Measurement And Instrumentation MCQ Questions & Answers

31

For accurate measurement of voltage the most suitable equipment

A) Analog Voltmeter B) Digital Voltmeter C) CRO D) None of these

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Answer & Solution

Answer: Option C

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32

A coil is tuned to response at 1 MHz with a resonating capacitance of 72 pF. At 500 kHz, the resonance is obtained with a resonating capacitance value of 360 pF. The self-capacitance of the coil is

A) 12 pF B) 24 pF C) 36 pF D) 72 pF

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Answer & Solution

Answer: Option B

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33

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

List-I (Characteristics)	List-II (ADCs)
a. Parallel comparator	1. Null balancing type
b. Successive approximation	2. Fastest converter
c. Dual-slope	3. Voltage dependent conversion time
d. Counter-ramp	4. Integrating type

A) a-2, b-1, c-3, d-4 B) a-2, b-1, c-4, d-3 C) a-1, b-2, c-4, d-3 D) a-1, b-2, c-3, d-4

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Answer & Solution

Answer: Option B

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34

The internal resistance of the milliammeter must be very low for

A) high accuracy B) high sensitivity C) minimum effect on the current in the circuit D) maximum voltage drop across the meter

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Answer & Solution

Answer: Option C

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35

Which of the following cannot provide as much time interval accuracy as the oscilloscope but can capture and display eight or more signals simultaneously, something that scopes cannot do?

A) Logic analyzer B) Digital oscilloscope C) Frequency analyzer D) Wave analyzer

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Answer & Solution

Answer: Option A

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36

The three impedances of an ac bridge shown in given figure are:
Z₁ = 200Ω∠60°, Z₂ = 400Ω∠-90°, Z₃ = 300Ω∠0°
The value of Z₄ for the bridge to be balanced is

A) 150Ω∠30° B) 400Ω∠90° C) 300Ω∠90° D) 600Ω∠-150°

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Answer & Solution

Answer: Option D

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37

In a linear variable differential transformer (LVDT).

A) all three windings have equal number of turns B) two secondary windings have equal number of turns C) the induced voltages in two secondaries are unequal D) the induced voltages in two secondaries are in phase

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Answer & Solution

Answer: Option C

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38

Electrical positional system telemetering uses for transmission of signal in

A) Two wires only B) Two or three wires only C) Two or three or four wires only D) Two or three four or even five wires

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Answer & Solution

Answer: Option D

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39

A potentiometer is basically a

A) deflectional type instrument B) null type instrument C) deflectional as well as null type instrument D) a digital instrument

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Answer & Solution

Answer: Option B

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40

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

List-I (Bridge)	List-II (Quantity)
a. Wheatstone bridge	1. Capacitance
b. Wien bridge	2. Very low resistance
c. Kelvin double bridge	3. Resistance
d. Schering bridge	4. Frequency

A) a-3, b-4, c-2, d-1 B) a-2, b-1, c-3, d-4 C) a-3, b-1, c-2, d-4 D) a-2, b-4, c-3, d-1

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Answer & Solution

Answer: Option A

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Measurement And Instrumentation MCQ Questions & Answers | ECE