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This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Measurements knowledge and support exam preparation. Choose a topic below to get started.
1. |
In some energy meters, creeping can be avoided by __________ |
A. | attaching small gold pieces |
B. | attaching small aluminium pieces |
C. | attaching small iron pieces |
D. | attaching small zinc pieces |
Answer» D. attaching small zinc pieces | |
2. |
Creeping is avoided by __________ |
A. | reversing the polarity of the voltage |
B. | drilling two diametrically opposite holes |
C. | holding the disc |
D. | increasing the friction |
Answer» C. holding the disc | |
3. |
IN_SOME_ENERGY_METERS,_CREEPING_CAN_BE_AVOIDED_BY___________?$ |
A. | attaching small gold pieces |
B. | attaching small aluminium pieces |
C. | attaching small iron pieces |
D. | attaching small zinc pieces |
Answer» D. attaching small zinc pieces | |
4. |
Creeping is avoided by _________? |
A. | reversing the polarity of the voltage |
B. | drilling two diametrically opposite holes |
C. | holding the disc |
D. | increasing the friction |
Answer» C. holding the disc | |
5. |
Disc rotates slowly in some energy meters. |
A. | True |
B. | False |
Answer» B. False | |
6. |
How can temperature effect be compensated in an energy meter? |
A. | through heat sinks |
B. | by a temperature shunt |
C. | by using resistance |
D. | by using a coolant |
Answer» C. by using resistance | |
7. |
How is the flux of shunt coil related to voltage? |
A. | flux is proportional to square of voltage |
B. | directly proportional |
C. | inversely proportional |
D. | independent of each other |
Answer» B. directly proportional | |
8. |
Supply voltage in an energy meter is __________ |
A. | constant always |
B. | zero always |
C. | depends on the load |
D. | can fluctuate |
Answer» E. | |
9. |
Energy meter creeps __________ |
A. | due to change in supply |
B. | due to reversal in polarity of voltage |
C. | due to asymmetry in magnetic circuit |
D. | due to turns ratio of transformer |
Answer» D. due to turns ratio of transformer | |
10. |
Phase angles in an energy meter cannot be incorrect. |
A. | True |
B. | False |
Answer» C. | |
11. |
Magnitude of flux in an energy meter varies __________ |
A. | due to abnormal currents and voltages |
B. | due to high resistance and inductance values |
C. | due to change in the transformer turns |
D. | due to the induced e.m.f in the windings |
Answer» B. due to high resistance and inductance values | |