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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. A material that is usually insulated but becomes conductive through the addition of an impurity
semiconductor
Retail Substation
electrode
Isolated Phase Bus (IPB)
2. 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
DC
atom
Swtichyard
orbital
3. 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
Battery Rooms
Caution around DC Circuits
conductor
Disconnect switches
4. Atoms that have acquired an electrical charge
orbital
anode
High Voltage Lines
ion
5. The flow of electrons (-) through a material
current electricity
Simple Circuite Contains?
Transformer (smaller)
Potential transformers (PTs)
6. An electrode where free electrons are produced
semiconductor
Generator off-line
anode
Three Phase Power
7. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Transformer (smaller)
Load center breakers
PSB-1
superconductor
8. A voltage source that does not change polarity such as that delivered from a battery.
DC
charge
High Voltage Lines
insulator
9. Total Current entering a junction must equal current leaving a junction
10. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
electrode
Disconnect switches
High Voltage Lines
Switchgear
11. (analogous to flow) predominantly flows on the surface of the conductor.
electrons
Fault
Power
Current
12. 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 ****
Nuclear energy
Fault
battery
Power
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
electrolyte
atom
DC system is made up of 3 parts. What are they?
Switchgear
14. V=IR.
15. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
conductor
Normal Operation
semiconductor
Real Power
16. Neutral charged particles of an atom
neutrons
Simple Circuite Contains?
insulator
conductor
17. 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
Load center
Apparent Power
superconductor
Current transformers (CTs)
18. 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.
Load center
electrode
Current
Ohm's Law
19. The flow of electrons
electricity
A motor control center (MCC
Distribution System
Ohm's Law
20. Used to optimize power output. Multiply by root 3.
Three Phase Power
Typical DC system voltage ratings used in NPPs
battery
Transformer
21. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
Apparent Power
A motor control center (MCC
transformer
electrolyte
22. 125 and 250 VDC.
open circuit
Normal Operation
Typical DC system voltage ratings used in NPPs
reduced voltage
23. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
atom
Generator
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Caution around DC Circuits
24. 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
Transformer
Panelboard
Diodes
25. Positively charged particles of an atom
neutrons
Kirchoff's Current law
protons
electrode
26. One or more cells connected in series
orbital
protons
battery
Transmission Substation
27. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.
28. 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
Retail Lines
Battery
Caution around DC Circuits
29. 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
electrolyte
Current transformers (CTs)
Kirchoff's Voltage Law
General Design Criterion 17 (GDC-17)
30. The instantaneous movement from negatively charged atoms to positively charged atoms
Kirchoff's Current law
General Design Criterion 17 (GDC-17)
current electricity
static electricty
31. 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
Fault
circuit
32. The product of voltage times current
Power
Simple Circuite Contains?
Diodes
Typical DC system voltage ratings used in NPPs
33. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
Transformer (smaller)
Current
Load center
transformer
34. A circuit with a complete path - which allows for charges to move
closed circuit
electricity
Load center breakers
Real Power
35. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
Kirchoff's Current law
Ohm's Law
Transients
anode
36. A fundamental quantity in electricity (+ or -)
charge
Transformer (smaller)
General Design Criterion 17 (GDC-17)
Reactive Power
37. A solid conductor through which a current enters or exits a medium
Three Phase Power
Potential transformers (PTs)
Non-segregated Phase Bus
electrode
38. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
Transmission Substation
Non-segregated Phase Bus
Load center breakers
current electricity
39. 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
Battery
neutrons
Generator off-line
40. Large battery - a battery charger - and a distribution panel
Typical DC system voltage ratings used in NPPs
Transformer
DC system is made up of 3 parts. What are they?
General Design Criterion 17 (GDC-17)
41. 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)
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Circuit Breaker
conductor
42. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
reduced voltage
Kirchoff's Voltage Law
battery
protons
43. A material that dissolves in water producing a solution that conducts electricity
Current transformers (CTs)
orbital
electrolyte
transformer
44. 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
Transformer (smaller)
anode
Potential transformers (PTs)
conductor
45. Operate somewhat like check valves such that current only flows in one direction - when the voltage on the input is higher than the output
Transformer (smaller)
Diodes
circuit
static electricty
46. May be used to power various low voltage loads and are typically used for applications that do not require any form of remote control.
Three Phase Power
ion
Panelboard
superconductor
47. An electrode where reduction occurs
Fault
Generator off-line
Circuit Breaker
cathode
48. 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.
electrons
Molded case circuit breakers (MCCBs)
Retail Substation
Disconnect switches
49. Used in numerous applications to amplify or perform switching operations.
Retail Lines
Transistors
Generator
current electricity
50. A device that changes mechanical energy into electricity
Transformer (smaller)
electrons
Molded case circuit breakers (MCCBs)
electric generator