RCDD 12th Edition Chapter 1
questions n answers graded A+
Elementary knowledge of transmission = - correct answer ✔✔Electronics, electrical concepts,
volts, AMP's and ohm's.
An electrical conductor is = - correct answer ✔✔Any material that can carry a electric charge
from one point to another.
Common conductors are = - correct answer ✔✔Copper, Copper-covered steel, High strength
alloys, Aluminum.
Silver and gold are good conductors BUT = - correct answer ✔✔Cost too much.
Annealed copper = - correct answer ✔✔100%
Alloying = - correct answer ✔✔Adverse effect
corrosion resistance = - correct answer ✔✔High-strength alloys = poor
Oxidation resistance = - correct answer ✔✔Aluminum = poor
Advantages of solid conductors = - correct answer ✔✔- Less costly -[less complex termination
systems]
- Better transmission performance at high frequencies.
,Advantages of stranded conductors = - correct answer ✔✔- More flexible -[Longer flex life]
- Less susceptible to damage during crimp termination process.
Not advantage of stranded = - correct answer ✔✔Better transmission
AWG = - correct answer ✔✔Accepted in North America
AWG in power distribution = - correct answer ✔✔World wide
Insulation/dielectric used to isolate current by preventing direct contact between = - correct
answer ✔✔- Conductors
- A conductor and its environment
Lower dielectric constant and dissipation factor = - correct answer ✔✔Have better transmission
performance including lower attenuation characteristics and lower capacitance
PVC = - correct answer ✔✔Indoor
PE = - correct answer ✔✔Outdoor
Teflon = - correct answer ✔✔Du Pont
FEP = - correct answer ✔✔Fluorinated ethylene propylene
FEP Dielectric constant = - correct answer ✔✔2.1
FEP Dissipation Factor = - correct answer ✔✔0.0005
, Dielectric strength = - correct answer ✔✔Measures maximum voltage
Dissipation factor = - correct answer ✔✔The relative power loss in the insulation due to
molecular excitement and subsequent kinetic and thermal energy loss
Insulation resistance (IR) = - correct answer ✔✔The insulation's ability to resist the flow of
current through it.
Insulation resistance (IR) = - correct answer ✔✔For inside conductors, IR is typically expressed
in mega ohm- Kilometer(Km) or mega ohm 1000(ft)
Twisted pair = - correct answer ✔✔Minimizes cross talk
Pair to pair capacitance = - correct answer ✔✔Electric field
Mutual field = - correct answer ✔✔Magnetic field coupling
Twisted pair = - correct answer ✔✔Counter clockwise
Voice twist = - correct answer ✔✔2-6(inch)
Data twist = - correct answer ✔✔.50(inch) Cat5e & 6
Copper temperature = - correct answer ✔✔68F
Shields = - correct answer ✔✔Many types
questions n answers graded A+
Elementary knowledge of transmission = - correct answer ✔✔Electronics, electrical concepts,
volts, AMP's and ohm's.
An electrical conductor is = - correct answer ✔✔Any material that can carry a electric charge
from one point to another.
Common conductors are = - correct answer ✔✔Copper, Copper-covered steel, High strength
alloys, Aluminum.
Silver and gold are good conductors BUT = - correct answer ✔✔Cost too much.
Annealed copper = - correct answer ✔✔100%
Alloying = - correct answer ✔✔Adverse effect
corrosion resistance = - correct answer ✔✔High-strength alloys = poor
Oxidation resistance = - correct answer ✔✔Aluminum = poor
Advantages of solid conductors = - correct answer ✔✔- Less costly -[less complex termination
systems]
- Better transmission performance at high frequencies.
,Advantages of stranded conductors = - correct answer ✔✔- More flexible -[Longer flex life]
- Less susceptible to damage during crimp termination process.
Not advantage of stranded = - correct answer ✔✔Better transmission
AWG = - correct answer ✔✔Accepted in North America
AWG in power distribution = - correct answer ✔✔World wide
Insulation/dielectric used to isolate current by preventing direct contact between = - correct
answer ✔✔- Conductors
- A conductor and its environment
Lower dielectric constant and dissipation factor = - correct answer ✔✔Have better transmission
performance including lower attenuation characteristics and lower capacitance
PVC = - correct answer ✔✔Indoor
PE = - correct answer ✔✔Outdoor
Teflon = - correct answer ✔✔Du Pont
FEP = - correct answer ✔✔Fluorinated ethylene propylene
FEP Dielectric constant = - correct answer ✔✔2.1
FEP Dissipation Factor = - correct answer ✔✔0.0005
, Dielectric strength = - correct answer ✔✔Measures maximum voltage
Dissipation factor = - correct answer ✔✔The relative power loss in the insulation due to
molecular excitement and subsequent kinetic and thermal energy loss
Insulation resistance (IR) = - correct answer ✔✔The insulation's ability to resist the flow of
current through it.
Insulation resistance (IR) = - correct answer ✔✔For inside conductors, IR is typically expressed
in mega ohm- Kilometer(Km) or mega ohm 1000(ft)
Twisted pair = - correct answer ✔✔Minimizes cross talk
Pair to pair capacitance = - correct answer ✔✔Electric field
Mutual field = - correct answer ✔✔Magnetic field coupling
Twisted pair = - correct answer ✔✔Counter clockwise
Voice twist = - correct answer ✔✔2-6(inch)
Data twist = - correct answer ✔✔.50(inch) Cat5e & 6
Copper temperature = - correct answer ✔✔68F
Shields = - correct answer ✔✔Many types
