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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
Transients
transformer
Transistors
static electricty
2. 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
electrode
Generator off-line
Molded case circuit breakers (MCCBs)
3. An electrode where reduction occurs
Molded case circuit breakers (MCCBs)
cathode
charge
Diodes
4. 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
Potential transformers (PTs)
Isolated Phase Bus (IPB)
orbital
DC system is made up of 3 parts. What are they?
5. 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.
electric generator
A motor control center (MCC
Transients
General Design Criterion 17 (GDC-17)
6. Total Current entering a junction must equal current leaving a junction
7. 125 and 250 VDC.
Molded case circuit breakers (MCCBs)
Typical DC system voltage ratings used in NPPs
Transmission Substation
General Design Criterion 17 (GDC-17)
8. Used to convert mechanical energy to electrical energy coupled to the turbine shaft
Ohm's Law
Generator
Load center breakers
electricity
9. A material in which charge moves through easily
conductor
A motor control center (MCC
DC system is made up of 3 parts. What are they?
ion
10. 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.
Panelboard
Ohm's Law
Isolated Phase Bus (IPB)
closed circuit
11. A material that dissolves in water producing a solution that conducts electricity
Isolated Phase Bus (IPB)
DC system is made up of 3 parts. What are they?
electrolyte
reduced voltage
12. Voltage is stepped down again to serve smaller industrial and commercial customers as well as residential needs.
superconductor
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
PSB-1
Retail Substation
13. 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
Transistors
static electricty
protons
14. 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
Reactive Power
neutrons
Current transformers (CTs)
conductor
15. Temperature Controlled
Battery Rooms
Distribution System
Three Phase Power
Kirchoff's Voltage Law
16. A solid conductor through which a current enters or exits a medium
circuit
electrode
Typical DC system voltage ratings used in NPPs
General Design Criterion 17 (GDC-17)
17. Main Generator feeds main transformer - aux transformer (to aux loads) and crosstie to train B
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Real Power
closed circuit
Normal Operation
18. Is typically used for medium voltage applications where the 3 phase conductors can be mounted within the same enclosure.
DC
Non-segregated Phase Bus
Distribution System
Isolated Phase Bus (IPB)
19. 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
SR Sources of power
Transformer
Transients
Retail Lines
20. 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 -
electric generator
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
electrolyte
insulator
21. A circuit with a break in its path
open circuit
atom
superconductor
Retail Substation
22. Large battery - a battery charger - and a distribution panel
cathode
Real Power
SR Sources of power
DC system is made up of 3 parts. What are they?
23. The instantaneous movement from negatively charged atoms to positively charged atoms
static electricty
open circuit
Fault
Retail Lines
24. Analogous to a power plant switchyard but on the load end. Voltage is stepped down to Distribution System voltages.
charge
electricity
Transmission Substation
atom
25. Offsite power comes in via sartup transformer and some sites can backfeed power from grid via the main transformer OR even a crosstie
cathode
semiconductor
Generator off-line
closed circuit
26. The flow of electrons (-) through a material
DC
Typical DC system voltage ratings used in NPPs
Apparent Power
current electricity
27. 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
DC
High Voltage Lines
semiconductor
28. Operate somewhat like check valves such that current only flows in one direction - when the voltage on the input is higher than the output
Caution around DC Circuits
Diodes
DC
reduced voltage
29. A material that is usually insulated but becomes conductive through the addition of an impurity
Battery
semiconductor
circuit
Kirchoff's Voltage Law
30. Used in numerous applications to amplify or perform switching operations.
Transistors
SR Sources of power
electrolyte
electricity
31. Are used at low voltages rather than medium voltage and they contain CTs and protective devices as part of the assembly.
Load center breakers
Normal Operation
Reactive Power
Ohm's Law
32. Used to optimize power output. Multiply by root 3.
reduced voltage
Current transformers (CTs)
Three Phase Power
closed circuit
33. Significant impact on the capability of equipment to perform properly since the torque delivered by a motor is proportional to the voltage squared
Isolated Phase Bus (IPB)
reduced voltage
Current transformers (CTs)
Load center breakers
34. The source voltage is equal to the sum of the voltage drops across the elements of the circuit and the load.
35. Changes in voltage caused by motor starts or other loads being switched onto an electrical system
Transients
Non-segregated Phase Bus
Three Phase Power
Retail Substation
36. The product of voltage times current
Load center
conductor
Changes that need to be analyzed to determine impact on voltage - cable and breaker ratings - as well as battery capacity
Power
37. A material through which a charge does not move easily
Non-segregated Phase Bus
insulator
Panelboard
Potential transformers (PTs)
38. A fundamental quantity in electricity (+ or -)
orbital
electrolyte
Typical DC system voltage ratings used in NPPs
charge
39. Any path that electrons flow through
Disconnect switches
Fault
circuit
A motor control center (MCC
40. 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
Distribution System
conductor
Retail Substation
41. The flow of electrons
SR Sources of power
superconductor
Power
electricity
42. Is the vector sum of real and reactive power in an AC circuit and is measured in volt-amperes.
anode
protons
Apparent Power
electric generator
43. Positively charged particles of an atom
Switchgear
circuit
protons
Kirchoff's Voltage Law
44. 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
High Voltage Lines
DC system is made up of 3 parts. What are they?
ion
45. A voltage source that does not change polarity such as that delivered from a battery.
SR Sources of power
open circuit
DC
orbital
46. 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 ****
semiconductor
Fault
anode
Potential transformers (PTs)
47. V=IR.
48. Atoms that have acquired an electrical charge
ion
A motor control center (MCC
Non-segregated Phase Bus
Molded case circuit breakers (MCCBs)
49. 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.
Reactive Power
Transformer (smaller)
Caution around DC Circuits
Transmission Substation
50. An electrode where free electrons are produced
Distribution System
Three Phase Power
anode
circuit