Measurement MCQ Part-2

Measurement MCQs

1. The difference between the indicated value and the true value of a quantity is_____.

a. Relative error

b. Dynamic error

c. Absolute error

d. Gross error

 

2. The errors introduced by an instrument fall in which category?

a. Environmental errors

b. Gross errors

c. Random errors

d. Systematic errors

 

3. A 0-100 V voltmeter has an accuracy of 1 percent at full-scale reading. What will be the error if it reads 50 V ?

a. 4 percent

b. 2 percent

c. 0.5 percent

d. 1 percent

 

4. The measured value of a capacitor is 205.5 micro farad; whereas its true value is 202.4 micro farad.

The relative error is_____.

a. 1.73%

b. 1.53%

c. 1.94%

d. 1.87%

 

5. Threshold of sensitivity in reference to instrument is______.

a. The value of sensitivity on the lowest scale

b. The value of sensitivity on the highest scale

c. The largest signal which can be measured

d. The smallest signal that causes detectable output

 

6. Sensitivity inaccuracy of a recording instrument means the_____.

a. Amount of input needed to give unit pen deflection

b. Smallest signal required to give detectable output

c. Maximum error in sensitivity displayed by a pen

d. Degree to which the instrument is not sensitive enough to repeat readings.

 

7. Accuracy is defined as the______.

a. Ratio of the change in output signal of an instrument to a change in the input

b. Smallest measurable input change

c. Closeness with which an instrument reading approaches the true value of the quantity being measured

d. Measure of the consistency or reproducibility of the measurement

 

8. The degree of reproducibility among several independent measurements of the same true value under reference conditions is known as_________.

a. Calibration 

b. Linearity

c. Precision

d. Accuracy

9. Which one of the following statements is not correct?

a. An instrument with 2% accuracy is better than another with 5% accuracy

b. It is not possible to have precise measurements which are not accurate

c. Correctness in measurements requires both accuracy and precision

d. Reproducibility and consistency are expressions that best describe precision in measurements

10. Which one of the following statements is correct? 

      The application of the instrument in wrong manner in the procedure of measurement results in a/an

a. Systematic error

b. Instrument error 

c. Random error

d. Gross error

11. Systematic errors are______.

a. Observational errors

b. Instrumental errors

c. Environmental errors

d. All of the above

12. A set of observations has a wide range, so it has______.

a. High precision but low accuracy

b. Low accuracy

c. Low precision

d. High accuracy but low precision

13. The units whose size cannot be chosen independently are called______.

a. Auxiliary fundamental unit

b. Derived unit

c. Absolute unit

d. Fundamental unit

14. Identify the one which is not a fundamental unit in SI system_____.

a. Joule 

b. Meter

c. Kelvin

d. Ampere

15. For defining the standard meter, the wavelength of which material is considered?

a. Xenon

b. Helium

c. Krypton

d. Neon

16. The unit of temperature measurement is_______.

a. Pascal

b. Lumen

c. Kelvin

d. Mole

17. What is the unit of measurement of surface/sheet resistivity?

a. Ohm

b. Ohm / sq. meter

c. Ohm meter

d. Ohm / meter

18. The absolute measurement of resistance involves the measurement of_____.

a. Acceleration

b. Velocity

c. Length and mass

d. Length and time

e. Either (b) or (d)

19. The most stable primary atomic standard for frequency is________.

a. Rubidium standard

b. Quartz standard

c. Cesium beam standard

d. Hydrogen maser standard

20. For time and frequency, the working standard is_______.

a. A RF oscillator

b. LASER

c. Crystal controlled oscillator

d. Microwave oscillator

21. Standard cell_____.

a. Can supply voltages up to 10V

b. Will continue tp have constant voltage irrespective of loading conditions

c. Will have precise and accurate constant voltage when few milliamperes are drawn from it

d. Will have precise and accurate constant voltage when current drawn from it is few microamperes only

22. The internal resistance of a standard Weston cell is of the order of_______.

a. A fraction of an ohm 

b. A few thousand of ohms

c. A few hundred ohms

d. A few ohms

23. The materials to be used in the manufacture of a standard resistance should be of_______.

a. Low resistivity and high temperature coefficient

b. High temperature coefficient

c. Low resistivity

d. High resistivity and low temperature coefficient

24. In resistors two wires side by side in opposite directions are wound in order to______.

a. Increase the resistance

b. Reduce the coil inductance

c. Increase the resistance

d. Give high mechanical strength

25. Which one of the following techniques reduces the residual inductance of standard resistance?

a. Making a bifilar winding on a card

b. Using proper shielding

c. Using material of low temperature coefficient of resistance 

d. Using high resistivity material