ATT FC COMP TEST || WITH COMPLETE ANSWERS.
What three factors determine the severity of an electric shock? correct answers 1) Amount of
current flowing through the body, 2) Path of current through the body, 3) Length of time the
body is in the circuit
How much current can be lethal? correct answers 50-150 milliamperes
How much more DC than AC does it take to freeze a body to a conductor? correct answers 5
times: 12 ma AC, 60 ma DC
What are three types of burns? correct answers 1) Electrical, 2) Arc, 3) Thermal Contact
What are three well-known examples of electrical protection devices correct answers 1) Fuse,
2) Circuit Breakers, 3) Ground-Fault Circuit Interrupters (GFCIs)
Never use ____ or ____ to extinguish an electrical fire because they are electrically
conductive substances. correct answers water, foam
What are the 4 steps that should be taken in the case of an electrical fire? correct answers 1)
de-energize, 2) call the fire department, 3) control / put out the fire, 4) report fire
Schematic diagrams are drawn so that the date or signal flows through the circuit from ____
to ____. correct answers left, right
What are the two methods to troubleshoot a circuit? correct answers 1) trial and error, 2)
logical procedure
What are the four steps to troubleshooting a circuit? correct answers 1) Analyze the circuit, 2)
Check the setup, 3) Calculate and measure values, 4) Check the results.
What are three characteristics of an open? correct answers 1) infinite resistance, 2) no circuit
current, 3) measure applied voltage
What are three characteristics of a short? correct answers 1) no resistance, 2) increases circuit
current, 3) measures 0 voltage
What are the three characteristics of a changed value? correct answers 1) resistance increases
or decreases, 2) increases or decreases circuit current, 3) measures voltage other than
calculated
What is a representation of AC voltage or current? correct answers The sine wave
____ is determined by the number of cycles that occur in one second. correct answers
Frequency
What is the basic unit of measurement for frequency? correct answers the Hertz (Hz)
____ is the length of time required to complete one cycle of an AC sine wave. correct
answers Period
, The symbol for period is ____? correct answers T
Time is expressed as a ____. correct answers decimal part of a second
The formula for period is ____. correct answers T = 1 / f
____ is the distance from beginning to end of one complete cycle of an AC sine wave. correct
answers Wavelength
The symbol for wavelength is ____. correct answers λ (lambda)
Wavelength is expressed in ____ or ____. correct answers meters or centimeters
The formula for wavelength is ____. correct answers λ = 300 x 10^6 / f - where f is Hertz
A changed value component changes ____ and ____. correct answers ZT, IT
A ____ eliminates the component from the circuit. correct answers short
The purpose of a transformer is to ____. correct answers transfer power
For transformers power in ___ power out. correct answers always equals
The transformer schematic symbol uses two ____. correct answers inductor symbols
What is the reference designator for a transformer? correct answers T
In a transformer, the ____ receives the input voltage. correct answers primary coil
In a transformer, the secondary coil receives the ____. correct answers induced voltage
Transformers operate on the principle of ____. correct answers mutual inductance
____ transformers increase the applied voltage. correct answers Step-up
____ transformers decrease the applied voltage. correct answers Step-down
What is the turns ratio formula? correct answers NP / NS - where N means number of coils
What is the formula for the secondary voltage in a transformer? correct answers VP / VS =
NP / NS
What is the formula for the secondary current in a transformer? correct answers IS = VS / RL
What is the formula for the secondary power in a transformer? correct answers PS = IS x VS
What is the formula for the primary power in a transformer? correct answers PP = PS
What is the formula for the primary current in a transformer? correct answers IP = PP / VP
What three factors determine the severity of an electric shock? correct answers 1) Amount of
current flowing through the body, 2) Path of current through the body, 3) Length of time the
body is in the circuit
How much current can be lethal? correct answers 50-150 milliamperes
How much more DC than AC does it take to freeze a body to a conductor? correct answers 5
times: 12 ma AC, 60 ma DC
What are three types of burns? correct answers 1) Electrical, 2) Arc, 3) Thermal Contact
What are three well-known examples of electrical protection devices correct answers 1) Fuse,
2) Circuit Breakers, 3) Ground-Fault Circuit Interrupters (GFCIs)
Never use ____ or ____ to extinguish an electrical fire because they are electrically
conductive substances. correct answers water, foam
What are the 4 steps that should be taken in the case of an electrical fire? correct answers 1)
de-energize, 2) call the fire department, 3) control / put out the fire, 4) report fire
Schematic diagrams are drawn so that the date or signal flows through the circuit from ____
to ____. correct answers left, right
What are the two methods to troubleshoot a circuit? correct answers 1) trial and error, 2)
logical procedure
What are the four steps to troubleshooting a circuit? correct answers 1) Analyze the circuit, 2)
Check the setup, 3) Calculate and measure values, 4) Check the results.
What are three characteristics of an open? correct answers 1) infinite resistance, 2) no circuit
current, 3) measure applied voltage
What are three characteristics of a short? correct answers 1) no resistance, 2) increases circuit
current, 3) measures 0 voltage
What are the three characteristics of a changed value? correct answers 1) resistance increases
or decreases, 2) increases or decreases circuit current, 3) measures voltage other than
calculated
What is a representation of AC voltage or current? correct answers The sine wave
____ is determined by the number of cycles that occur in one second. correct answers
Frequency
What is the basic unit of measurement for frequency? correct answers the Hertz (Hz)
____ is the length of time required to complete one cycle of an AC sine wave. correct
answers Period
, The symbol for period is ____? correct answers T
Time is expressed as a ____. correct answers decimal part of a second
The formula for period is ____. correct answers T = 1 / f
____ is the distance from beginning to end of one complete cycle of an AC sine wave. correct
answers Wavelength
The symbol for wavelength is ____. correct answers λ (lambda)
Wavelength is expressed in ____ or ____. correct answers meters or centimeters
The formula for wavelength is ____. correct answers λ = 300 x 10^6 / f - where f is Hertz
A changed value component changes ____ and ____. correct answers ZT, IT
A ____ eliminates the component from the circuit. correct answers short
The purpose of a transformer is to ____. correct answers transfer power
For transformers power in ___ power out. correct answers always equals
The transformer schematic symbol uses two ____. correct answers inductor symbols
What is the reference designator for a transformer? correct answers T
In a transformer, the ____ receives the input voltage. correct answers primary coil
In a transformer, the secondary coil receives the ____. correct answers induced voltage
Transformers operate on the principle of ____. correct answers mutual inductance
____ transformers increase the applied voltage. correct answers Step-up
____ transformers decrease the applied voltage. correct answers Step-down
What is the turns ratio formula? correct answers NP / NS - where N means number of coils
What is the formula for the secondary voltage in a transformer? correct answers VP / VS =
NP / NS
What is the formula for the secondary current in a transformer? correct answers IS = VS / RL
What is the formula for the secondary power in a transformer? correct answers PS = IS x VS
What is the formula for the primary power in a transformer? correct answers PP = PS
What is the formula for the primary current in a transformer? correct answers IP = PP / VP
