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Measurement And Instrumentation
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Q121

The resistance of two coils of a watt-meter are 0.0 Ω and 100 Ω respectively and both are non-inductive. The current through a resistance load is 20 A and the voltage across it is 30 V. In one of the two ways of connecting the voltage coil, the error in the reading would be

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Q122

The use of thermocouple meters for ac measurement leads to a meter scale which is

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Q123

Which one of the following statements is not correct in connection with electrodynamic instruments?

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Q124

Which of the following equipment can check the condition of a transistor?

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Q125

The scale used for moving coil meter is

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Q126

The error in measurement of a DC voltmeter with input signal: 1.5 V, voltage range: 2 V, accuracy: ± (25 ppm of reading + 5 ppm of range) is

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Q127

In wire-wound strain gauges, the change in resistance on application of strain is mainly due to

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Q128

Absolute encoders are normally used for:

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Q129

In a Q meter, distributed capacitance of coil is measured by changing the capacitance of the tuning capacitor. The values of tuning capacitor are C₁ and C₂ for resonant frequency f₁ and 2f₁ respectively. The value of distributed capacitance is:

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Q130

Three phase four wire energy meter is used to measure:

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Q131

Creeping error in energy meter is due to . . . . . . . . voltage.

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Q132

Consider the following regarding essential functional operations of a digital data acquisition system:
1. Handling of analog signals
2. Converting the data to digital form and handling it
3. Making the measurement
4. Internal programming and telemetry
Which of the above are valid in the stated context?

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Q133

A Pneumatic amplifier

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Q134

Consider the following devices:
1. Anemometer
2. Stroboscope
3. Accelerometer
The correct sequence of these devices to measure the rotational speed, vibration and airflow, respectively is,

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Q135

In the given circuit, C₀ is the distributed capacitance of the coil and C is the tuning capacitor. If C = C₁ for the fundamental frequency and C = C₂ for the second harmonic, then the value of C₀ can be expressed a
Measurement and Instrumentation mcq question image

Measurement and Instrumentation mcq question image

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Q136

Telephone traffic is measured

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Q137

Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point be the horizontal scale and the starting point of the two signals are separated by 0.5 cm. The phase difference between the two signals in degrees is

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Q138

In permanent magnet moving coil instruments, damping torque is provided by

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Q139

In an electromagnetic blood flow meter, the induced EMF is directly proportional to:

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Q140

Digital multimeter display is generally . . . . . . . . digits.

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