SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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 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.
Load center breakers
Molded case circuit breakers (MCCBs)
High Voltage Lines
Transformer
2. Building blocks of elements consisting of a positively charged nucleus surrounded by electrons
Isolated Phase Bus (IPB)
atom
DC
Fault
3. A circuit with a complete path - which allows for charges to move
circuit
neutrons
closed circuit
Ohm's Law
4. 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
semiconductor
Transmission Substation
Current transformers (CTs)
open circuit
5. A material that is usually insulated but becomes conductive through the addition of an impurity
Retail Substation
Battery
ion
semiconductor
6. An energy storage device that converts chemical energy to electricity when power is needed.
Normal Operation
Current transformers (CTs)
Battery Rooms
Battery
7. Large battery - a battery charger - and a distribution panel
DC system is made up of 3 parts. What are they?
Reactive Power
transformer
Disconnect switches
8. A voltage source that does not change polarity such as that delivered from a battery.
Generator off-line
electrons
Current
DC
9. 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.
Kirchoff's Voltage Law
Isolated Phase Bus (IPB)
Load center
Diodes
10. Temperature Controlled
ion
Ohm's Law
Battery Rooms
transformer
11. 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
Potential transformers (PTs)
Switchgear
Transmission Substation
12. A fundamental quantity in electricity (+ or -)
Switchgear
ion
neutrons
charge
13. 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.
Circuit Breaker
Current transformers (CTs)
closed circuit
Load center
14. 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
Transmission Substation
Transformer
Reactive Power
Three Phase Power
15. Voltage Source - Conductor - Switch - Load
Distribution System
Potential transformers (PTs)
Simple Circuite Contains?
Fault
16. Used to optimize power output. Multiply by root 3.
cathode
Three Phase Power
Apparent Power
neutrons
17. A circuit with a break in its path
Transformer
Circuit Breaker
open circuit
Molded case circuit breakers (MCCBs)
18. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
battery
neutrons
open circuit
Generator off-line
19. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.
conductor
Load center breakers
DC system is made up of 3 parts. What are they?
Transmission Substation
20. Positively charged particles of an atom
insulator
closed circuit
Disconnect switches
protons
21. A material in which charge moves through easily
Real Power
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
conductor
Panelboard
22. Unit's main generator - offsite power via the switchyard - and redundant emergency diesel generators
charge
open circuit
Power
SR Sources of power
23. 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
Kirchoff's Current law
Non-segregated Phase Bus
High Voltage Lines
Swtichyard
24. 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.
Current
DC
Circuit Breaker
Reactive Power
25. One or more cells connected in series
Transformer (smaller)
open circuit
battery
current electricity
26. 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.
DC
Caution around DC Circuits
Molded case circuit breakers (MCCBs)
current electricity
27. 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 -
Current transformers (CTs)
electrons
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
current electricity
28. 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.
SR Sources of power
Transformer (smaller)
neutrons
Distribution System
29. Is measured in watts and represents the power consumed by the resistive elements in an AC circuit
DC
orbital
Battery
Real Power
30. A solid conductor through which a current enters or exits a medium
Isolated Phase Bus (IPB)
Distribution System
superconductor
electrode
31. A material through which a charge does not move easily
insulator
Transistors
electrode
Isolated Phase Bus (IPB)
32. The flow of electrons
A motor control center (MCC
electricity
PSB-1
Apparent Power
33. Any path that electrons flow through
Transmission Substation
charge
Non-segregated Phase Bus
circuit
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
PSB-1
Power
A motor control center (MCC
Potential transformers (PTs)
35. Changes the voltage of electricity so that it can be transferred over long distances
Reactive Power
superconductor
Diodes
transformer
36. The product of voltage times current
Panelboard
semiconductor
Power
Potential transformers (PTs)
37. 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 ****
Diodes
ion
Circuit Breaker
Fault
38. The flow of electrons (-) through a material
superconductor
Retail Substation
Isolated Phase Bus (IPB)
current electricity
39. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.
40. A material that has no resistance to electrical current - this usually occurs near absolute zero
Current
circuit
superconductor
General Design Criterion 17 (GDC-17)
41. Atoms that have acquired an electrical charge
ion
General Design Criterion 17 (GDC-17)
anode
conductor
42. 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.
High Voltage Lines
protons
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
A motor control center (MCC
43. 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
DC system is made up of 3 parts. What are they?
General Design Criterion 17 (GDC-17)
electrons
Transients
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
Nuclear energy
superconductor
Ohm's Law
45. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Kirchoff's Current law
Generator
Apparent Power
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
46. Total Current entering a junction must equal current leaving a junction
47. 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
Kirchoff's Current law
High Voltage Lines
Caution around DC Circuits
PSB-1
48. 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.
A motor control center (MCC
Real Power
Nuclear energy
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
49. Used for transmission systems which are used for transporting bulk power from large generators to areas with heavy load concentrations such as cities.
Current transformers (CTs)
Fault
Panelboard
High Voltage Lines
50. 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.
semiconductor
Transistors
Transformer
Generator off-line