Measurement And Instrumentation MCQ Questions & Answers

71

A voltmeter having a sensitivity of 1000 Ω/V reads 100 V on its 150 V scale when connected across at resistor of unidentified specifications in series with a milliammeter. When the milliammeter reads 5 mA, the error due to the loading effect of the voltmeter will be nearly

A) 13% B) 18% C) 23% D) 33%

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

72

A digital displacement indicator based on a linear voltage differential transformer (LVDT) transducer and A/D conversion used a LVDT with a sensitivity of 1 mV/mm. If the smallest displacement to be measured is 0.1 mm and the maximum displacement of the LVDT core is 10 cm, then the digital display required for the instrument has to be

A) 2 digit type B) $$2\frac{1}{2}$$ digit type C) 3 digit type D) $$3\frac{1}{2}$$ digit type

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

73

The study of energy distribution across the frequency spectrum of a given electrical signal is done by a

A) Distortion meter B) Wave analyzer C) Spectrum analyzer D) Q-meter

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

74

The function of the dummy strain gauge, in measurement using two strain gauge, is to

A) increase the stability of measuring system B) Nullify the errors due to temperature i.e. thermal e.m.f C) Measure the straining both, x as well as y direction D) Increase the sensitivity of measuring system

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

75

Harmonic distortion analyzer

A) Measures the amplitude of each harmonic component B) Measures the rms value of fundamental frequency component C) Measures the rms value of all the harmonic component except the fundamental frequency component D) Displays rms value of each harmonic component of the screen of a CRO

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

76

The value of n for the n-bit A/D converter required to convert an analog input in the range of 0 to 5 volts to an accuracy of 10 mV is:

A) 8 B) 9 C) 7 D) 6

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

77

For the recording of very fast random signals, the most suitable instrument would be

A) dual-trace B) sampling oscilloscope C) real-time spectrum analyzer D) scanning-type spectrum analyzer

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

78

The sensitivity of a potentiometer can be increased by

A) Increasing the length of wire B) Decreasing the length of wire C) Increasing the current in the wire D) Decreasing the current in the wire

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

79

Consider the following types of digital voltmeters:
1. Ramp type
2. Dual slope integrating type
3. Integrating type using voltage to frequency conversion
4. Successive approximation type
5. Servo balanced potentiometer type
Which of these require a fixed reference voltage at the comparator stage?

A) 1 and 2 only B) 2, 4 and 5 only C) 2 and 3 only D) 1, 4 and 5 only

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

80

Q factor of Quartz . . . . . . . .

A) 20000 B) 10000 C) 30000 D) 50000

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Measurement And Instrumentation MCQ Questions & Answers | ECE