ATT FC COMP TEST CORRECT ANSWERS
What three factors determine the severity of an electric shock? - correct answer 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 answer 50-150 milliamperes
How much more DC than AC does it take to freeze a body to a conductor? - correct
answer 5 times: 12 ma AC, 60 ma DC
What are three types of burns? - correct answer 1) Electrical, 2) Arc, 3) Thermal
Contact
What are three well-known examples of electrical protection devices - correct answer
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 answer water, foam
What are the 4 steps that should be taken in the case of an electrical fire? - correct
answer 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 answer left, right
What are the two methods to troubleshoot a circuit? - correct answer 1) trial and
error, 2) logical procedure
What are the four steps to troubleshooting a circuit? - correct answer 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 answer 1) infinite resistance, 2)
no circuit current, 3) measure applied voltage
What are three characteristics of a short? - correct answer 1) no resistance, 2)
increases circuit current, 3) measures 0 voltage
What are the three characteristics of a changed value? - correct answer 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 answer The sine wave
____ is determined by the number of cycles that occur in one second. - correct
answer Frequency
What is the basic unit of measurement for frequency? - correct answer the Hertz
(Hz)
____ is the length of time required to complete one cycle of an AC sine wave. -
correct answer Period
The symbol for period is ____? - correct answer T
Time is expressed as a ____. - correct answer decimal part of a second
The formula for period is ____. - correct answer T = 1 / f
____ is the distance from beginning to end of one complete cycle of an AC sine
wave. - correct answer Wavelength
The symbol for wavelength is ____. - correct answer λ (lambda)
Wavelength is expressed in ____ or ____. - correct answer meters or centimeters
, The formula for wavelength is ____. - correct answer λ = 300 x 10^6 / f - where f is
Hertz
A changed value component changes ____ and ____. - correct answer ZT, IT
A ____ eliminates the component from the circuit. - correct answer short
The purpose of a transformer is to ____. - correct answer transfer power
For transformers power in ___ power out. - correct answer always equals
The transformer schematic symbol uses two ____. - correct answer inductor symbols
What is the reference designator for a transformer? - correct answer T
In a transformer, the ____ receives the input voltage. - correct answer primary coil
In a transformer, the secondary coil receives the ____. - correct answer induced
voltage
Transformers operate on the principle of ____. - correct answer mutual inductance
____ transformers increase the applied voltage. - correct answer Step-up
____ transformers decrease the applied voltage. - correct answer Step-down
What is the turns ratio formula? - correct answer NP / NS - where N means number
of coils
What is the formula for the secondary voltage in a transformer? - correct answer VP /
VS = NP / NS
What is the formula for the secondary current in a transformer? - correct answer IS =
VS / RL
What is the formula for the secondary power in a transformer? - correct answer PS =
IS x VS
What is the formula for the primary power in a transformer? - correct answer PP =
PS
What is the formula for the primary current in a transformer? - correct answer IP =
PP / VP
What is the ratio relationship formula in a transformer? - correct answer NP / NS =
VP / VS = IS / IP
Open windings in transformers prevent ____. - correct answer current flow
Shorted windings in transformers provide a ____ path for current. - correct answer
low resistance
Shorts in a transformer's primary ____ secondary voltage. - correct answer increase
Shorts in a transformer's secondary ____ secondary voltage. - correct answer
decrease
Complete shorts in a transformer's primary ____ the input voltage. - correct answer
short out
Complete shorts in a transformer's secondary ____ secondary voltage. - correct
answer eliminate
____ quickly determine if a transformer if operating normally. - correct answer
Voltage measurements
The purpose of a junction diode is to ____. - correct answer allow current flow in one
direction only
When forward biased, the diode acts as a ____. - correct answer closed switch
The schematic symbol of the junction diode is an ____ and a ____. - correct answer
arrow, bar
In the schematic symbol of the junction diode, the ____ represents N and the ____
represents P. - correct answer bar, arrow
In a transistor, the amount of collector current is dependent on the ____. - correct
answer base bias voltage (base current)
What three factors determine the severity of an electric shock? - correct answer 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 answer 50-150 milliamperes
How much more DC than AC does it take to freeze a body to a conductor? - correct
answer 5 times: 12 ma AC, 60 ma DC
What are three types of burns? - correct answer 1) Electrical, 2) Arc, 3) Thermal
Contact
What are three well-known examples of electrical protection devices - correct answer
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 answer water, foam
What are the 4 steps that should be taken in the case of an electrical fire? - correct
answer 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 answer left, right
What are the two methods to troubleshoot a circuit? - correct answer 1) trial and
error, 2) logical procedure
What are the four steps to troubleshooting a circuit? - correct answer 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 answer 1) infinite resistance, 2)
no circuit current, 3) measure applied voltage
What are three characteristics of a short? - correct answer 1) no resistance, 2)
increases circuit current, 3) measures 0 voltage
What are the three characteristics of a changed value? - correct answer 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 answer The sine wave
____ is determined by the number of cycles that occur in one second. - correct
answer Frequency
What is the basic unit of measurement for frequency? - correct answer the Hertz
(Hz)
____ is the length of time required to complete one cycle of an AC sine wave. -
correct answer Period
The symbol for period is ____? - correct answer T
Time is expressed as a ____. - correct answer decimal part of a second
The formula for period is ____. - correct answer T = 1 / f
____ is the distance from beginning to end of one complete cycle of an AC sine
wave. - correct answer Wavelength
The symbol for wavelength is ____. - correct answer λ (lambda)
Wavelength is expressed in ____ or ____. - correct answer meters or centimeters
, The formula for wavelength is ____. - correct answer λ = 300 x 10^6 / f - where f is
Hertz
A changed value component changes ____ and ____. - correct answer ZT, IT
A ____ eliminates the component from the circuit. - correct answer short
The purpose of a transformer is to ____. - correct answer transfer power
For transformers power in ___ power out. - correct answer always equals
The transformer schematic symbol uses two ____. - correct answer inductor symbols
What is the reference designator for a transformer? - correct answer T
In a transformer, the ____ receives the input voltage. - correct answer primary coil
In a transformer, the secondary coil receives the ____. - correct answer induced
voltage
Transformers operate on the principle of ____. - correct answer mutual inductance
____ transformers increase the applied voltage. - correct answer Step-up
____ transformers decrease the applied voltage. - correct answer Step-down
What is the turns ratio formula? - correct answer NP / NS - where N means number
of coils
What is the formula for the secondary voltage in a transformer? - correct answer VP /
VS = NP / NS
What is the formula for the secondary current in a transformer? - correct answer IS =
VS / RL
What is the formula for the secondary power in a transformer? - correct answer PS =
IS x VS
What is the formula for the primary power in a transformer? - correct answer PP =
PS
What is the formula for the primary current in a transformer? - correct answer IP =
PP / VP
What is the ratio relationship formula in a transformer? - correct answer NP / NS =
VP / VS = IS / IP
Open windings in transformers prevent ____. - correct answer current flow
Shorted windings in transformers provide a ____ path for current. - correct answer
low resistance
Shorts in a transformer's primary ____ secondary voltage. - correct answer increase
Shorts in a transformer's secondary ____ secondary voltage. - correct answer
decrease
Complete shorts in a transformer's primary ____ the input voltage. - correct answer
short out
Complete shorts in a transformer's secondary ____ secondary voltage. - correct
answer eliminate
____ quickly determine if a transformer if operating normally. - correct answer
Voltage measurements
The purpose of a junction diode is to ____. - correct answer allow current flow in one
direction only
When forward biased, the diode acts as a ____. - correct answer closed switch
The schematic symbol of the junction diode is an ____ and a ____. - correct answer
arrow, bar
In the schematic symbol of the junction diode, the ____ represents N and the ____
represents P. - correct answer bar, arrow
In a transistor, the amount of collector current is dependent on the ____. - correct
answer base bias voltage (base current)
