Measurement and Instrumentation One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land? 0.73 0.84 0.65 1 0.73 0.84 0.65 1 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be 250 Hz. 500 Hz. 625 Hz. 400 Hz. 250 Hz. 500 Hz. 625 Hz. 400 Hz. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The errors introduced by an instrument fall in which category ? Environmental errors Systematic errors Random errors Gross errors Environmental errors Systematic errors Random errors Gross errors ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is 1 µNm. 200 µNm. 100 µNm. 2 µNm. 1 µNm. 200 µNm. 100 µNm. 2 µNm. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is 0.6 lag. 0.917 lead. 0.6 lead. 0.917 lag. 0.6 lag. 0.917 lead. 0.6 lead. 0.917 lag. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A first order instrument is characterized by Static sensitivity and time constant Static sensitivity, damping coefficient and natural frequency of oscillations Time constant only Static sensitivity and damping coefficient Static sensitivity and time constant Static sensitivity, damping coefficient and natural frequency of oscillations Time constant only Static sensitivity and damping coefficient ANSWER DOWNLOAD EXAMIANS APP
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