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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. 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
semiconductor
Battery
Disconnect switches
SR Sources of power
2. 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
Nuclear energy
Retail Lines
Typical DC system voltage ratings used in NPPs
General Design Criterion 17 (GDC-17)
3. The flow of electrons
Load center breakers
electricity
Switchgear
Real Power
4. An energy storage device that converts chemical energy to electricity when power is needed.
Molded case circuit breakers (MCCBs)
Panelboard
Battery
Power
5. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
Apparent Power
Battery
reduced voltage
Diodes
6. 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
electrolyte
Circuit Breaker
electrons
7. A voltage source that does not change polarity such as that delivered from a battery.
Three Phase Power
open circuit
Transformer (smaller)
DC
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.
Isolated Phase Bus (IPB)
Circuit Breaker
General Design Criterion 17 (GDC-17)
Retail Lines
9. 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 ****
Ohm's Law
Power
Swtichyard
Fault
10. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
Circuit Breaker
Current
Apparent Power
Retail Substation
11. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators
Normal Operation
Current transformers (CTs)
neutrons
SR Sources of power
12. Changes the voltage of electricity so that it can be transferred over long distances
Swtichyard
Transmission Substation
transformer
electrode
13. Positively charged particles of an atom
semiconductor
Swtichyard
protons
battery
14. Neutral charged particles of an atom
Kirchoff's Current law
charge
neutrons
Non-segregated Phase Bus
15. 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 -
Diodes
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
electricity
Switchgear
16. Large battery - a battery charger - and a distribution panel
electrons
Transients
DC system is made up of 3 parts. What are they?
Kirchoff's Voltage Law
17. Total Current entering a junction must equal current leaving a junction
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18. 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.
Molded case circuit breakers (MCCBs)
anode
Caution around DC Circuits
Nuclear energy
19. A fundamental quantity in electricity (+ or -)
neutrons
charge
Reactive Power
cathode
20. The path of an electron in an atom or molecule
Apparent Power
orbital
Generator
Real Power
21. Voltage Source - Conductor - Switch - Load
Current transformers (CTs)
reduced voltage
Simple Circuite Contains?
Distribution System
22. An electrode where free electrons are produced
A motor control center (MCC
anode
Kirchoff's Voltage Law
Non-segregated Phase Bus
23. A circuit with a complete path - which allows for charges to move
Non-segregated Phase Bus
closed circuit
Battery
neutrons
24. 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
Switchgear
conductor
Load center breakers
anode
25. Used to optimize power output. Multiply by root 3.
semiconductor
anode
neutrons
Three Phase Power
26. A material in which charge moves through easily
semiconductor
conductor
electrode
Battery Rooms
27. A material that is usually insulated but becomes conductive through the addition of an impurity
ion
semiconductor
Circuit Breaker
Generator off-line
28. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Swtichyard
Load center breakers
General Design Criterion 17 (GDC-17)
atom
29. Atoms that have acquired an electrical charge
Swtichyard
SR Sources of power
Molded case circuit breakers (MCCBs)
ion
30. The product of voltage times current
Power
Transistors
ion
electrode
31. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
Kirchoff's Voltage Law
atom
neutrons
Simple Circuite Contains?
32. Any path that electrons flow through
Load center
circuit
battery
Three Phase Power
33. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
Non-segregated Phase Bus
anode
Switchgear
Transients
34. 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)
protons
Battery Rooms
electric generator
35. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
Retail Lines
orbital
cathode
High Voltage Lines
36. 125 and 250 VDC.
neutrons
battery
Apparent Power
Typical DC system voltage ratings used in NPPs
37. A material that dissolves in water producing a solution that conducts electricity
Current
semiconductor
electrolyte
Non-segregated Phase Bus
38. (analogous to flow) predominantly flows on the surface of the conductor.
Generator off-line
Current
current electricity
Swtichyard
39. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
Real Power
Reactive Power
Generator off-line
PSB-1
40. 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
Reactive Power
Simple Circuite Contains?
Battery Rooms
Retail Lines
41. The flow of electrons (-) through a material
current electricity
Non-segregated Phase Bus
Battery Rooms
Transients
42. Temperature Controlled
insulator
Battery Rooms
Potential transformers (PTs)
Transformer
43. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
electrolyte
Transformer (smaller)
Typical DC system voltage ratings used in NPPs
cathode
44. A material through which a charge does not move easily
cathode
Panelboard
insulator
semiconductor
45. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
cathode
orbital
A motor control center (MCC
reduced voltage
46. A solid conductor through which a current enters or exits a medium
PSB-1
Retail Lines
electrolyte
electrode
47. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B
Isolated Phase Bus (IPB)
semiconductor
Panelboard
Normal Operation
48. One or more cells connected in series
battery
Transistors
PSB-1
Molded case circuit breakers (MCCBs)
49. Used in numerous applications to amplify or perform switching operations.
Simple Circuite Contains?
Transistors
open circuit
Load center breakers
50. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
Swtichyard
transformer
DC system is made up of 3 parts. What are they?
Generator off-line