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Test your basic knowledge |
Electrical Engineering
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. Total Current entering a junction must equal current leaving a junction
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2. The flow of electrons
electricity
PSB-1
orbital
anode
3. An energy storage device that converts chemical energy to electricity when power is needed.
DC
electrolyte
superconductor
Battery
4. An electrode where free electrons are produced
Molded case circuit breakers (MCCBs)
DC
anode
charge
5. A material in which charge moves through easily
Switchgear
Transmission Substation
conductor
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
6. 125 and 250 VDC.
Potential transformers (PTs)
Typical DC system voltage ratings used in NPPs
Molded case circuit breakers (MCCBs)
Retail Lines
7. A fundamental quantity in electricity (+ or -)
atom
Ohm's Law
cathode
charge
8. Is a configuration used for very high current bus assemblies typically operating at generator voltage levels of 20 to 24 kV where each conductor is mounted within its own enclosure.
Generator off-line
Isolated Phase Bus (IPB)
Nuclear energy
electrode
9. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Retail Substation
Kirchoff's Current law
neutrons
Generator
10. Used in numerous applications to amplify or perform switching operations.
Molded case circuit breakers (MCCBs)
conductor
Transistors
semiconductor
11. Negatively charged particles of an atom
Fault
electrons
Distribution System
Load center
12. Similar to switchgear except for use in low voltage versus medium voltage applications. used to supply power to motor control centers and large individual low voltage motors in some applications.
electricity
Caution around DC Circuits
Load center
Panelboard
13. The power output from the plant is stepped up in voltage to match the grid voltage. Transformers that are used to provide offsite power to the plant (e.g. when the generator is off-line) step down the voltage.
Transformer
electric generator
Three Phase Power
superconductor
14. The flow of electrons (-) through a material
Disconnect switches
Non-segregated Phase Bus
current electricity
circuit
15. Used to isolate equipment but are typically not designed to be opened or closed while the circuit is energized (i.e. they're not designed to interrupt current). Also used in switchyard to isolate equipment
Load center
Disconnect switches
Three Phase Power
Caution around DC Circuits
16. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
Ohm's Law
Diodes
Transistors
reduced voltage
17. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
electric generator
Non-segregated Phase Bus
Normal Operation
Load center breakers
18. Positively charged particles of an atom
Retail Substation
protons
ion
Molded case circuit breakers (MCCBs)
19. Any path that electrons flow through
Battery
Load center
Distribution System
circuit
20. An electrode where reduction occurs
Battery Rooms
electricity
Retail Lines
cathode
21. Temperature Controlled
A motor control center (MCC
Transients
charge
Battery Rooms
22. A solid conductor through which a current enters or exits a medium
electrode
Load center breakers
Molded case circuit breakers (MCCBs)
Real Power
23. A condition where one or more phases have come into contact with ground or other phase(s) of the circuit - or the insulation separating them has been degraded. The current flow is only limited by the impedance between the source(s) and the ****
Potential transformers (PTs)
semiconductor
Fault
Molded case circuit breakers (MCCBs)
24. Used at low voltage levels (600 volts and below) to feed individual loads. These devices typically contain a thermal magnetic element which provides an inverse time tripping characteristic.
closed circuit
Circuit Breaker
PSB-1
Molded case circuit breakers (MCCBs)
25. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Load center breakers
Reactive Power
DC
Molded case circuit breakers (MCCBs)
26. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
DC system is made up of 3 parts. What are they?
static electricty
Power
Transients
27. A material that dissolves in water producing a solution that conducts electricity
conductor
Kirchoff's Current law
electrolyte
neutrons
28. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
Molded case circuit breakers (MCCBs)
Transients
Real Power
High Voltage Lines
29. Are used to supply power to smaller industrial and commercial users as well as residential customers. These lines can be compared to local roads such as the one in your local area or neighborhood - i.e. they're designed to handle the needs of local t
Transformer
open circuit
ion
Retail Lines
30. Requires - in part - that (1) electric power from the transmission network to the onsite distribution system shall be supplied by two physically independent circuits (not necessarily on separate rights of way) designed and located so as to minimize t
General Design Criterion 17 (GDC-17)
Retail Substation
Transients
Swtichyard
31. V=IR.
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32. A material that is usually insulated but becomes conductive through the addition of an impurity
Real Power
anode
Retail Lines
semiconductor
33. A device that changes mechanical energy into electricity
General Design Criterion 17 (GDC-17)
electric generator
conductor
Caution around DC Circuits
34. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.
Typical DC system voltage ratings used in NPPs
Transmission Substation
Isolated Phase Bus (IPB)
electrons
35. Power Systems Branch [Position] one required nuclear utilities to install degraded grid voltage relay schemes to preclude connecting safety related loads to the grid following an accident if grid voltage should be inadequate to support required opera
PSB-1
Transformer
Circuit Breaker
Panelboard
36. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
protons
High Voltage Lines
Distribution System
Load center breakers
37. If you are requesting service for new loads - or are making changes that affect the time when a load would operate or the amount of load -
DC system is made up of 3 parts. What are they?
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Typical DC system voltage ratings used in NPPs
DC
38. The instantaneous movement from negatively charged atoms to positively charged atoms
static electricty
Current transformers (CTs)
closed circuit
Transformer
39. One or more cells connected in series
Diodes
Generator
battery
conductor
40. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators
SR Sources of power
Apparent Power
A motor control center (MCC
Simple Circuite Contains?
41. Atoms that have acquired an electrical charge
Swtichyard
electrons
Battery
ion
42. Are used to provide low voltage circuits for use in metering - monitoring - and protective relaying applications. The turns ratio of the transformer determines the low voltage rating as a function of the system voltage - and is often selected to be 1
Potential transformers (PTs)
neutrons
Apparent Power
Non-segregated Phase Bus
43. Nuclear fuel is used to produce heat which is used to create steam. The steam is used to spin the turbine. The turbine shaft is connected to the generator rotor. The mechanical energy is converted to electrical energy through the generator.
Fault
Nuclear energy
electric generator
anode
44. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
DC
Retail Lines
Transformer (smaller)
General Design Criterion 17 (GDC-17)
45. A mechanical switching device used to either enable or interrupt current flow in a circuit. Typically provides both overload and fault protection. Is similar to a fuse; however - can be reset and reused.
Disconnect switches
Circuit Breaker
Current transformers (CTs)
Battery Rooms
46. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
atom
Ohm's Law
superconductor
Retail Lines
47. An assembly of circuit breakers typically used to supply power to large motors and medium or low voltage transformers within the auxiliary power system. Each breaker is contained in a separate cubicle along with associated current transformers - and
battery
Transmission Substation
Switchgear
semiconductor
48. Changes the voltage of electricity so that it can be transferred over long distances
superconductor
Isolated Phase Bus (IPB)
transformer
insulator
49. A circuit with a complete path - which allows for charges to move
insulator
DC
closed circuit
Swtichyard
50. An assembly of low voltage circuit breakers and/or starters used to supply individual loads of small to moderate sizes. Each feeder circuit is typically contained in a separate compartment or bucket.
Retail Lines
A motor control center (MCC
Three Phase Power
SR Sources of power