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Test your basic knowledge |
Electrical Engineering
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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. 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.
Circuit Breaker
Typical DC system voltage ratings used in NPPs
A motor control center (MCC
Transmission Substation
2. Any path that electrons flow through
Transformer
Battery
electric generator
circuit
3. Large battery - a battery charger - and a distribution panel
orbital
Transmission Substation
Typical DC system voltage ratings used in NPPs
DC system is made up of 3 parts. What are they?
4. Positively charged particles of an atom
Kirchoff's Current law
protons
Diodes
electrode
5. One or more cells connected in series
battery
Diodes
Simple Circuite Contains?
Load center breakers
6. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Generator off-line
Reactive Power
Ohm's Law
Load center breakers
7. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B
Molded case circuit breakers (MCCBs)
SR Sources of power
protons
Normal Operation
8. 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
Swtichyard
Transformer (smaller)
Disconnect switches
PSB-1
9. A voltage source that does not change polarity such as that delivered from a battery.
orbital
Kirchoff's Current law
DC
battery
10. An electrode where free electrons are produced
Potential transformers (PTs)
anode
DC system is made up of 3 parts. What are they?
DC
11. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators
neutrons
Power
anode
SR Sources of power
12. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
anode
Battery Rooms
A motor control center (MCC
Generator off-line
13. Voltage Source - Conductor - Switch - Load
Transformer (smaller)
Simple Circuite Contains?
A motor control center (MCC
High Voltage Lines
14. Represents the power transferred to or from capacitive and inductive elements in an AC circuit and is measured in volt-amperes reactive. Voltage and current are 90
Kirchoff's Voltage Law
General Design Criterion 17 (GDC-17)
Reactive Power
superconductor
15. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
semiconductor
Potential transformers (PTs)
Kirchoff's Current law
Generator
16. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
Transmission Substation
Apparent Power
anode
Typical DC system voltage ratings used in NPPs
17. A material that has no resistance to electrical current - this usually occurs near absolute zero
DC
Non-segregated Phase Bus
superconductor
insulator
18. A material that is usually insulated but becomes conductive through the addition of an impurity
Simple Circuite Contains?
electricity
Transformer
semiconductor
19. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.
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20. The instantaneous movement from negatively charged atoms to positively charged atoms
static electricty
Distribution System
DC
Disconnect switches
21. 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.
Non-segregated Phase Bus
Isolated Phase Bus (IPB)
electric generator
Fault
22. 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
Retail Lines
DC
electricity
Non-segregated Phase Bus
23. 125 and 250 VDC.
conductor
Molded case circuit breakers (MCCBs)
Three Phase Power
Typical DC system voltage ratings used in NPPs
24. (analogous to flow) predominantly flows on the surface of the conductor.
electrolyte
Isolated Phase Bus (IPB)
Current transformers (CTs)
Current
25. Temperature Controlled
Simple Circuite Contains?
Disconnect switches
Kirchoff's Voltage Law
Battery Rooms
26. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
superconductor
Panelboard
Kirchoff's Voltage Law
reduced voltage
27. Used in numerous applications to amplify or perform switching operations.
Transistors
Kirchoff's Current law
Apparent Power
Power
28. protect your eyes and clothing. air must be circulated through the battery rooms with large stationary batteries to prevent a build-up of a combustible mixture.System cannot be grounded. First ground should do nothing.
Disconnect switches
Caution around DC Circuits
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Current
29. A circuit with a complete path - which allows for charges to move
conductor
insulator
Power
closed circuit
30. 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.
atom
Load center
Transients
electrolyte
31. V=IR.
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32. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
Kirchoff's Voltage Law
atom
electric generator
Retail Lines
33. 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.
Load center breakers
Transformer
current electricity
reduced voltage
34. An energy storage device that converts chemical energy to electricity when power is needed.
Molded case circuit breakers (MCCBs)
electrons
Battery
static electricty
35. A material through which a charge does not move easily
insulator
charge
Battery
General Design Criterion 17 (GDC-17)
36. An electrode where reduction occurs
High Voltage Lines
Circuit Breaker
Generator
cathode
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 -
Normal Operation
Transformer
circuit
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
38. 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.
Generator off-line
Molded case circuit breakers (MCCBs)
PSB-1
battery
39. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
Retail Lines
Transients
reduced voltage
DC
40. A material that dissolves in water producing a solution that conducts electricity
Apparent Power
Swtichyard
electrolyte
insulator
41. Total Current entering a junction must equal current leaving a junction
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42. A solid conductor through which a current enters or exits a medium
cathode
closed circuit
superconductor
electrode
43. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
Normal Operation
Swtichyard
Real Power
Molded case circuit breakers (MCCBs)
44. Used to optimize power output. Multiply by root 3.
Typical DC system voltage ratings used in NPPs
Three Phase Power
Load center breakers
Non-segregated Phase Bus
45. The flow of electrons (-) through a material
electrolyte
Fault
Disconnect switches
current electricity
46. 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
Retail Substation
electrode
PSB-1
neutrons
47. High voltage breakers and buses are arranged to allow power flow on the grid while isolating individual generators - transformers or transmission lines as needed. Power from the plant is delivered to the grid via the plant ****** - and the ******* se
General Design Criterion 17 (GDC-17)
Swtichyard
Kirchoff's Current law
electric generator
48. Used to supply power to large industrial and commercial facilities as well as the Retail System. lines can be compared to state highways and major roads around cities.
DC
Distribution System
Fault
Molded case circuit breakers (MCCBs)
49. The flow of electrons
Typical DC system voltage ratings used in NPPs
electrolyte
electricity
orbital
50. 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
ion
Switchgear
Circuit Breaker
open circuit
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