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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. 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.
Thyristor
Volt
Light Emitting Diode
Current
2. The moving of electricity or heat through a conductor.
Conduction
RTD
Watt
Grounded Conductor
3. Pounds per square inch gage. Pressure in relationship to the ambient air pressure>
Resistance
Quartziodine Lamp
Electricity
PSIG
4. 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.'
Factory Mutual
Thyristor
Forward Voltage
Open Circuit
5. A switching device used in switching high DC loads. It contains a small permanent magnet which deflects arc in order to quench it.
Quartz
Lag
Magnetic Blow-out Switch
National Fire Protection Association
6. Normally Closed.
Electron
Light Emitting Diode
Q-value
N.C.
7. 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.
Conductance
Bridge Rectifier
Thermocouple
Electric circuit
8. 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.
Lag
Anode
Power Supply
Hazardous Location
9. The electrical demand of a process. Load can be expressed or calculated as amps (current) - ohms (resistance) or watts (power).
Polarity
System International
N.O.
Load
10. A solid-state switching device for semiconductors to convert AC current in one of two directions controlled by an electrode.
Thyristor
Farad
Interface
PSIG
11. The output that is produced when one or more inputs are present.
Quark
System International
OR Logic
Thyristor
12. Pressure that is less than atmospheric pressure.
N.C.
VF
Vacuum
Direct Current
13. A process that is kept at a constant temperature.
Isothermal
PSID
International Electrotechnical Commission
Conductor
14. The basic of thermal energy. The work done by the force of one newton acting through a distance of one meter.
Intrinsically safe
Transient Protection
SCR
Joule
15. Volt-ohm Meter.
Cathode
Occupational Safety & Health Administration
VOM
Modulated Light Source Control
16. OSHA;
Electricity
Field cell
Occupational Safety & Health Administration
Triac
17. One millionth of a volt.
RFI
Electrolysis
Canadian Standards Administration
Microvolt
18. Symbol used to denote transmitter.
System International
Coulomb
XMTR
Kilovolt
19. 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.
Quasiparticle
Output
Power Dissipation
Transducer
20. ISA;
Instrument Society of America
Alternating Current
Coulomb
SCR
21. A form of silicone dioxide. Commonly used in the making of radio transmitters and heat resistant products.
National Electrical Code
I
Maximum Load Current
Quartz
22. A sudden and unwanted increase or decrease of supply voltage or current.
Voltage Drop
Mil
Transient
Efficiency
23. Also known as Hertz - it is the number of complete cycles of periodic waveform that occur during a time period of one second.
Quality Control
Maximum Operating Temperature
Ripple
Frequency
24. -459.67
Absolute Zero
Forward resistance
Voltage Drop
Field cell
25. A positive (+) electrode. The point where electrons exit from a device to the external electric circuit.
Occupational Safety & Health Administration
Joule
Anode
Kilowatt
26. 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.
Electron
Millivolt
Cycle
Light Emitting Diode
27. The behavior of charged particles and the steady motion of charge in magnetic and electric fields.
Phase Proportioning
Polarity
Electrokinetics
Actuator
28. The maximum temperature at which a device can be safely operated.
Magnetic Blow-out Switch
Maximum Operating Temperature
Thermocouple
VF
29. 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.
Quality Control
Modulated Light Source Control
Isothermal
Zener Effect
30. kV; One thousand volts.
Root Mean Square
Kilowatt Hour
Resistance
Kilovolt
31. An anode (+) or cathode (-) conductor on a device through which an electric current passes.
Amp
Relay
Electrode
Joule
32. Two dissimilar metals connected at a point - that produce an electrical current whose magnitude is dependent upon the temperature at the junction point.
Ohm
Chatter
OR Logic
Thermocouple
33. A circuit element or components that allows signals of certain frequencies to pass and blocks signals of other frequencies.
Magnetic Blow-out Switch
Rheostat
Output
Filter
34. The interaction of magnetism and electrical current.
Electrodynamic
Micron
Forward Voltage
Grounded
35. One thousandth of an inch.
Ohm
Electricity
Mil
Transducer
36. A negative (-) electrode. The point of entry of electrons into a device from an external circuit. The negative electrode of a semiconductor diode.
On/Off Controller
Phase Proportioning
Cathode
Hard Wired
37. The element inside a vacuum tube - incandescent lamp or other similar device.
Light Emitting Diode
Electrodynamic
System International
Filament
38. NEC: A set of regulations pertaining to electrical installation and design in the interest of the protection of life and property. The NEC is adopted by NFPA and approved by ANSI. It is the preferred standard of guidelines used by most electrical reg
National Electrical Code
Quark
Root Mean Square
Transient
39. The average temperature of a process.
Absolute Zero
Pulse
Mean Temperature
M
40. 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.
X ray
Response Time
Forward resistance
Underwriters Laboratories
41. The measure of the ability of a material or substance to carry electrical current.
UHF
Conduit
Mueller Bridge
Conductance
42. A switch in a controller that manually resets after exceeding the controllers limit.
Relay
Supply Current
Ohm
Manual Reset Switch
43. A controller whose action is either fully on or off.
Quantum
On/Off Controller
Light Emitting Diode
Load
44. Pounds per square inch absolute. Pressure commonly in reference to vacuum.
Magnetic Flux
PSIA
National Electrical Code
Current Proportioning
45. A circuit conductor that is grounded to become part of the electric circuit by design and intent.
Diode
Mueller Bridge
Grounded Conductor
Ampere
46. Non-conducting material used to isolate and/or insulate energized electrical components.
Transient Protection
Vacuum
National Electrical Manufacturers Association
Dilectric
47. Expressed in webers - it is the product of the average normal component of the magnetic intensity over a surface and the area of that surface.
Magnetic Flux
Amp
Watt
Ohm
48. Radio Frequency Interference.
RFI
Voltmeter
Electric circuit
Electrolysis
49. Electric current passing through an electrolyte which produces chemical changes in it.
Vacuum
Manual Reset Switch
Electrolysis
Canadian Standards Administration
50. RMS; AC voltage that equals DC voltage that will do the same amount of work. For an AC sine wave it is 0.707 x peak voltage.
Maximum Load Current
Root Mean Square
Ohmeter
National Electrical Manufacturers Association