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CSS Solved Papers
Physics Chemistry

Engineering :: Fluid Mechanics and Hydraulic Machines

  A low pressure of the order of 10-10 torr is to be measured in a chamber. Which of the following device can be used for this?
[A]. Manometer[B]. Bourdon vacuum gauge
[C]. Pirani gauge[D]. Ionisation chamber
[E]. McLeod gauge    

Answer: Option D
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