The temperature inside a furnace is usually measured by which of the following? Options: A . &nbspOptical pyrometer B . &nbspMercury thermometer C . &nbspAlcohol thermometer D . &nbspAny of the above

The temperature inside a furnace is usually measured by which of the following?

Question - The temperature inside a furnace is usually measured by which of the following?

Options:

A . Optical pyrometer

B . Mercury thermometer

C . Alcohol thermometer

D . Any of the above

Answer: Option A

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