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單項選擇題

Bourdon Tube is probably the most commonly used （） measuring instrument.

A.the absolute pressure
B.the gauge pressure
C.the vacuum pressure
D.the differential pressure

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單項選擇題

Movement of the diaphragm or bellows is （） by a linkage to a needle or pointer display to indicate the differential pressure between two sides of the diaphragm or bellows.

A.measured
B.recorded
C.transferred
D.controlled

單項選擇題

When two different metals are joined to form a closed circuit and exposed to different temperatures at their junctions （） which can be used to measure temperature.

A.a current will flow
B.a power will develop
C.a heat will flow
D.a pressure will produce