Screw Gauge Puzzles
1. What is the least count of a screw gauge?
Hint: It is the smallest measurement the instrument can measure.0.01 mm (or 0.001 cm)
2. What is the pitch of a screw gauge?
Hint: It is the distance moved by the spindle in one full rotation.It is the distance moved by the screw per full rotation, usually 0.5 mm or 1 mm.
3. What is the formula for the least count of a screw gauge?
Hint: It depends on pitch and the number of divisions on the circular scale.Least count = Pitch / Number of divisions on the circular scale
4. What is the main scale and circular scale in a screw gauge?
Hint: One scale is linear, and the other is rotational.The main scale is a linear scale, while the circular scale rotates with the screw.
5. What is zero error in a screw gauge?
Hint: It occurs when the spindle touches the anvil, but the reading is not zero.It is the error caused when the zero mark of the circular scale does not coincide with the reference line of the main scale.
6. What is a positive zero error in a screw gauge?
Hint: It occurs when the zero mark is below the reference line.When the zero of the circular scale is below the main scale reference line.
7. How is a negative zero error corrected in a screw gauge?
Hint: You need to add or subtract the zero error from the final reading.A negative zero error is corrected by adding the absolute value of the error to the final reading.
8. How many divisions are there on the circular scale of a screw gauge?
Hint: It usually ranges from 50 to 100 divisions.Typically, a screw gauge has 100 divisions on the circular scale.
9. What is the function of a ratchet in a screw gauge?
Hint: It prevents excessive tightening.The ratchet prevents over-tightening of the screw to avoid damage and ensure accurate measurements.
10. What is the principle of a screw gauge?
Hint: It works based on rotational motion converting to linear motion.It works on the principle that a screw advances linearly when rotated due to its threads.
