Metrology and Measuring Instruments (MMI) Quiz

Part- 1

 

Metrology and Measuring Instruments (MMI) Quiz

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.

(A) Arnold Young
(B) Taylorson
(C) Johanson
(D) Lord Kelvin

... Answer is (D)

 

2. The ease with which observations can be made accurately is referred to as

(A) Readability
(B) Sensitivity
(C) Accuracy
(D) Precision

... Answer is (A)

 

3. Accuracy of measuring equipment is

(A) The closeness with which a measurement can be read directly from a measuring instrument
(B) A measure of how close the reading is to the true size.
(C) The difference between measured value and actual value the smallest change in measurand that can be measured
(D) the capability to indicate the same reading again and again for a given measurand.

... Answer is (B)

 

4. Which of the following errors are generally distributed in accordance with the Gaussian distribution

(A) Controllable errors
(B) Calibration errors
(C) Avoidable errors
(D)Random errors

... Answer is (D)

 

5. Tolerances are specified

(A) To obtain desired fits
(B) Because it is not possible to manufacture a size exactly
(C) To obtain high accuracy
(D) To have proper allowance

... Answer is (B)

 

6. Which of the following is the most important characteristic of a measuring instrument in general

(A) Precision
(B) Accuracy
(C) Repeatability
(D) Sensitivity

... Answer is (C)

 

7. Sensitivity and range of measuring instrument have

(A) Direct relationship
(B) Linear relationship
(C) Inverse relationship
(D) Unpredictable relationship

... Answer is (C)

 

8. Systematic errors are

(A) Randomly distributed
(B) Regularly repetitive in nature
(C) Distributed on both + ye and - ye sides of mean value
(D) Unknown errors

... Answer is (B)

 

9. Precision of measuring equipment is

(A) The closeness with which a measurement can be read directly from a measuring instrument
(B) A measure of how close the reading is to the true size
(C) The difference between measured value and actual value
(D) The smallest change in measurand that can be measured

... Answer is (A)

 

10. The maximum amount by which the result differs from the true value is called

(A) Correction
(B) Discrepancy
(C) Error
(D) Accuracy

... Answer is (D)

 

11. Response is defined as the measure of a system's fidelity to purpose. The response of measuring instruments may be considered to the following cases

(A) Amplitude response
(B) All of the above.
(C) Phase response
(D) Delay or rise time

... Answer is (B)

 

12. Which of the following can be used to scribe lines parallel to the edges of a part

(A) Vernier calipers
(B) Screw gauge
(C) Divider
(D) Hermaphrodite caliper

... Answer is (D)

 

13. Which of the following can't fall under the head ? controllable errors

(A) Calibration errors
(B) Environmental errors
(C) Avoidable errors
(D) Random errors

... Answer is (D)

 

14. Which of the following errors are regularly repetitive in nature

(A) Systematic errors
(B) Random errors
(C) Illegitimate errors
(D) Controllable errors

... Answer is (A)

 

15. Which of the following errors are inevitable in the measuring system and it would be vainflul exercise to avoid them

(A) Systematic errors
(B) Random errors
(C) Calibration errors
(D) Environmental errors

... Answer is (B)

 

16. Which of the following instruments is most accurate

(A) Vertical caliper
(B) Manometric screw gauge
(C) Optical projector
(D) Mechanical comparator

... Answer is (C)

 

17. Which of the following refers to parasitic error.

(A) Error, often gross, which results from incorrect execution of measurement
(B) Algebraic difference between the results of measurement and the value of comparison
(C) Error which varies in an unpredictable manner in absolute value and in sign when a large number of measurements of the same value of a quantity are made under practically identical conditions.
(D) Disagreement between the result of measurement and the value of the quantity measured

... Answer is (A)

 

18. Which of the following characterises the dispersion of the results obtained in a series of measurements of the same value of a quantity measured

(A) Absolute error
(B) Relative error
(C) Root mean square deviation
(D) Uncertainty of measurement

... Answer is (C)

 

19. A surface gauge is used for

(A) Levelling the surface plate
(B) Checking the surface fmish
(C) Laying out the work accurately
(D) Finding the depth of the surface

... Answer is (C)

 

20. Parasitic error is caused due to

(A) Improper use of measuring instrument
(B) Wrong design of instrument
(C) Changes in ambient conditions
(D) Errors in computation

... Answer is (D)