Performance Parameters of Digital Voltmeters

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Performance Parameters of Digital Voltmeters”.

1. Basic range of DVM is _________
a) 1 or 10 V
b) 0.1 or 1 V
c) 10 or 100 V
d) 100 or 1000 V

2. Accuracy of a DVM is ________
a) low
b) high
c) medium
d) zero

3. Input impedance of a DVM is ________
a) low
b) zero
c) high
d) medium

4. In DVM the common mode rejection noise is eliminated by ________
a) increasing the signal amplitude
b) making use of a resistance
c) using a transformer
d) guarding

5. Output of DVM needs ________
a) 4 lines
b) 2 lines
c) 8 lines
d) 16 lines

6. Normal mode noise can be eliminated through ________
a) attenuation
b) filtering
c) amplification
d) a transformer

7. DVM has ________
a) 1-3 digits
b) 2-5 digits
c) 3-6 digits
d) 7-10 digits

8. What is a digitizing circuit?
a) converts digital signal to analog
b) boosts the magnitude of a digital signal
c) attenuates a digital signal
d) converts analog signal to digital

9. User must wait for a stable reading.
a) True
b) False

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