RCDD 12th Edition Chapter 1 Exam
2025 Questions and Answers
Elementry knowledge of transmission = - ANSWER✔✔-Electronics, electrical concepts,
volts, AMP's and ohm's.
An electrical conductor is = - ANSWER✔✔-Any material that can carry a electric charge
from one point to another.
Common conductors are = - ANSWER✔✔-Copper, Copper-covered steel, High strength
alloys, Aluminum.
Silver and gold are good conductors BUT = - ANSWER✔✔-Cost too much.
Annealed copper = - ANSWER✔✔-100%
Alloying = - ANSWER✔✔-Adverse effect
corrosion resistance = - ANSWER✔✔-High-strength alloys = poor
Oxidation resistance = - ANSWER✔✔-Aluminum = poor
,Advantages of solid conductors = - ANSWER✔✔-- Less costly -[less complex
termination systems]
- Better transmission performance at high frequencies.
Advantages of stranded conductors = - ANSWER✔✔-- More flexible -[Longer flex life]
- Less susceptible to damage during crimp termination process.
Not advantage of stranded = - ANSWER✔✔-Better transmission
AWG = - ANSWER✔✔-Accepted in North America
AWG in power distribution = - ANSWER✔✔-World wide
Insulation/dielectric used to isolate current by preventing direct contact between = -
ANSWER✔✔-- Conductors
- A conductor and its environment
Lower dielectric constant and dissipation factor = - ANSWER✔✔-Have better
transmission performance including lower attenuation characteristics and lower
capacitance
PVC = - ANSWER✔✔-Indoor
PE = - ANSWER✔✔-Outdoor
Teflon = - ANSWER✔✔-Du Pont
, FEP = - ANSWER✔✔-Fluorinated ethylene propylene
FEP Dielectric constant = - ANSWER✔✔-2.1
FEP Dissipation Factor = - ANSWER✔✔-0.0005
Dielectric strength = - ANSWER✔✔-Measures maximum voltage
Dissipation factor = - ANSWER✔✔-The relative power loss in the insulation due to
molecular excitement and subsequent kinetic and thermal energy loss
Insulation resistance (IR) = - ANSWER✔✔-The insulation's ability to resist the flow of
current through it.
Insulation resistance (IR) = - ANSWER✔✔-For inside conductors, IR is typically
expressed in mega ohm- Kilometer(Km) or mega ohm 1000(ft)
Twisted pair = - ANSWER✔✔-Minimizes cross talk
Pair to pair capacitance = - ANSWER✔✔-Electric field
Mutual field = - ANSWER✔✔-Magnetic field coupling
Twisted pair = - ANSWER✔✔-Counter clockwise
Voice twist = - ANSWER✔✔-2-6(inch)
Data twist = - ANSWER✔✔-.50(inch) Cat5e & 6
2025 Questions and Answers
Elementry knowledge of transmission = - ANSWER✔✔-Electronics, electrical concepts,
volts, AMP's and ohm's.
An electrical conductor is = - ANSWER✔✔-Any material that can carry a electric charge
from one point to another.
Common conductors are = - ANSWER✔✔-Copper, Copper-covered steel, High strength
alloys, Aluminum.
Silver and gold are good conductors BUT = - ANSWER✔✔-Cost too much.
Annealed copper = - ANSWER✔✔-100%
Alloying = - ANSWER✔✔-Adverse effect
corrosion resistance = - ANSWER✔✔-High-strength alloys = poor
Oxidation resistance = - ANSWER✔✔-Aluminum = poor
,Advantages of solid conductors = - ANSWER✔✔-- Less costly -[less complex
termination systems]
- Better transmission performance at high frequencies.
Advantages of stranded conductors = - ANSWER✔✔-- More flexible -[Longer flex life]
- Less susceptible to damage during crimp termination process.
Not advantage of stranded = - ANSWER✔✔-Better transmission
AWG = - ANSWER✔✔-Accepted in North America
AWG in power distribution = - ANSWER✔✔-World wide
Insulation/dielectric used to isolate current by preventing direct contact between = -
ANSWER✔✔-- Conductors
- A conductor and its environment
Lower dielectric constant and dissipation factor = - ANSWER✔✔-Have better
transmission performance including lower attenuation characteristics and lower
capacitance
PVC = - ANSWER✔✔-Indoor
PE = - ANSWER✔✔-Outdoor
Teflon = - ANSWER✔✔-Du Pont
, FEP = - ANSWER✔✔-Fluorinated ethylene propylene
FEP Dielectric constant = - ANSWER✔✔-2.1
FEP Dissipation Factor = - ANSWER✔✔-0.0005
Dielectric strength = - ANSWER✔✔-Measures maximum voltage
Dissipation factor = - ANSWER✔✔-The relative power loss in the insulation due to
molecular excitement and subsequent kinetic and thermal energy loss
Insulation resistance (IR) = - ANSWER✔✔-The insulation's ability to resist the flow of
current through it.
Insulation resistance (IR) = - ANSWER✔✔-For inside conductors, IR is typically
expressed in mega ohm- Kilometer(Km) or mega ohm 1000(ft)
Twisted pair = - ANSWER✔✔-Minimizes cross talk
Pair to pair capacitance = - ANSWER✔✔-Electric field
Mutual field = - ANSWER✔✔-Magnetic field coupling
Twisted pair = - ANSWER✔✔-Counter clockwise
Voice twist = - ANSWER✔✔-2-6(inch)
Data twist = - ANSWER✔✔-.50(inch) Cat5e & 6
