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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. Total Current entering a junction must equal current leaving a junction
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2. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
PSB-1
Kirchoff's Current law
Generator off-line
3. 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
reduced voltage
Reactive Power
Nuclear energy
electrolyte
4. The product of voltage times current
circuit
Kirchoff's Current law
General Design Criterion 17 (GDC-17)
Power
5. The flow of electrons
Ohm's Law
Current
atom
electricity
6. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Isolated Phase Bus (IPB)
Potential transformers (PTs)
Typical DC system voltage ratings used in NPPs
Load center breakers
7. A device that changes mechanical energy into electricity
Apparent Power
Circuit Breaker
Transmission Substation
electric generator
8. Neutral charged particles of an atom
neutrons
atom
Ohm's Law
conductor
9. 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.
protons
Transformer
Molded case circuit breakers (MCCBs)
Caution around DC Circuits
10. 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
conductor
Panelboard
Swtichyard
Retail Lines
11. 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
Battery Rooms
A motor control center (MCC
Retail Lines
Retail Substation
12. 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
Current transformers (CTs)
Battery Rooms
electrode
Generator off-line
13. Voltage Source - Conductor - Switch - Load
Simple Circuite Contains?
Typical DC system voltage ratings used in NPPs
Current
electrode
14. A material that is usually insulated but becomes conductive through the addition of an impurity
semiconductor
Retail Lines
Reactive Power
electric generator
15. A solid conductor through which a current enters or exits a medium
Load center breakers
electrode
anode
atom
16. A circuit with a break in its path
Generator
General Design Criterion 17 (GDC-17)
Apparent Power
open circuit
17. An electrode where free electrons are produced
Apparent Power
Distribution System
electric generator
anode
18. A material that has no resistance to electrical current - this usually occurs near absolute zero
battery
superconductor
DC system is made up of 3 parts. What are they?
Current transformers (CTs)
19. An electrode where reduction occurs
anode
cathode
SR Sources of power
Typical DC system voltage ratings used in NPPs
20. 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.
Power
Transformer (smaller)
Retail Lines
Isolated Phase Bus (IPB)
21. Used to optimize power output. Multiply by root 3.
Three Phase Power
Simple Circuite Contains?
DC system is made up of 3 parts. What are they?
Molded case circuit breakers (MCCBs)
22. Any path that electrons flow through
circuit
atom
Battery
charge
23. An energy storage device that converts chemical energy to electricity when power is needed.
orbital
Load center breakers
Panelboard
Battery
24. A fundamental quantity in electricity (+ or -)
Current
reduced voltage
charge
Kirchoff's Voltage Law
25. May be used to power various low voltage loads and are typically used for applications that do not require any form of remote control.
conductor
Panelboard
Non-segregated Phase Bus
Transients
26. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
closed circuit
electric generator
Real Power
Potential transformers (PTs)
27. 125 and 250 VDC.
Typical DC system voltage ratings used in NPPs
atom
protons
electric generator
28. 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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29. Positively charged particles of an atom
Battery Rooms
protons
Current transformers (CTs)
Nuclear energy
30. 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
Current transformers (CTs)
Switchgear
Load center breakers
Panelboard
31. One or more cells connected in series
battery
Nuclear energy
orbital
SR Sources of power
32. Changes the voltage of electricity so that it can be transferred over long distances
ion
transformer
PSB-1
Generator off-line
33. Used in numerous applications to amplify or perform switching operations.
ion
Transistors
Diodes
conductor
34. 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.
Nuclear energy
Diodes
reduced voltage
Molded case circuit breakers (MCCBs)
35. Atoms that have acquired an electrical charge
Retail Substation
electrons
Transmission Substation
ion
36. (analogous to flow) predominantly flows on the surface of the conductor.
Ohm's Law
Transformer (smaller)
Simple Circuite Contains?
Current
37. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
conductor
General Design Criterion 17 (GDC-17)
Non-segregated Phase Bus
Current transformers (CTs)
38. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B
Retail Lines
Normal Operation
charge
battery
39. A material through which a charge does not move easily
Real Power
electrolyte
A motor control center (MCC
insulator
40. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
ion
insulator
Transients
electrolyte
41. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
Apparent Power
Potential transformers (PTs)
PSB-1
Retail Substation
42. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Transients
Distribution System
Generator
reduced voltage
43. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators
open circuit
electrolyte
SR Sources of power
Current
44. 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
Switchgear
High Voltage Lines
battery
45. 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.
Generator
ion
Distribution System
transformer
46. A voltage source that does not change polarity such as that delivered from a battery.
current electricity
DC
Transmission Substation
Normal Operation
47. The path of an electron in an atom or molecule
Caution around DC Circuits
Isolated Phase Bus (IPB)
orbital
Normal Operation
48. Negatively charged particles of an atom
Transistors
electrons
reduced voltage
Swtichyard
49. 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 ****
battery
A motor control center (MCC
Transmission Substation
Fault
50. 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.
Distribution System
electric generator
Battery Rooms
A motor control center (MCC