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 full path of electrical current from a voltage source that passes completely from one terminal of the voltage source to another.






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






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






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






5. One thousandth of an inch.






6. A controller whose action is either fully on or off.






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






8. 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.






9. A meter used to measure units of volts.






10. ISA;






11. IEEE;






12. A variable resistor.






13. That part of a circuit which is physically interconnected.






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






15. The moving of electricity or heat through a conductor.






16. The power of one watt operating for one hour - and equal to 3 -600 joules.






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






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






19. Variable Frequency.






20. The part of a circuit that supplies power to the entire circuit or part of the circuit. Usually a separate unit that supplies power to a specific part of the circuit in a system.






21. The increase of the power level - current or voltage of a signal. In an amplifier it is the ratio of the output to the input signal levels.






22. A device that transfers power or energy from one system to another - such as taking a physical quality and changing it to an electrical signal.






23. The unit of power. One watt equals one joule per second - 1/746th horsepower.






24. The magnitude and time phase of a quantity - represented by a plotted line.






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






26. '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.






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






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






29. -459.67






30. The time delay between the output signal and the response time of the receiver of the signal.






31. Kwh; One thousand watt-hours.






32. Pounds per square inch differential. The difference in pressure between two points.






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






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






35. Resistance Temperature Detector.






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






37. Pounds per square inch absolute. Pressure commonly in reference to vacuum.






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






39. Current Consumption. The amount of amps or milliamps needed to maintain operation of a control or device.






40. Mm; One thousandth of a meter.






41. The voltage that is applied across a semiconductor junction to permit forward current through that junction and the device. Forward voltage is also known as 'bias.'






42. A three terminal semiconductor device. In a 'FET' the current is from source to drain because a conducting channel is formed by a voltage field between the gate and the source.






43. The form of radiation used to make non-contact temperature measurements. In the electromagnetic spectrum it is the area beyond red light from 760 nanometers to 1000 microns.






44. Inspection - analysis and action required to ensure quality of output.






45. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.






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






47. Radio Frequency Interference.






48. A material used to conduct electricity or heat.






49. An electrical resistor composed of semiconductor material - whose resistance is a known rapidly varying function of temperature.






50. LED; A solid state light source component that emits light or invisible infrared radiation.