Q241
Open questionLoading effect is primarily caused by instruments having:
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ECE · all questionsMeasurement And Instrumentation
Measurement And Instrumentation
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Q242
Open questionA dual trace oscilloscope usually offers two modes, chop and alternate.
The alternate mode can be used for displaying.
The alternate mode can be used for displaying.
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Q243
Open questionIn a flux meter, the controlling torque is
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Q244
Open questionThe simplest and most common method of reducing any effect of inductive coupling between measurement and power circuits is achieved by using
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Q245
Open questionThe Q factor of an inductor would be higher it is made of
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Q246
Open questionA seismic transducer working in the displacement mode should be designed to have
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Q247
Open questionThe power of a three phase, three wire balanced system was measured by two Wattmeter method. The reading of one Wattmeter was found to be doubled that of other. What is the power factor of the system?
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Q248
Open questionConsider the following data for the circuit shown above:
Ammeter : Resistance 0.2 Ω; Reading 5.0 A
Voltmeter: Resistance 2 kΩ ; Reading 200 V
Wattmeter : Current coil resistance 0.2 Ω
Pressure coil resistance 2 KΩ
Load : Power factor = 1
The reading of the Wattmeter is:
Ammeter : Resistance 0.2 Ω; Reading 5.0 A
Voltmeter: Resistance 2 kΩ ; Reading 200 V
Wattmeter : Current coil resistance 0.2 Ω
Pressure coil resistance 2 KΩ
Load : Power factor = 1
The reading of the Wattmeter is:
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Q249
Open questionA 100 Ω resistive potentiometer is used with an input supply voltage of 10 V. If the thermal resistance 30°C/W and the ambient temperature is 40°C, the temperature of the POT is
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Q250
Open questionThe measured value of a capacitor is 100 µF. The true value of the capacitor is 110 µF. The percentage relative error is
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Q251
Open questionA wire strain gauge element subjected to a strain has a gauge factor of 2, a resistance of 125 ohms and is of 1 m length. For a change in length of the wire by 0.005 m, the change in the resistance will be
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Q252
Open questionThe following could be the one of the errors in an energy meter
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Q253
Open questionThe most useful transducer for displacement sensing with excellent sensitivity, linearity and resolution is
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Q254
Open questionWhich of the following is NOT a characteristic of an ideal transducer?
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Q255
Open questionLow pressure is measured using:
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Q256
Open questionA 300 V, 5 A, 0.2 pf low power factor wattmeter is used to measure the power consumed by a load. The wattmeter scale has 150 divisions and the pointer is on the 100th division. The power consumed by the load (in watts) is:
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Q257
Open questionThe principle of working of a D' Arsonval Galvanometer is based upon
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Q258
Open questionThe standard for long distance analog signal transmission in process control industry is
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Q259
Open questionSome of the functional building blocks of a measurement system are:
Primary Sensing element (PSE)
Variable conversion Element (VCE) or Transducer
Data Transmission element (DTE)
Variable manipulation Element (VME)
Data Presentation Element (DPE)
The correct sequential connection of a the functional building blocks for an electronic pressure gauge will be:
Primary Sensing element (PSE)
Variable conversion Element (VCE) or Transducer
Data Transmission element (DTE)
Variable manipulation Element (VME)
Data Presentation Element (DPE)
The correct sequential connection of a the functional building blocks for an electronic pressure gauge will be:
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Q260
Open questionConsider the following statements regarding sources of error in a Q-meter:
1. If a coil with resistance R is connected in direct measurement mode and if the residual resistance of Q-meter is 0.1 R, then the measured Q of the coil would be 1.1 times the actual Q.
2. If the inductance to be measured is less than 0.1 mH, the error due to presence of residual inductance cannot be neglected.
3. The presence of distributed capacitance in a coil modifies the effective Q of the coil.
Which of the above statements are correct?
1. If a coil with resistance R is connected in direct measurement mode and if the residual resistance of Q-meter is 0.1 R, then the measured Q of the coil would be 1.1 times the actual Q.
2. If the inductance to be measured is less than 0.1 mH, the error due to presence of residual inductance cannot be neglected.
3. The presence of distributed capacitance in a coil modifies the effective Q of the coil.
Which of the above statements are correct?
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