Test your basic knowledge |

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. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.






2. The range of temperature over which a device may be safely used. The temperature range which the device has been designed to operate.






3. Or Hertz; The measurement of the time period of one alternating electric current. In the United States this is commonly 60 cycles per second - or 60 Hertz.






4. A small current leaking from an output device in the off state caused by semiconductor characteristics.






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






6. UL; ~LINK~






7. The energy delivered by a circuit or device. The electrical signal produced by the input to the transducer.






8. A variable resistor.






9. One thousandth of an inch.






10. A rise and fall of voltage - current - or other faction that would be constant under normal conditions. A pulse that is intentionally induced will have a finite duration time.






11. Response to the change in the level of the input signal.






12. EPA; ~LINK~






13. An electromagnetic radiation produced when the inner satellite electrons of heavy atoms have been excited by collision with a stream of fast electrons return to their ground state - giving up the energy previously imparted to them.






14. The rate of transfer of energy.






15. The resistance to electrical current. Resistance is measured in ohms.






16. A device used to store electrical energy in an electrostatic field until discharge.






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






18. A region of space that surrounds a moving electrical charge or a magnetic pole - in which the electrical charge or magnetic pole experiences a force that is above the electrostatic ones associated with particles at rest.






19. The delayed period of time when outputs are turned off when power is initially applied.






20. Electric and magnetic force field that surrounds a moving electric charge.






21. Pressure that is less than atmospheric pressure.






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






23. A process that is kept at a constant temperature.






24. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.






25. The difference in potential measured between two points caused by resistance or impedance.






26. NFPA;






27. Applying molecular physics to electronics.






28. Resistance Temperature Detector.






29. The current that is gained by a transistor when it is connected in a common emitter circuit.






30. MA; One thousandth of an amp.






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






32. Symbol used to denote transformer.






33. 'Common Mode Voltage.' The voltage which is tolerable between signal and ground.






34. ISO;






35. The average temperature of a process.






36. The opposition to electrical flow.






37. Symbol for Mega - one million.






38. (ampere)The basic unit of current in an electrical circuit. One ampere is the rate of flow of electric current when one coulomb of charge flows past a point in the circuit in one second. Symbolically characterized by the letter 'I' and sometimes 'A'






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






40. OSHA;






41. Symbol used for wye configuration for three phase electrical connections.






42. Intensity. The commonly used symbol used to represent Amperes when used in formulas. I = Intensity = Current = Amps = Amperes.






43. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.






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






45. Radio Frequency Interference.






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






47. The adjustment of a display that results are zero on the display corresponding to a non-zero signal.






48. One millionth of an amp.






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






50. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.