Measurement and Instrumentation The error of an instrument is normally given as a percentage of Mean value Full-scale value Rms value Measured value Mean value Full-scale value Rms value Measured value ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation An current of is measured with a thermocouple, 5 A full scale meter. What is the meter reading? 5 A. 3 A. 2 A. 2+3√2 A. 5 A. 3 A. 2 A. 2+3√2 A. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is 0.4 mm/Ω 5.0 mm/Ω 0.8 mm/Ω 2.5 mm/Ω 0.4 mm/Ω 5.0 mm/Ω 0.8 mm/Ω 2.5 mm/Ω ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a moving coil instrument, the deflecting torque is proportional to Squareroot of the current Current Square of the current Sine of the measurand Squareroot of the current Current Square of the current Sine of the measurand 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 Active power of Y phase Reactive power of R phase Active power in R phase Power proportional to 3 phase power if the load is balanced Active power of Y phase Reactive power of R phase Active power in R phase Power proportional to 3 phase power if the load is balanced ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Why is a MISC meter not recommended for DC measurement? The meter does not respond to DC signals The meter is calibrated for AC and it’s error for DC would be high The error is high due to hysteresis effect The error is high due to eddy current effect The meter does not respond to DC signals The meter is calibrated for AC and it’s error for DC would be high The error is high due to hysteresis effect The error is high due to eddy current effect ANSWER DOWNLOAD EXAMIANS APP
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