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Electrical Components

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






2. The standard that is used to make comparison measurements or calibrations.






3. A switch in a controller that manually resets after exceeding the controllers limit.






4. An electrical circuit that increases the power - voltage or current of an applied signal.






5. Radio Frequency Interference.






6. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.






7. The pronounced curvature in reverse voltage current that is characteristic of a diode.






8. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.






9. A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts. A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens contacts to interrupt a circu






10. kV; One thousand volts.






11. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.






12. The act of the opening of an electrical circuit.






13. Applying molecular physics to electronics.






14. 'British Thermal Unit' - the amount of thermal energy required to raise one pound of water 1degree F. One BTU is equal to .293 watt hours. One kWh is equal to 3412 BTUs.






15. The mechanism of a switch which operates the contacts.






16. The interaction of magnetism and electrical current.






17. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.






18. The unit by which electrical resistance is measured. One ohm is equal to the current of one ampere which will flow when a voltage of one volt is applied






19. Silicone Controlled Rectifier.






20. Mm; One thousandth of a meter.






21. In a three phase connection all three phases are connected in series thus forming a closed circuit.






22. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).






23. NFPA;






24. The time it takes for a controller to complete one on/off cycle.






25. A connected path to earth or to a conductive body that has a reference potential to earth.






26. IBEW;






27. The maximum watts that a device can safely handle.






28. Kva; One thousand volt amps.






29. Normally Open.






30. A device incorporating semiconductor material and suitable contacts capable of performing electrical functions (such as voltage - current or power amplification) with low power requirements.






31. Protective circuitry to guard against spikes that might be induced on the supply line.






32. A panel meter with zero and span adjustments - commonly scaled for signals such as 1-5 volts - 4-20mA - etc.






33. An anode (+) or cathode (-) conductor on a device through which an electric current passes.






34. IEC;






35. One millionth of a meter.






36. A tube - pipe or trough that carries and protects electric wiring.






37. The time based relationship between a reference and a periodic function.






38. A unit of electrical current named after French physicist Andr






39. A variable resistor.






40. The element inside a vacuum tube - incandescent lamp or other similar device.






41. The method by which two devices or systems are connected and interact with each other.






42. MV; One thousandth of a volt. The difference in potential needed to cause a current of one milliampere flow through a resistance of one ohm.






43. The range of voltage needed to maintain operation of a control or device.






44. The unit for capacitance. A capacitor that stored one coulomb of charge with one volt across it will have a value of one farad.






45. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.






46. A silicone semiconductor that maintains a fixed voltage in a circuit.






47. A sudden and unwanted increase or decrease of supply voltage or current.






48. A full-wave rectifier where the diodes are connected in a bridge circuit. This allows the current to the load during both the positive and negative alternating of the supply voltage.






49. An ionized gas containing about equal numbers of positive and negative charges - which is a good conductor of electricity - and is affected by a magnetic field.






50. Non-conducting material used to isolate and/or insulate energized electrical components.






Can you answer 50 questions in 15 minutes?



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