Questions: Question 17 1 pts Technician A says that the micrometer operates on a simple principle: The spindle has 20 threads per inch, so one revolution of the thimble will advance or retract the spindle 1 / 20 of an inch. Technician B says that spindle has 50 threads per inch, so one revolution of the thimble will advance or retract the spindle 1 / 50 of an inch. Who is correct? A only B only Both A and B Neither A nor B

Question 17 1 pts Technician A says that the micrometer operates on a simple principle: The spindle has 20 threads per inch, so one revolution of the thimble will advance or retract the spindle 1 / 20 of an inch. Technician B says that spindle has 50 threads per inch, so one revolution of the thimble will advance or retract the spindle 1 / 50 of an inch. Who is correct? A only B only Both A and B Neither A nor B
Transcript text: Question 17 1 pts Technician A says that the micrometer operates on a simple principle: The spindle has 20 threads per inch, so one revolution of the thimble will advance or retract the spindle $1 / 20$ of an inch Technician B says that spindle has 50 threads per inch, so one revolution of the thimble will advance or retract the spindle $1 / 50$ of an inch. Who is correct? A only B only Both A and B Neither A nor B
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Solution

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Solution Steps

Step 1: Understanding the Micrometer's Operation Principle

A micrometer is a precision measuring instrument that uses a screw to convert small distances into larger rotations of the screw, which can be read from a scale. The number of threads per inch on the spindle determines how much the spindle moves per revolution of the thimble.

Step 2: Analyzing Technician A's Statement

Technician A claims that the spindle has 20 threads per inch. This means that one complete revolution of the thimble would move the spindle by \( \frac{1}{20} \) of an inch. This statement is mathematically correct if the spindle indeed has 20 threads per inch.

Step 3: Analyzing Technician B's Statement

Technician B claims that the spindle has 50 threads per inch. This implies that one complete revolution of the thimble would move the spindle by \( \frac{1}{50} \) of an inch. This statement is also mathematically correct if the spindle indeed has 50 threads per inch.

Step 4: Determining the Correctness of Each Technician

The problem does not provide specific information about the actual number of threads per inch on the spindle. Therefore, we cannot definitively say which technician is correct without additional context. However, since both statements are mathematically correct based on their respective assumptions, neither technician is inherently incorrect based on the information given.

Final Answer

\(\boxed{\text{Neither A nor B}}\)

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