct Answer]
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ONLINE MCQ EE-ILLUMINATION 5
ONLINE MCQ-भारतीय संविधान 8

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