This quiz covers key concepts of electromagnetic compatibility (EMC) and interference (EMI) within the context of the RCDD certification.
EMC
RF
EM
EMI
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Conducted (electric current)
Inductively coupled (magnetic field)
Capacittively coupled (electric field)
Radiated (electromagnetic field)
All of the above.
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A compurter interferes with frequency modulation (FM) radio reception.
The source of an electromagnetic phenomenon.
The receptor (e.g., or victim) that cannot function properly due to the electromagnetic phenomenon.
A path between them that allows the source to interfere with the rectptor.
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True
False
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True
False
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Input Signal lines.
Overhead lighting
Output signal lines
Electrical power cords
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Missing or inadequate enclosures.
Missing or inadequate device shielding.
Power cords running parallel with equipment cords.
Signal lines and proximity to radio frequency (RF) sources
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True
False
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True
False
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AM FM radio
Electostatic discharge
Oscillators.
Digital clocks
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True
False
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Yes
No
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2 V/m
3 V/m
4 V/m
5 V/m
Sometimes 10 V/m
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A coupling path between the interfering source and the susceptible unit.
Unbalanced signaling or poor dielectric strength
An interfering source
A suseptible unit
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Commercial and standby ac
Electrical service entrance
Environmental control Feeder distribution
Branch distribution and outlets
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True
False
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True
False
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Conversion (step up/down)
Distribution (insulatior, cabling, transformers, or grounding)
Generators
Cell phones
RF
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EMI (Electromagnetic interference)
EMC (Electromagnetic compatibility)
ESD (Electrostatic discharge)
EM (Electromagnetic)
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1 V/m
1 V/m being a moderate environment
3 V/m being a moderate environment
10 V/m
3 V/M
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1
2
3
10
5
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Common Mode (CD)
Current
Unwanted signal
Differential Mode (DM)
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Common Mode
Differential Mode
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True
False
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Corrupting transmitted signals on a balanced circuit.
Signal can become converted to a DM signal by the cable or equipment
Directly affect equipment operation (e.g., locking up a computer).
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Ture
False
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Physical separation between the electrical power and teleophone facilities.
Length of exposure.
Resistance fo the return path for the unbalanced current.
Signal injectors
Shielding effectiveness of the electrical power and telephone cables.
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True
False
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True
False
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True
False
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Electrical protection
Input signal lines
EM spectrum
Output signals
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Cellular phones
Electrical power cables
Rectifiers
Radio
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True
False
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True
False
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Volts
Amps
Volts per Amps V/a
Volts per meter V/m
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Unbalanced cabling
Incorrect or missing primary protectors
Incompatible secondary protectors
Incorrect or missing grounds
Incorrect or missing connections
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True
False
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Electrical power converters
Logic Circuits
Other Internal unwanted Signal
Electrical power line
Cabling
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Grounding electrode conductor
Grounding electrode
Building conductor for telecommunications
Telecommunications bonding backbone
The main grounding busbar
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Unbalanced EM fields of the electrical power system
Balanced DM field of the electrical power system
Coupling between the electrical power and telecommunications systems
The susceptibility of the telecommunications systems
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30db
20db
50db
60db
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Yes
No
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30 db
20 db
40 db
60 db
50 db
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AM to PM
DM to CM
CM to DM
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3.0 V
2.0 V
4.0 V
1.0 V
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Quiz Review Timeline (Updated): Mar 20, 2023 +
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