Measurement and Instrumentation
The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following?

  Period and frequency measurement modes respectively.
 Frequency measurment modes only.
 Period measurment modes only.
 Frequency and period measurment modes, respectively.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
Assertion (A) : It is always desirable to take the reading of an indicating instrument very close to the full scale reading. Reason (R) : Accuracy of an indicating instrument is maximum at the full scale deflection and error increases as reading comes closer to the beginning of the scale.

 A is false bur R is true
 Both A and R are true and R is the correct explanation of A
 A is true but R is false
 Both A and R are true but R is NOT the correct explanation of A

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
A DC potentiometer is the best means available for the measurement of DC voltage because

  It is based on null balance technique.
 None of above.
 The precision in measurment is independent of the type of the defector used.
 It is possible to standardize before a measurement is undertaken.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
A resistance is measured by the voltmeter-ammeter method employing dc excitation and a voltmeter of very high resistance connected directly across the unknown resistance. If the voltmeter and ammeter reading are subject to maximum possible errors of ± 2.4 % and ± 1.0 % respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is nearly

 ± 2.4%
 ± 1%
 ± 1.4%
 ± 3.4%

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Measurement and Instrumentation