Electrical Theory 1 Final Study Guide
Questions & Answers 100% Correct!!
To read low currents, its okay to wrap wire around the jaws of an ammeter to multiply reading? -
ANSWERYes
What does Kirchhoff's voltage law state? - ANSWERThe sum of the voltage drops, in a series circuit, is
equal to the applied voltage.
Draw a Wye or Star configured three phase transformer with a 480 volt line. - ANSWER
What does the acronym "ELI" stand for? - ANSWERThat voltage leads current
If you have a 40 VA transformer with a 24 volt secondary, what size fuse is needed to protect it? -
ANSWER
A Delta wound motor line current is _________ times greater than phase current. - ANSWER1.732
Which single phase motor is considered the most efficient? - ANSWERPSC Motor
State the law of charges: - ANSWERLike charges repel each other, and opposite charges attract each
other
State the first law of thermodynamics: - ANSWER#1. Energy is neither created nor destroyed, only
converted from one form to another.
Solve the winding notation on the back side. (R-C-S) - ANSWER
What is the 360 degree rule? - ANSWERWhen pulling wire through a conduit, you cannot exceed 4 90
degree bends or wire wont pull. Must add a pull box in order to keep pulling.
Give examples of pure resisitive loads: - ANSWER#1. Crank Case Heater
, #2. Strip Heater
True or False: When replacing an electrical component the circuit should always be isolated and
locked out. - ANSWERTrue
Draw a parallel circuit with 120 volts of pressure and 20,75,10, and 16 ohm resistances. Then
calculate Rt, It, and Pt then show wattages and currents for each branch. - ANSWER
What would happen to overall resistance in a parallel circuit, if one of the resistors was removed? -
ANSWERThe resistance would increase
Which single phase motor produces the most torque? - ANSWERCapacitor Start, Capacitor Run
How many degrees out of phase with each other are voltages of a three phase system? -
ANSWER120 Degrees
Name the three basic types of alternating current loads. - ANSWER#1. Resistive
#2. Inductive
#3. Capacitive
Draw a mag starter, show the coil, contacts, heaters, and overloads. - ANSWER
True or False: Voltage can assist in your death? - ANSWERTrue
List a motor type that uses ELI only - ANSWERSplit phase motor utilizing a centrifugal switch
Materials that make the best conductors generally contain how many valence electrons? - ANSWER1
or 2
Define the term watt. - ANSWERWattage is the measurement of the amount of power that is being
used in the circuit.
Questions & Answers 100% Correct!!
To read low currents, its okay to wrap wire around the jaws of an ammeter to multiply reading? -
ANSWERYes
What does Kirchhoff's voltage law state? - ANSWERThe sum of the voltage drops, in a series circuit, is
equal to the applied voltage.
Draw a Wye or Star configured three phase transformer with a 480 volt line. - ANSWER
What does the acronym "ELI" stand for? - ANSWERThat voltage leads current
If you have a 40 VA transformer with a 24 volt secondary, what size fuse is needed to protect it? -
ANSWER
A Delta wound motor line current is _________ times greater than phase current. - ANSWER1.732
Which single phase motor is considered the most efficient? - ANSWERPSC Motor
State the law of charges: - ANSWERLike charges repel each other, and opposite charges attract each
other
State the first law of thermodynamics: - ANSWER#1. Energy is neither created nor destroyed, only
converted from one form to another.
Solve the winding notation on the back side. (R-C-S) - ANSWER
What is the 360 degree rule? - ANSWERWhen pulling wire through a conduit, you cannot exceed 4 90
degree bends or wire wont pull. Must add a pull box in order to keep pulling.
Give examples of pure resisitive loads: - ANSWER#1. Crank Case Heater
, #2. Strip Heater
True or False: When replacing an electrical component the circuit should always be isolated and
locked out. - ANSWERTrue
Draw a parallel circuit with 120 volts of pressure and 20,75,10, and 16 ohm resistances. Then
calculate Rt, It, and Pt then show wattages and currents for each branch. - ANSWER
What would happen to overall resistance in a parallel circuit, if one of the resistors was removed? -
ANSWERThe resistance would increase
Which single phase motor produces the most torque? - ANSWERCapacitor Start, Capacitor Run
How many degrees out of phase with each other are voltages of a three phase system? -
ANSWER120 Degrees
Name the three basic types of alternating current loads. - ANSWER#1. Resistive
#2. Inductive
#3. Capacitive
Draw a mag starter, show the coil, contacts, heaters, and overloads. - ANSWER
True or False: Voltage can assist in your death? - ANSWERTrue
List a motor type that uses ELI only - ANSWERSplit phase motor utilizing a centrifugal switch
Materials that make the best conductors generally contain how many valence electrons? - ANSWER1
or 2
Define the term watt. - ANSWERWattage is the measurement of the amount of power that is being
used in the circuit.
