Measurement and Instrumentation Electrostatic instruments are used as Both ammeter and voltmeter Voltmeters only Ammeters only Wattmeter only Both ammeter and voltmeter Voltmeters only Ammeters only Wattmeter only ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A multirange instrument has Multiple shunt or series resistance inside the meter Multirange meters inside the measurement system Multicoil arrangement Variable turns of coil Multiple shunt or series resistance inside the meter Multirange meters inside the measurement system Multicoil arrangement Variable turns of coil ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ? ± 1.5% ±0.5% ±3.5% ± 3.0% ± 1.5% ±0.5% ±3.5% ± 3.0% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a single phase energy meter, braking torque is provided by Air friction Fluid friction Permanent magnet None of the listed here Air friction Fluid friction Permanent magnet None of the listed here 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 Reactive power of R phase Active power of Y phase Power proportional to 3 phase power if the load is balanced Active power in R phase Reactive power of R phase Active power of Y phase Power proportional to 3 phase power if the load is balanced Active power in R phase ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit. 1 is false but 2 is true. Both 1 and 2 are true. Both 1 and 2 are false. 1 is true but 2 is false. 1 is false but 2 is true. Both 1 and 2 are true. Both 1 and 2 are false. 1 is true but 2 is false. ANSWER DOWNLOAD EXAMIANS APP
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