ECE · all questions

Measurement And Instrumentation
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Q181

Considering the following statements:
1. Use of digital computer along with transducer maked data manipulation easier.
2. Digital signals are not dependent on signal amplifiers and so are easy to transmit without distortion and external noise.
3. Increased accuracy in pulse count is possible.
4. There are ergonomic advantages in presenting digital data.
The main advantages of digital transducers include

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Q182

Which of the following are used in making resistance temperature detectors?

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Q183

In a vortex shedding flow meter, the shedding frequency is

f = \frac{N _{st} V}{D}

where N_st is

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Q184

Wagner's earth a.c. bridge circuit is used to eliminate the effect of

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Q185

How can be resolution of a wire-wound potentiometer be improved?

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Q186

A Q-meter is supplied with an oscillator having a 500 mV output voltage. While testing an unknown inductor, the voltage across the variable capacitor of the Q-meter, measured by a digital voltmeter, is obtained as 10 V. The Q-factor of the inductor is

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Q187

The following type of instrument can be used for measuring AC voltage of the highest frequency with reasonable accuracy.

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Q188

PMMC ammeter have uniform scale because

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Q189

Heating effect of current is used in

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Q190

Optical pyrometer is generally used to measure:

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Q191

Which one of the following has a magnetic brake?

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Q192

Use of high permeability core in moving iron instrument helps in

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Q193

For the voltmeter, if meter movement is from 0-12 mA, then what will be its sensitivity?

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Q194

A vector voltmeter can be used to measure
1. Complex insertion loss
2. Two-port network parameters
3. Amplifier gain and phase shift
4. Harmonic distortion
Which of the above are correct?

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Q195

The phenomenon of creeping occurs in

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Q196

A compensated wattmeter has its reading corrected for error due to which one of the following parameters?

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Q197

Consider the following statements in respect of two types of a dynamometer wattmeter connections are shown below the figure (a) and figure (b).
1. Figure (a) is used when applied voltage is high and load current flowing is low.
2. Figure (b) is used when applied voltage is low and load current flowing is high.
3. If the order of connections in Statements 1 and 2 are in opposite order, gross error will be increased.
4. If the order of connections in Statements 1 and 2 are in opposite order, gross error will be reduced.
Which of the statements given above are correct?
Measurement and Instrumentation mcq question image

Measurement and Instrumentation mcq question image

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Q198

Identify the correct matches:

List-I	List-II
a. Spirometer	1. Electric activity of heart
b. Sphygmomanometer	2. Respiratory volume measurement
c. Plethysmograph	3. Measurement of change in volume of body part
d. Electrocardiograph	4. Blood pressure measurement

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Q199

For the measurement of electrical energy, we may use a

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Q200

Match List-I with List-II and select the correct answer using the options given below:

List-I (Transducer)	List-II (Measured Quantity)
a. Hall Effect pick-up	1. Pressure
b. Piezoelectric pick-up	2. Velocity of a fluid
c. Hot-wire anemometer	3. Flow rate
d. Rotameter	4. Current

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