Measurement and Instrumentation Which of following are needed both for protection and metering? Instrument transformer. Energy meter. Power factor meters. Wattmeters. Instrument transformer. Energy meter. Power factor meters. Wattmeters. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor? 200W 150W 50W 100W 200W 150W 50W 100W ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The pointer of an indicating instrument is generally made of _______ Aluminium Silver Copper Soft steel Aluminium Silver Copper Soft steel 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. 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. 1 is false but 2 is true. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A meter has a full-scale deflection of 90o at a current of 1 A. The response of the meter is square law. Assuming spring control, the current for a deflection at 45o will be 0.67 A. 0.70 A. 0.25 A. 0.50 A. 0.67 A. 0.70 A. 0.25 A. 0.50 A. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Comparison methods are used because they are expensive. when a high accuracy of measurement is required. because they take least time in measurement. because they are most simple. because they are expensive. when a high accuracy of measurement is required. because they take least time in measurement. because they are most simple. ANSWER DOWNLOAD EXAMIANS APP
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