Question 39General Subjects - QMED
70% to passWhat type of direct reading thermometer works on the principle of differential expansion of dissimilar metals as the temperature rises and features a rotary dial scale?
ABimetallic thermometer
BLiquid-in-glass thermometer
CBourdon tube thermometer
DThermocouple pyrometer
AI Explanation
A) Bimetallic thermometer is the correct answer. A bimetallic thermometer works on the principle of differential expansion of two dissimilar metals as the temperature rises. This causes the bimetallic strip to bend, which in turn moves a rotary dial scale to indicate the temperature. This type of direct reading thermometer is commonly used in various applications, including the US Coast Guard Captain's License Examinations. The other options are incorrect because: B) Liquid-in-glass thermometers use the expansion of a liquid, C) Bourdon tube thermometers use the expansion of a gas, and D) Thermocouple pyrometers measure temperature based on the thermoelectric effect, not the differential expansion of metals.
Related Questions
Q324:What type of valve is shown in the illustration? Illustration GS-0047 Q72:Which of the following technologies would be associated with a Type III marine s... Q354:In the hydraulic anchor windlass system illustrated, pressure relief of the main... Q113:The main reason for having a low suction line on the fuel oil service or settlin... Q177:The best tool to use when attempting to widen the opening of a flanged joint, in...
Ready to test your knowledge?
Take a General Subjects - QMED Practice ExamOfficial Resources