ATT FC Comp Test Exam With 100% Correct Answers 2023
Electrical Shock - Correct Answer-Sensation and muscular spasm cause when electric current passes through the body
Voltage - Correct Answer-Potential of electric energy; pressure of electrons pushing away from each other
current - Correct Answer-A flow of electric charge.
Factors affecting shock - Correct Answer-Amount of current, path of current, amount of body resistance, length of time current flows in body
Ways to prevent shock (3) - Correct Answer-Isolate, insulate & ground
Minimum AC current required to cause severe muscle contractions - Correct Answer-12
mA
How much more DC is required to freeze the body rather than AC - Correct Answer-5 times more
Types of burns - Correct Answer-Electrical burns, arc burns, thermal contact burns
Electrical burns - Correct Answer-Electrical current flowing through tissue or bones
Arc burns - Correct Answer-Electrical current flowing through tissue or bones
thermal contact burns - Correct Answer-When skin comes in contact with hot surfaces of overheated electrical conductors
Factors of electrical accidents - Correct Answer-1. Unsafe equipment 2. Unsafe environment 3.unsafe work practices
50 V
600+ V
grounding color - Correct Answer-Must be guarded against accidental contact
Made with metal enclosed equipment or enclosed in a vault or area with lock
green/green yellow/white/grey
switches
types - Correct Answer-min R when closed, max when open
toggle, slide, rotary, and push button single or double pole and throw
protection devices - Correct Answer-fuse (not reusable) and circuit breakers (reusable)
fuse: fast action ,1sec. Or slow blow 1-30secs
cot breaker: magnetic or thermal
Schematic Diagrams: C, D, Q, S, T, TP, AVC - Correct Answer-Capacitor, Diode, Transmitter, Switch, Transformer, Test Point, Automatic Volume Control
voltage drop - Correct Answer-the difference in voltage across an electrical device that has current flowing through it
Vdrop=I*R#
applied voltage - Correct Answer-sum of all voltage drops in ckt
TS steps - Correct Answer-A)Analyze ckt
B)Check Setup
C)Calc/measure values
D)Check Results
Faults in series - Correct Answer-Open, Short, Changed value
Series Parallel TS Open - Correct Answer-Tcurrent decreases on parallel and series
Drop also increases bc more Rtotal
Series Parallel TS
Short - Correct Answer-I increases in series short
in parallel the total R decreases, I increases in series component. Drop in parallel are now 0 because I takes path of least R.
measure all with ohmmeter
TS procedures - Correct Answer-logical and systematical
Basic Wiring and Connector TS - Correct Answer-Cable and connector labeling
Describe how to make continuity checks of shielded and unshielded cables
three characteristics needed for sine wave - Correct Answer-frequency, period, wavelength
wavelength - Correct Answer-actual distance between beginning and end of cycle (lamda)
induction - Correct Answer-generation of AC I by changing magnetic field (flux)
when a conductor passes through a magnetic field
Electrical Shock - Correct Answer-Sensation and muscular spasm cause when electric current passes through the body
Voltage - Correct Answer-Potential of electric energy; pressure of electrons pushing away from each other
current - Correct Answer-A flow of electric charge.
Factors affecting shock - Correct Answer-Amount of current, path of current, amount of body resistance, length of time current flows in body
Ways to prevent shock (3) - Correct Answer-Isolate, insulate & ground
Minimum AC current required to cause severe muscle contractions - Correct Answer-12
mA
How much more DC is required to freeze the body rather than AC - Correct Answer-5 times more
Types of burns - Correct Answer-Electrical burns, arc burns, thermal contact burns
Electrical burns - Correct Answer-Electrical current flowing through tissue or bones
Arc burns - Correct Answer-Electrical current flowing through tissue or bones
thermal contact burns - Correct Answer-When skin comes in contact with hot surfaces of overheated electrical conductors
Factors of electrical accidents - Correct Answer-1. Unsafe equipment 2. Unsafe environment 3.unsafe work practices
50 V
600+ V
grounding color - Correct Answer-Must be guarded against accidental contact
Made with metal enclosed equipment or enclosed in a vault or area with lock
green/green yellow/white/grey
switches
types - Correct Answer-min R when closed, max when open
toggle, slide, rotary, and push button single or double pole and throw
protection devices - Correct Answer-fuse (not reusable) and circuit breakers (reusable)
fuse: fast action ,1sec. Or slow blow 1-30secs
cot breaker: magnetic or thermal
Schematic Diagrams: C, D, Q, S, T, TP, AVC - Correct Answer-Capacitor, Diode, Transmitter, Switch, Transformer, Test Point, Automatic Volume Control
voltage drop - Correct Answer-the difference in voltage across an electrical device that has current flowing through it
Vdrop=I*R#
applied voltage - Correct Answer-sum of all voltage drops in ckt
TS steps - Correct Answer-A)Analyze ckt
B)Check Setup
C)Calc/measure values
D)Check Results
Faults in series - Correct Answer-Open, Short, Changed value
Series Parallel TS Open - Correct Answer-Tcurrent decreases on parallel and series
Drop also increases bc more Rtotal
Series Parallel TS
Short - Correct Answer-I increases in series short
in parallel the total R decreases, I increases in series component. Drop in parallel are now 0 because I takes path of least R.
measure all with ohmmeter
TS procedures - Correct Answer-logical and systematical
Basic Wiring and Connector TS - Correct Answer-Cable and connector labeling
Describe how to make continuity checks of shielded and unshielded cables
three characteristics needed for sine wave - Correct Answer-frequency, period, wavelength
wavelength - Correct Answer-actual distance between beginning and end of cycle (lamda)
induction - Correct Answer-generation of AC I by changing magnetic field (flux)
when a conductor passes through a magnetic field
