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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. The path of an electron in an atom or molecule
electricity
Transformer
Power
orbital
2. 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 ****
Retail Lines
Transmission Substation
Circuit Breaker
Fault
3. 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
Load center
PSB-1
Generator off-line
open circuit
4. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
Current transformers (CTs)
Real Power
Circuit Breaker
atom
5. 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
Disconnect switches
electrons
Transients
anode
6. Used to optimize power output. Multiply by root 3.
Typical DC system voltage ratings used in NPPs
Three Phase Power
Disconnect switches
static electricty
7. 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.
Panelboard
Molded case circuit breakers (MCCBs)
orbital
Battery
8. 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.
Battery Rooms
Normal Operation
Current
Transformer
9. A device that changes mechanical energy into electricity
ion
electric generator
High Voltage Lines
Real Power
10. A material that has no resistance to electrical current - this usually occurs near absolute zero
superconductor
cathode
conductor
Transistors
11. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B
open circuit
Normal Operation
static electricty
circuit
12. Any path that electrons flow through
Normal Operation
Nuclear energy
circuit
Transformer
13. 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
protons
Caution around DC Circuits
Transformer
Switchgear
14. 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
Caution around DC Circuits
High Voltage Lines
transformer
General Design Criterion 17 (GDC-17)
15. An electrode where reduction occurs
DC system is made up of 3 parts. What are they?
electrolyte
cathode
orbital
16. A material through which a charge does not move easily
insulator
Current transformers (CTs)
Circuit Breaker
Retail Lines
17. Total Current entering a junction must equal current leaving a junction
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18. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Generator
DC system is made up of 3 parts. What are they?
Potential transformers (PTs)
Switchgear
19. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
charge
Power
reduced voltage
static electricty
20. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Switchgear
electrode
Load center breakers
Transformer (smaller)
21. The instantaneous movement from negatively charged atoms to positively charged atoms
Potential transformers (PTs)
static electricty
Normal Operation
superconductor
22. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
current electricity
Non-segregated Phase Bus
electric generator
General Design Criterion 17 (GDC-17)
23. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
PSB-1
Apparent Power
Transformer
Isolated Phase Bus (IPB)
24. Atoms that have acquired an electrical charge
Transmission Substation
orbital
electrons
ion
25. 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
Normal Operation
SR Sources of power
Caution around DC Circuits
26. An energy storage device that converts chemical energy to electricity when power is needed.
Battery
Diodes
reduced voltage
insulator
27. 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.
open circuit
A motor control center (MCC
Kirchoff's Current law
Distribution System
28. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
Nuclear energy
High Voltage Lines
atom
Transformer (smaller)
29. 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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30. The product of voltage times current
Power
circuit
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
SR Sources of power
31. 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
General Design Criterion 17 (GDC-17)
open circuit
Current transformers (CTs)
Transformer (smaller)
32. 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 -
Apparent Power
Diodes
Caution around DC Circuits
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
33. Changes the voltage of electricity so that it can be transferred over long distances
Transistors
DC
Nuclear energy
transformer
34. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
electrolyte
battery
Generator off-line
Non-segregated Phase Bus
35. 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
Nuclear energy
Transmission Substation
electric generator
36. 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
Real Power
charge
Reactive Power
current electricity
37. 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.
Retail Lines
Reactive Power
Circuit Breaker
Molded case circuit breakers (MCCBs)
38. Large battery - a battery charger - and a distribution panel
circuit
insulator
DC system is made up of 3 parts. What are they?
Normal Operation
39. An electrode where free electrons are produced
Retail Substation
Load center
electrolyte
anode
40. 125 and 250 VDC.
Potential transformers (PTs)
Switchgear
Typical DC system voltage ratings used in NPPs
Circuit Breaker
41. V=IR.
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42. A voltage source that does not change polarity such as that delivered from a battery.
DC
protons
current electricity
electric generator
43. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
Apparent Power
Load center breakers
Retail Substation
Battery Rooms
44. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
Switchgear
Transients
conductor
Distribution System
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
electrons
open circuit
SR Sources of power
Potential transformers (PTs)
46. A material in which charge moves through easily
SR Sources of power
Transients
Battery
conductor
47. A fundamental quantity in electricity (+ or -)
Reactive Power
charge
ion
Apparent Power
48. A solid conductor through which a current enters or exits a medium
Battery
PSB-1
electrode
Disconnect switches
49. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.
circuit
atom
charge
Transmission Substation
50. Positively charged particles of an atom
Switchgear
closed circuit
protons
ion