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Test your basic knowledge |
Electrical Components
Start Test
Study First
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. Non-conducting material used to isolate and/or insulate energized electrical components.
Thermoelectricity
Anode
Manual Reset Switch
Dilectric
2. 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.
Field-Effect Transistor (FET)
Capacitor
Vacuum
Response Time
3. The standard unit of magnetic flux.
Millimeter
Frequency
Capacitor
Weber
4. The act of the opening of an electrical circuit.
Milliamp
Ampere
Break
AWG
5. The average temperature of a process.
Series Circuit
Impedance
Mean Temperature
Grounding Conductor
6. A connected path to earth or to a conductive body that has a reference potential to earth.
Electron
Celsius
Grounded
Thermoelectricity
7. A process that is kept at a constant temperature.
Q-value
Watt-hour
Cycle Time
Isothermal
8. The amount of heat needed to convert one pound of water to one pound of steam. Latent heat is expressed in BTU per pound.
Relay
Electroduct
Proximity Switch
Latent heat
9. OSHA;
Proximity Switch
Grounded Conductor
Kilovolt
Occupational Safety & Health Administration
10. A device having two terminals and has a low resistance to electrical current in one direction and a high resistance in the other direction.
Occupational Safety & Health Administration
Diode
Efficiency
Actuator
11. MLS; A photoelectric control that operates on pulsed infrared radiation at a specific frequency - and responds only to that frequency of pulse. MLS is used frequently in areas where ambient light may cause problems with other types of sensors.
Proximity Switch
Triac
Electrode
Modulated Light Source Control
12. A variable resistor.
Kilovolt amperes
Ohmeter
Dilectric
Rheostat
13. A coil of wire wound about a magnetic material - such as iron - that produces a magnetic field when current flows through the wire.
SCR
Electrochemistry
Electromagnet
Transducer
14. The element inside a vacuum tube - incandescent lamp or other similar device.
Voltage Drop
Ohmeter
VHF
Filament
15. One millionth of a volt.
PID
Microvolt
Canadian Standards Administration
Supply Voltage
16. Voltage; The unit of electromotive force (EMF) that causes current to flow. One volt causes a current of one amp through a resistance of one ohm.
Volt
Ripple
Series Circuit
National Electrical Manufacturers Association
17. The moving of electricity or heat through a conductor.
PID
BTU
Conduction
Break
18. Variable Frequency.
Magnetic Blow-out Switch
VF
Forward resistance
Cycle
19. The mechanism of a switch which operates the contacts.
PID
Y
Maximum Load Current
Actuator
20. Kw; One thousand watts.
Momentary switch
Triac
Kilowatt
Ohmeter
21. A form of energy produced by the flow of particles of matter and consists of commonly attractive positively (protons [+]) and negatively (electrons [-]) charged atomic particles. A stream of electrons - or an electric current.
Electricity
Mil
Zener Diode
Transient
22. A material used to conduct electricity or heat.
Conductor
Kilowatt Hour
OR Logic
Alternating Current
23. Electric and magnetic force field that surrounds a moving electric charge.
Canadian Standards Administration
Watt-hour
Hard Wired
Electromagnetic field
24. A solid-state switching device used in switching AC wave forms.
Triac
Threshold Response
Thermocouple
Delta
25. That part of a circuit which is physically interconnected.
Electrodynamic
Kilowatt
Hard Wired
Flux
26. The unit of power. One watt equals one joule per second - 1/746th horsepower.
Diode
XMTR
Watt
Quantum Electronics
27. Inspection - analysis and action required to ensure quality of output.
Proximity Switch
Quality Control
Transient
Canadian Standards Administration
28. FM; ~LINK~
Factory Mutual
UHF
International Electrotechnical Commission
Threshold Response
29. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.
Field-Effect Transistor (FET)
Electrodynamic
International Electrotechnical Commission
Thyristor
30. The speed or time rate of change of displacement.
Velocity
Capacitor
National Electrical Code
Phase
31. 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.
Weber
Polarity
Watt
Pulse
32. The opposition to electrical flow.
Impedance
Modulated Light Source Control
Vacuum
Circuit
33. Radio Frequency Interference.
Kilowatt
Capacitor
Cathode
RFI
34. (DC); Electrical current that flows consistently in one direction only.
Occupational Safety & Health Administration
Supply Voltage
Quasiparticle
Direct Current
35. UL; ~LINK~
Proximity Switch
Underwriters Laboratories
Modulated Light Source Control
Millivolt
36. The standard that is used to make comparison measurements or calibrations.
Working Standard
Hazardous Location
Electricity
Rectifier
37. The rapid on/off cycling of a relay caused by improper signal or adjustment - faulty contacts - or other malfunction.
Chatter
Interface
Flux
SCR
38. Pounds per square inch differential. The difference in pressure between two points.
Latent heat
National Fire Protection Association
PSID
Hard Wired
39. 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.
Filter
Kilowatt
Power Supply
Pulse
40. A device used to store electrical energy in an electrostatic field until discharge.
Conductor
Capacitor
Maximum Power Rating
Proximity Switch
41. One of the very small discrete packets into which many forms of energy are subdivided.
CMV
Ripple
Quantum
Isothermal
42. Normally Closed.
Diode
N.C.
Potentiometer
Filter
43. A circuit which may have one or many resistors and/or other various devices connected in a series so that the current has only one path to follow.
National Fire Protection Association
Series Circuit
Microamp
Filament
44. Protective circuitry to guard against spikes that might be induced on the supply line.
Leakage current
Resistance
Transient Protection
Gain
45. The magnitude and time phase of a quantity - represented by a plotted line.
Vector
Electrolyte
National Fire Protection Association
Millimeter
46. A unit of electric charge. The amount of charge conveyed in one second by one ampere.
Transducer
Coulomb
I
Mean Temperature
47. The pronounced curvature in reverse voltage current that is characteristic of a diode.
Zener Effect
Charge
Chatter
Potentiometer
48. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.
Proximity Switch
Frequency
National Electrical Manufacturers Association
Modulated Light Source Control
49. An electrical circuit that is not 'made'. Contacts - switches or similar devices are open and preventing the floe of current.
Grounded Conductor
Kilovolt
Open Circuit
Voltage Drop
50. 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
OR Logic
International Brotherhood of Electrical Workers
Relay
Quartz