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Electrical Engineering Objective Questions { Electrical And Electronic Measurement }



92. Eddy current damping can not be used for moving iron instruments because the
A. weight of instrument increases
B. presenceof premanent magnet required for this purpose will affect the defelection and hence the instrument reading
C. size of instrument increases
D. eddy currents will pass through iron and thereby cause loss

93. Precision measurement of resistances is generally carried out by
A. potentiometer method
B. CRO method
C. voltmeter-ammeter method
D. bridge method

94. Which of the following methods is best suited for measurement of a dc potential difference of 1 volt?
A. bridge method
B. voltmeter
C. CRO
D. notentinmeter

95. Instrument accuracy is defined as
A. the measure of consistancey or reproduci-bility of the measurements
B. closeness with which an instrument reading approaches the true value of the quantity being measured
C. the smallest measurable input change
D. the ratio of the change in output signal to the change in the input signal

96. Instrument efficiency is defined as
A. the ability of the instrument to read the smallest input changes
B. the ratio of the measured quantity at full scale to the power taken by the instrument at full scale
C. the ratio of the change in output signal to the change in input signal
D. the ability of the system to reproduce the output in the same form as the input

97. Resolution of a measuring instrument is defined as
A. the smallest measurable input change
B. consistency or the reproducibility of the measurement
C. ability to reproduce the output in the same from as the input
D. ratio of the change of output signal to change in the input signal

98. Reproducibility measurement of an instrument gives an indication of
A. resolution
B. precision
C. reliability
D. accuracy

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