The ____________ of the fluid residing within the temperature sensing element (bulb) of a filled system thermometer varies with temperature shifts ?
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Answer: D. All A., B. and C.
Explanation
Thermal expansion causes the internal filling fluid to change in volume as temperatures rise or fall. Pressure inside the sealed thermal bulb varies proportionally with temperature shifts according to gas laws. Temperature changes also alter the density and viscosity properties of liquid fills within the sensing bulb. Filled system thermometers operate on the thermal expansion principles of liquids, vapors, or gases. Sealed capillary tubes transmit pressure changes from the thermal bulb to a remote bourdon tube indicator. Fluid properties change dynamically when subjected to thermal energy variations inside closed instrument bulbs.
Industrial temperature monitoring often employs rugged filled thermal systems in hazardous chemical environments. Local and remote temperature indication relies on these robust mechanical expansion mechanisms reliably. Process operators use filled thermometers where electrical power is unavailable or unsafe to install. Option A is incomplete because volume and viscosity properties also experience significant temperature-driven shifts. Option B is incomplete because pressure and fluid viscosity properties change simultaneously inside the bulb. Option C is incomplete because pressure and volume variations occur alongside viscosity shifts in thermal fluids.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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