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