Measurement and Instrumentation Which of following are needed both for protection and metering? Wattmeters. Energy meter. Instrument transformer. Power factor meters. Wattmeters. Energy meter. Instrument transformer. Power factor meters. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A moving iron instrument can be used for AC only DC only Both DC& AC None of the listed here AC only DC only Both DC& AC None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Instrument transformers are Pottential transformers Both current and potential transformers Current transformers Power transformers Pottential transformers Both current and potential transformers Current transformers Power transformers ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A variable w is related to three other variables x, y and z as w = xy/z. The variables are measured with meters of accuracy ± 0.5% reading, ± 1% of full scale value and ± 1.5% reading. The actual readings of the three meters are 80, 20 and 50 with 100 being the full scale value for all three. The maximum uncertainty in the measurement of w will be ± 7% ± 6% ± 8% ± 5% ± 7% ± 6% ± 8% ± 5% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be 0.2% less. 0.4 more. 0.2% more. 0.4% less. 0.2% less. 0.4 more. 0.2% more. 0.4% less. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Which of following is a vector quantity? Magnetic field intensity. Magnetic potential. Flux density. Relative permeability. Magnetic field intensity. Magnetic potential. Flux density. Relative permeability. ANSWER DOWNLOAD EXAMIANS APP
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