Measurement and Instrumentation Which of the following instruments can be used to measure AC current only? Induction type ammeter Moving iron voltmeter Moving iron ammeter Permanent Magnet Type ammeter Induction type ammeter Moving iron voltmeter Moving iron ammeter Permanent Magnet Type ammeter ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation Which of the following cannot be measured by multimeters? Voltage Resistance Frequency Current Voltage Resistance Frequency Current ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read - 795 W. + 795 W. - 597 W. + 597 W. - 795 W. + 795 W. - 597 W. + 597 W. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A 0 - 200 V voltmeter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by this instrument is 50 V. What is the limiting error? 4% 3% 2% 5% 4% 3% 2% 5% ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of Contact resistance. All of above. Thermoelectric emfs. Resistance of connecting leads. Contact resistance. All of above. Thermoelectric emfs. Resistance of connecting leads. ANSWER DOWNLOAD EXAMIANS APP
Measurement and Instrumentation In a wheatstone bridge, a change of 6 Ω in the unknown arm of bridge is required to produce a change in deflection of 2.4 mm of the galvanometer. The sensitivity is 5.0 mm/Ω 0.8 mm/Ω 0.4 mm/Ω 2.5 mm/Ω 5.0 mm/Ω 0.8 mm/Ω 0.4 mm/Ω 2.5 mm/Ω ANSWER DOWNLOAD EXAMIANS APP
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