Measurement and Instrumentation How many fundamental units are there ? 7 6 4 8 7 6 4 8 ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be 50 W. 0 W. 100 W. 25 W. 50 W. 0 W. 100 W. 25 W. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation The measurement of a quantity is a comparison of an unknown quantity with known quantity. is a comparison of an unknown quantity with another quantity. is a comparison of an unknown quantity with standard. none of these. is a comparison of an unknown quantity with known quantity. is a comparison of an unknown quantity with another quantity. is a comparison of an unknown quantity with standard. none of these. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In DC potentiometer measurments, a second reading is often taken after reversing the polarities of the DC supply and the unknown voltage and the average of the two reading is taken. This is with a view of eliminate the effects of Errorneous standardisation. Stray magnetic fields. Stray thermal emfs. Ripples of the DC supply. Errorneous standardisation. Stray magnetic fields. Stray thermal emfs. Ripples of the DC supply. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In which of the transformer is the secondary nearly short circuited under normal operating condition? PT. CT. Power transformer. Distribution transformer. PT. CT. Power transformer. Distribution transformer. 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 Power proportional to 3 phase power if the load is balanced Active power of Y phase Active power in R phase Reactive power of R phase Power proportional to 3 phase power if the load is balanced Active power of Y phase Active power in R phase Reactive power of R phase ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS