Lighting, Noise and Radiation

• Q1.WHO recommendation cut off for noise in industrial city:

  • A70 dB
  • B60 dB
  • C45 dB
  • D120 dB
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• Q2.SI unit of the brightness of a point light source is

  • ACandela
  • BLumen
  • CLux
  • DLambert
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• Q3.Wavelength of UVB is :

  • A250-280 nm
  • B280-320 nm
  • C320-400 nm
  • D400-700 nm
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• Q4.Best range of UV light used for treatment of skin diseases:

  • A100 to 200 nm
  • B200 to 400 nm
  • C400 to 700 nm
  • DMore than 700
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• Q5.Medically most impoant form of UV radiation is -

  • AUV-A
  • BUV-B
  • CUV-C
  • DNone of the above
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• Q6.Curie is the unit for -

  • ARadiation emitted
  • BRadiation absorbed
  • CRadioactivity
  • DAll of the above
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• Q7.Day light factor in living room should be ?

  • A8%
  • B6%
  • C10%
  • D15%
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• Q8.What is the maximum permissible limit of daily exposure to noise level without causing damage to hearing?

  • A80 dB
  • B85 dB
  • C90 dB
  • D95 dB
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• Q9.The source of endogenous radiation is

  • ARadon
  • BPotassium
  • CThorium
  • DUranium
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• Q10.What is the suggested level of noise that people can tolerate without damage to their hearing?

  • A60 dB
  • B85 dB
  • C110 dB
  • D120 dB
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Answer key

Q1: A. 70 dB; Q2: A. Candela; Q3: B. 280-320 nm; Q4: B. 200 to 400 nm; Q5: B. UV-B; Q6: C. Radioactivity; Q7: A. 8%; Q8: B. 85 dB; Q9: B. Potassium; Q10: B. 85 dB.

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