Which of the following elements is common to...

Question 1 of 270705eccefa5bacbc34ba4d4871d

Which of the following elements is common to all indicating instruments?

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Question 1 of 27070

Q

Which of the following elements is common to all indicating instruments?

🔍 Key Concepts

• Indicating instruments show a value to a human observer • Think about what ALL types of indicators (mechanical, electrical, pneumatic) must have in order for a person to read them • Some parts are only used in certain kinds of gauges (e.g., pressure gauges)

💭 Think About

• Imagine a simple mechanical gauge, a digital meter, and a tank level sight glass—what do they all need so you can tell what the value is? • Which options are specific to one type of measurement (like pressure) or one type of power source (like electricity)? • Ask yourself: could there be an indicating instrument that works without electricity or without a reset function?

✅ Before You Answer

• Check which choice would apply to any type of indicating instrument, regardless of how it’s powered • Eliminate options that are clearly tied to only one class of instruments (e.g., only pressure gauges, only electrical meters) • Confirm that your final choice is something a human must see or use to interpret the indication