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Measurement and Instrumentation

Measurement and Instrumentation
The rectifier instrument is not free from

Frequency error
All of the listed here
Temperature error
Wave shape error

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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

 0.917 lead.
 0.917 lag.
 0.6 lead.
 0.6 lag.

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

400V and 200V
300V each
One of the meters out of the range and other 100V
360V and 240V

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Measurement and Instrumentation
Schering bridge is used to measure which of the following?

 Inductance.
 Resistance.
  Capacitance.
 Frequency.

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Temperature
 Current
 Voltage
 Both Voltage and Temperature

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Measurement and Instrumentation
To measure 5 volts, if one selects a 0-100 volt range voltmeter which is accurate with in ± 1%, then the error in this measurement may be up to

 ± 20%
 ± 2.5%
 ± 7.5 %
 ± 1.5%

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MORE MCQ ON Measurement and Instrumentation

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