Describe the electron theory
- correct answer That all matter , that is everything that occupies space and has weight is composed of
atoms
Define an electric current
- correct answer The flow of free electrons when a voltage is applied.
Define a conductor
- correct answer Material shaving many free electrons
Define a insulator
- correct answer Material having hardly free electrons
What are three examples of a good insulators
- correct answer Glass porcelain , rubber , paper , polyethylene and fiberglass
What is the unit of electric current
- correct answer When electricity flows in a wire
What instruments is used to measure electric current
- correct answer Anmeter
What is the unit of electric pressure
- correct answer voltage
Schematic diagram to illustrate instruments to a single phase motor
- correct answer
,What is the unit of electric power
- correct answer Watt
Registers watts or kilowatts and by reading it one can tell how much power any piece of apparatus is
consuming
- correct answer Wattmeter
What does the product of power and time equal
- correct answer energy
What sis the unit of resistance for wire
- correct answer Ohms
What is the formula for ohms law
- correct answer E = I x R
Define an alternating current
- correct answer A current to flow in one direction then alernate another way
What's the unit of an alternating current frequency
- correct answer 60hz
Define the power factor of an alternating current circuit
- correct answer the ratio of actual power to the product of volts times amp
Describe the theory of operation of an electric transformer
- correct answer will either step down or step up voltage for customer.
Describe a typical electric system , itemizing the major parts of the system
- correct answer Hydrolic , steam turbine ( fossil fired , Nuclear ) , combuetuon turbine , internal
combustion engine , georhermal, solar , wind, comoressed air
, What is a transmission line
- correct answer A set of conductors energized at voltages over 69,000 volts and transmitting large block
of electrical energy over relitivley long distances.
How do the voltage levels of a transmission and substation line compare
- correct answer When is a direct current transmission line used?
List of functions that can be accomplished in an electric substation
- correct answer Switch generators, equipment and circuits or lines in and out of the system Change AC
voltage levels. Change AC Current to DC Current or vice versa
Describe a typical distribution feeder circuit
- correct answer originate at the terminals of a circuit breaker or a circuit recloser in a distribution
substation
What is a primary circuit?
- correct answer all high voltage distribution circuits greater than 600 volts up to 34,500 volts
What is the purpose of the distribution transformer installed on an electric distribution circuit?
- correct answer To reduce the voltage of the primary circuit to the utilization voltage required to supply
the customer.
Describe an electric service
- correct answer Wires extending from the secondary, or distribution transformer, adjacent to the
customer's property to the customer's premises.
o Triplex, quadriplex, open buss.
What functions are accomplished in an electric substation?
- correct answer pg 68
What types of equipment can be found in a typical substation
- correct answer pg 69