Electronic Energy Meter, Adjustments in Single Phase Energy meters MCQ’s

Electrical Measurements Electronics & Communication Engineering

This set of Electrical Measurements Multiple Choice Questions & Answers (MCQs) focuses on “Electronic Energy Meter, Adjustments in Single Phase Energy meters”.

1. Measurement of energy involves _________
a) inductance and capacitance measurement
b) power consumption and time duration
c) resistance measurement and voltage drop
d) current consumption and voltage drop

2. Average power is _________
a) product of voltage and current
b) product of average current and voltage
c) product of instantaneous voltage and current
d) product of absolute voltage and current

3. An electronic energy meter makes use of ___________
a) IC
b) Transformer
c) CRO
d) Multimeter

4. What is the role of a multiplier?
a) it multiplies the voltage and current
b) divides the alternating voltage and current
c) supplies instantaneous voltage and current
d) multiplies alternating voltage and current

5. Analog signal is converted _________
a) into oscillations
b) into digital
c) into pulses
d) into current

6. Frequency of oscillation in an electronic energy meter depends on __________
a) output current of multiplier
b) output voltage of multiplier
c) output power of multiplier
d) input resistance of multiplier

7. An electronic energy meter is advantageous compared to conventional ones.
a) True
b) False

8. Creeping in an energy meter can be found using _________
a) creep adjustment
b) preliminary light load adjustment
c) full load u.p.f adjustment
d) light load adjustment

9. Full load u.p.f adjustment involves _________
a) adjusting the loads at unity power factor
b) applying rated voltage to pressure coil and a p.f. of unity for current coil
c) only applying rated voltage to pressure coil
d) only a p.f. of unity for the current coil

10. Energy meter can be directly used in measurement.
a) True
b) False

11. Preliminary light load adjustment involves _________
a) applying rated voltage across current coil
b) making use of a light load
c) applying rated voltage across pressure coil
d) adjusting the light load

12. Light load adjustment involves _________
a) applying rated voltage across the pressure coil
b) adjusting a light load
c) applying rated current across the transformer
d) applying rated voltage across the current coil

13. Creep adjustment involves _________
a) adjusting the creep
b) exciting the current coil
c) adjusting the turns ratio
d) exciting the pressure coil

14. Low power factor adjustment involves _________
a) adjusting the power factor at lower loads
b) applying rated voltage to pressure coil and a p.f. of 0.5 for current coil
c) only applying rated voltage to pressure coil
d) only a p.f. of 0.5 for the current coil

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