Engineering :: Heat Transfer

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A Foreman of an automobile workshop wants to measure the temperature inside the piston of a car, whose temperature will be of the order of 700?C (accurate upto 1?C). The best thermometer to use is

[A].	Platinum resistance thermometer	[B].	Thermo electric thermometer
[C].	Constant volume hydrogen thermometer	[D].	Constant volume nitrogen thermometer
[E].	Optical pyrometer

Answer: Option B

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