Measurement and Instrumentation In which of the transformer is the secondary nearly short circuited under normal operating condition? PT. Distribution transformer. CT. Power transformer. PT. Distribution transformer. CT. Power transformer. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The error of an instrument is normally given as a percentage of Measured value Rms value Full-scale value Mean value Measured value Rms value Full-scale value Mean value ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A dynamometer wattmeter can be used for Both DC and AC DC only AC only Any of the listed here Both DC and AC DC only AC only Any of the listed here ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are inclined at 30o. parallel. inclined at 60o. perpendicular. inclined at 30o. parallel. inclined at 60o. perpendicular. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance ± 2.5% ± 1% ± 1.5% ± 3.5% ± 2.5% ± 1% ± 1.5% ± 3.5% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures Power proportional to 3 phase power if the load is balanced Active power of Y phase Active power in R phase Reactive power of R phase Power proportional to 3 phase power if the load is balanced Active power of Y phase Active power in R phase Reactive power of R phase ANSWER DOWNLOAD EXAMIANS APP
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