Kerala PSC Study Material: Electrical Engineering Questions and Answers


25 Electrical Engineering Questions and Answers





1. Electric power is typically measured in what units?
Ans : Watts





2. Electric current is measured using what device?
Ans: Ammeter





3. The unit of electric current is the........?
Ans: Ampere





4. What is the unit of electrical resistance?
Ans : The Ohm





5. How is power calculated?
Ans: Multiply current by voltage





6. In a ____________ the switch is closed and electric current flows from the source through the connection device.
Ans : Closed Circuit





7. This device is used to open and close a circuit?
Ans : Switch





8. What is the study of charges in motion?
Ans: Electrodynamics





9. Coal, hydroelectric, wind, nuclear, and solar thermal power plants all have this equipment in common.
Ans : Turbines





10. A battery is connected to a resistor. As charge flows, the chemical energy of the battery is dissipated as.........?
Ans: Thermal energy









11. Materials with lots of free electrons are called
Ans: Conductors





12. Electrons in the outer orbit are called........?
Ans : valences





13. The current in a given circuit is not to exceed 24 A. Which value of fuse is best?
Ans : 24 A





14. What does LED stand for?
Ans : Light Emitting Diode





15. The current requirement of a LED is.........?
Ans : Between 3 and 35mA





16. The ratio of the resistance of a 200W, 230V lamp to that of a 100W, 115V lamp will be.........?
Ans: 2





17.  If one cycle of ac waveform occurs every millisecond, the frequency will be.........?
Ans: 1000 Hz





18. The Q- factor of a coil is given by......?
Ans : Reciprocal of its power factor.





19. A battery is a source of..........?
Ans : DC Voltage





20. During charging, the electrolyte of a lead acid cell becomes?
Ans : Diluted.









21. The burning of fossil fuels does not release?
Ans: Potential energy





22. Geothermal energy is..............?
Ans: Generated in rocks below the Earth’s surface





23. Humans get their own energy from?
Ans : Foods





24. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current?
Ans: decreases





25. When the voltage across a capacitor is tripled, the stored charge
Ans : Triples


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