Q. What is the primary cause of a zero error? (2019)
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A.
Instrument wear and tear
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B.
Incorrect calibration
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C.
Environmental factors
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D.
User error
Solution
A zero error occurs when an instrument does not read zero when it should, often due to incorrect calibration.
Correct Answer: B — Incorrect calibration
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Q. Which of the following is an example of a random error? (2020)
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A.
Calibration error in a scale
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B.
Fluctuations in temperature during measurement
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C.
Incorrect reading of a dial
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D.
Using a faulty instrument
Solution
Random errors are caused by unpredictable variations in the measurement process, such as fluctuations in temperature.
Correct Answer: B — Fluctuations in temperature during measurement
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Q. Which of the following is NOT a common source of systematic error? (2021)
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A.
Calibration errors
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B.
Environmental conditions
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C.
Random fluctuations
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D.
Instrument bias
Solution
Random fluctuations are not a source of systematic error; they are associated with random errors.
Correct Answer: C — Random fluctuations
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Q. Which of the following methods can help reduce zero error? (2022)
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A.
Using a different measurement technique
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B.
Regular calibration of instruments
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C.
Taking more measurements
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D.
Ignoring the error
Solution
Regular calibration of instruments can help reduce zero error by ensuring that the instrument reads zero accurately.
Correct Answer: B — Regular calibration of instruments
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Q. Which type of error can be reduced by taking multiple measurements? (2022)
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A.
Systematic error
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B.
Random error
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C.
Zero error
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D.
Gross error
Solution
Random errors can be minimized by taking multiple measurements and averaging the results.
Correct Answer: B — Random error
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