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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. 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
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Ohm's Law
Reactive Power
Molded case circuit breakers (MCCBs)
2. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
Circuit Breaker
conductor
atom
charge
3. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
Transformer
Fault
Apparent Power
Transients
4. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
High Voltage Lines
DC system is made up of 3 parts. What are they?
charge
Non-segregated Phase Bus
5. The flow of electrons
Current
Typical DC system voltage ratings used in NPPs
transformer
electricity
6. Are used to provide low current circuits for use in metering - monitoring - and protective relaying applications. The turns ratio determines the amount of current that will be available in the secondary as a function of the system current on the prim
Normal Operation
Current transformers (CTs)
electrons
DC
7. The instantaneous movement from negatively charged atoms to positively charged atoms
static electricty
Switchgear
Typical DC system voltage ratings used in NPPs
Current
8. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Transformer (smaller)
Retail Lines
Load center breakers
protons
9. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
Retail Substation
Generator off-line
Ohm's Law
Load center breakers
10. 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
PSB-1
electrolyte
neutrons
11. Voltage Source - Conductor - Switch - Load
Simple Circuite Contains?
superconductor
Normal Operation
PSB-1
12. Positively charged particles of an atom
DC
Isolated Phase Bus (IPB)
protons
ion
13. 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
reduced voltage
Disconnect switches
orbital
current electricity
14. Atoms that have acquired an electrical charge
transformer
Kirchoff's Current law
cathode
ion
15. Used to optimize power output. Multiply by root 3.
Non-segregated Phase Bus
General Design Criterion 17 (GDC-17)
Three Phase Power
Distribution System
16. One or more cells connected in series
Typical DC system voltage ratings used in NPPs
Generator off-line
battery
ion
17. Used in numerous applications to amplify or perform switching operations.
current electricity
Transistors
Disconnect switches
neutrons
18. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
Switchgear
Transients
Kirchoff's Current law
orbital
19. 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
Battery
neutrons
Load center
20. A material through which a charge does not move easily
insulator
Transients
Apparent Power
Molded case circuit breakers (MCCBs)
21. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
DC
Transformer (smaller)
Diodes
orbital
22. An energy storage device that converts chemical energy to electricity when power is needed.
semiconductor
Caution around DC Circuits
Battery
Kirchoff's Current law
23. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
Generator off-line
anode
Kirchoff's Current law
atom
24. (analogous to flow) predominantly flows on the surface of the conductor.
Current
ion
circuit
Caution around DC Circuits
25. The path of an electron in an atom or molecule
electrolyte
orbital
Panelboard
Potential transformers (PTs)
26. 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
orbital
Retail Lines
open circuit
Three Phase Power
27. A material that dissolves in water producing a solution that conducts electricity
electrolyte
High Voltage Lines
insulator
Kirchoff's Current law
28. Total Current entering a junction must equal current leaving a junction
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183
29. A circuit with a complete path - which allows for charges to move
electrode
closed circuit
Generator
Disconnect switches
30. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
Real Power
ion
Disconnect switches
Generator
31. A circuit with a break in its path
open circuit
Reactive Power
Panelboard
Simple Circuite Contains?
32. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Molded case circuit breakers (MCCBs)
Transformer (smaller)
Non-segregated Phase Bus
33. May be used to power various low voltage loads and are typically used for applications that do not require any form of remote control.
Panelboard
Kirchoff's Voltage Law
electrolyte
Molded case circuit breakers (MCCBs)
34. 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 ****
Transformer
A motor control center (MCC
Fault
charge
35. An electrode where reduction occurs
Typical DC system voltage ratings used in NPPs
electric generator
Load center
cathode
36. A voltage source that does not change polarity such as that delivered from a battery.
circuit
DC
Battery
Caution around DC Circuits
37. 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.
Reactive Power
Caution around DC Circuits
Transistors
reduced voltage
38. Any path that electrons flow through
Generator off-line
circuit
Non-segregated Phase Bus
Current
39. The flow of electrons (-) through a material
Molded case circuit breakers (MCCBs)
Retail Substation
Caution around DC Circuits
current electricity
40. A solid conductor through which a current enters or exits a medium
anode
Transistors
electrode
Apparent Power
41. Temperature Controlled
atom
High Voltage Lines
anode
Battery Rooms
42. 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
Swtichyard
ion
PSB-1
protons
43. V=IR.
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183
44. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.
charge
General Design Criterion 17 (GDC-17)
Generator
Transmission Substation
45. 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)
Current transformers (CTs)
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Load center breakers
46. 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.
A motor control center (MCC
current electricity
Current transformers (CTs)
DC
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
charge
Switchgear
Transmission Substation
Molded case circuit breakers (MCCBs)
48. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Current
Generator
anode
Normal Operation
49. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
Switchgear
semiconductor
electric generator
reduced voltage
50. 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.
Load center
neutrons
Reactive Power
Isolated Phase Bus (IPB)
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