Electrical Measurements And Units(Electrical Engineering Questions ) Questions and Answers

Question 1. Instruments are subdivided into active and passive based on whether the output of instrument is produced by the quantity being measured simply changes the magnitude of some external power source. The pressure measuring device and the float-type petrol tank level indicator are example of
  1.    Active instruments
  2.    Passive instruments
  3.    Former is active instrument and later is passive instrument
  4.    Former is passive instrument and later is active instrument
Explanation:-
Answer: Option D. -> Former is passive instrument and later is active instrument
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. The output of an analogue instrument varies
  1.    Continuously and can have an infinite number of values within its range of instruments
  2.    In discrete steps and can have an infinite number of values within its range of instruments
  3.    Continuously and can have an finite number of values within its range of instruments
  4.    In discrete steps and can have an infinite number of values within its range of instruments
Explanation:-
Answer: Option A. -> Continuously and can have an infinite number of values within its range of instruments
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. The microcomputer performs its computations in
  1.    Analogue form
  2.    Digital form
  3.    Either analogue form or digital form depending on their applications
  4.    None of these
Explanation:-
Answer: Option B. -> Digital form
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. In terms of usage, deflection type instruments are
  1.    More convenient than null type instrument
  2.    Less convenient than null type instruments
  3.    Both are equally convenient
  4.    None of these
Explanation:-
Answer: Option A. -> More convenient than null type instrument
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. Considering cost of instruments, which is a better choice, active or passive?
  1.    Active instruments
  2.    Passive instruments
  3.    Cost of both active and passive instruments are approximately same
  4.    None of these
Explanation:-
Answer: Option B. -> Passive instruments
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. In deadweight gauge, weights are added on the top of piston until the piston reaches a datum level. The datum level is known as
  1.    Null point, where the downward force balances the fluid pressure
  2.    Lowest point of the container
  3.    Highest level of fluid in the container
  4.    None of these
Explanation:-
Answer: Option A. -> Null point, where the downward force balances the fluid pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. The accuracy of the deflection type instruments and of the null type instruments depends on
  1.    Linearity, calibration of spring
  2.    Calibration of spring, linearity and calibration of weights
  3.    Linearity and calibration of spring, calibration of weights
  4.    Both depends on calibration of weight
Explanation:-
Answer: Option C. -> Linearity and calibration of spring, calibration of weights
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Accuracy of an measuring instrument indicates the
  1.    Closeness of the output reading to the true value
  2.    Ratio of output value to the input value
  3.    Change in output with each change in input
  4.    Degree of freedom from random errors
Explanation:-
Answer: Option A. -> Closeness of the output reading to the true value
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. If a pressure gauge of range 0-10 bar has a quoted inaccuracy of ±1.0 % of full scale reading, then it means
  1.    Minimum expected error in any reading is 0.1 bar
  2.    Maximum expected error in any reading is 0.1 bar
  3.    Maximum expected error in any reading is 1 bar
  4.    Minimum expected error in any reading is 1 bar
Explanation:-
Answer: Option B. -> Maximum expected error in any reading is 0.1 bar
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. To read and record a measurement, the indicating type instrument
  1.    Always requires human intervention
  2.    Does not requires human intervention
  3.    Requires human intervention only when the instrument consists of a rotating pointer moving against a scale
  4.    Requires human intervention only when the instrument consists of a rotating scale moving against a pointer
Explanation:-
Answer: Option A. -> Always requires human intervention
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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