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