Engineering Metrology(Engineering > Mechanical Engineering ) Questions and Answers

Question 1.  Who made the following classic statement. "When you can measure what you are speaking about and express it in numbers, you know something about it, and when you can't express it in numbers, your knowledge, is of a meagre and unsatisfactory kind. It may be the beginning of knowledge, but you have scarcely in your thought advanced to the stage of science.
  1.    Arnold Young
  2.    Taylorson
  3.    Johanson
  4.    Lord Kelvin
Explanation:-
Answer: Option D. -> Lord Kelvin
Question 2.  Accuracy of measuring equipment is
  1.    The closeness with which a measurement can be read directly from a measuring instrument.
  2.    A measure of how close the reading is to the true size.
  3.    The difference between measured value and actual value the smallest change in measurand that can be measured
  4.    (e) the capability to indicate the same reading again and again for a given measurand.
Explanation:-
Answer: Option B. -> A measure of how close the reading is to the true size.
Question 3.  Which of the following errors are generally distributed in accordance with the Gaussian distribution
  1.    Controllable errors
  2.    Calibration errors
  3.    Avoidable errors
  4.    Random errors
Explanation:-
Answer: Option D. -> Random errors
Question 4.  The ease with which observations can be made accurately is referred to as
  1.    Readability
  2.    Sensitivity
  3.    Accuracy
  4.    Precision
Explanation:-
Answer: Option A. -> Readability
Question 5.  Sensitivity and range of measuring instrument have
  1.    Direct relationship
  2.    Linear relationship
  3.    Inverse relationship
  4.    Unpredictable relationship
Explanation:-
Answer: Option C. -> Inverse relationship
Question 6.  Tolerances are specified
  1.    To obtain desired fits
  2.    Because it is not possible to manufacture a size exactly
  3.    To obtain high accuracy
  4.    To have proper allowance
Explanation:-
Answer: Option B. -> Because it is not possible to manufacture a size exactly
Question 7.  Which of the following is the most important characteristic of a measuring instrument in general
  1.    Precision
  2.    Accuracy
  3.    Repeatability
  4.    Sensitivity
Explanation:-
Answer: Option C. -> Repeatability
Question 8.  Systematic errors are
  1.    Randomly distributed
  2.    Regularly repetitive in nature
  3.    Distributed on both + ye and - ye sides of mean value
  4.    Unknown errors
Explanation:-
Answer: Option B. -> Regularly repetitive in nature
Question 9. . Which of the following can't fall under the head ? controllable errors
  1.    Calibration errors
  2.    Environmental errors
  3.    Avoidable errors
  4.    Random errors
Explanation:-
Answer: Option D. -> Random errors
Question 10.  Precision of measuring equipment is
  1.    The closeness with which a measurement can be read directly from a measuring instrument
  2.    A measure of how close the reading is to the true size
  3.    The difference between measured value and actual value
  4.    The smallest change in measurand that can be measured
Explanation:-
Answer: Option A. -> The closeness with which a measurement can be read directly from a measuring instrument
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