Electrical Engineering · Question Bank
Transmission Lines
97 of 168 questions match · page 4 of 5. Answer in your head first, then check the solution.
#61📘 EE Pocket Reviewer RojasEasy
What is a “guy wire”?
AA short piece of wire used for tying wires into the supporting insulators
BA wire use to connect the ground conductor to the ground plate buried under earth
CA short wire used to temporary connect transmission wires accidentally opened
DA wire used to support the poles
#62📘 EE Pocket Reviewer RojasEasy
The cross arms of a transmission line are made from what material?
#63📘 EE Pocket Reviewer RojasEasy
If the height of the transmission tower is increased, which of the following transmission parameters is likely to change?
AResistance of the line
BInductance of the line
CCapacitance of the line
DAll of these
#64📘 EE Pocket Reviewer RojasEasy
Which of the following will reduce the skin effect of a conductor?
AResistivity of the conductor material increases
BPermeability of the conductor material increases
CFrequency of the ac current increases
DCross sectional area of the conductor increases
#65📘 EE Pocket Reviewer RojasEasy
Which of the following are the composition of a low tension distribution system?
AFeeders, distributors and service mains
BFeeders, transformers and distributors
CTransmission lines, distributors and feeders
DTransmission lines, transformers and feeders
#66📘 EE Pocket Reviewer RojasEasy
What is the material generally used for the armor of high voltage cables?
AAluminum
BSteel
CBrass
DCopper
#67📘 EE Pocket Reviewer RojasEasy
Which distribution system is more reliable?
ARing main system
BRadial system
CTree system
DAll of these
#68📘 EE Pocket Reviewer RojasEasy
Which of the following materials is not used for transmission and distribution of electrical power?
ACopper
BAluminum
CSteel
DTungsten
#69📘 EE Pocket Reviewer RojasEasy
Which of the following is a benefit when transmission line conductors are transposed?
ATo prevent short circuit between any two line conductors
BTo prevent interference with neighboring telephone lines
CTo reduce copper loss
DTo reduce skin effect
#70📘 EE Pocket Reviewer RojasEasy
During typhoons, the live conductor of an electric supply lines may break down and will touch the ground. Which of the statements is true?
AThe supply voltage will reduce to zero
BNo current will flow in the conductor
CCurrent will flow to earth
DThe supply voltage will increase
#71📘 EE Pocket Reviewer RojasEasy
Overhead lines generally use what type of wires?
ACopper conductors
BACSR conductors
CAll aluminum conductors
DAny of these
#72📘 EE Pocket Reviewer RojasEasy
What is the current drawn by the line conductors due to corona losses?
ASinusoidal current
BNon-sinusoidal current
CTriangular current
DDirect current
#73📘 EE Pocket Reviewer RojasEasy
The topmost conductor in a high voltage transmission line is what conductor?
APhase-a conductor
BPhase-b conductor
CPhase-c conductor
DEarth conductor
#74📘 EE Pocket Reviewer RojasEasy
The occurrence of corona is highly possible in which of the following weather conditions?
ASummer
BHumid weather
CDry weather
DWinter
#75📘 EE Pocket Reviewer RojasEasy
What is the reason why the presence of ozone as a result of corona is harmful in a transmission line?
AIt will cause corrosion to the conductor
BIt will cause the power factor of the line to drop
CIt will cause to delay the transmission of power
DAll of these
#76📘 EE Pocket Reviewer RojasEasy
What do you call the conductors which connect the consumer’s terminals to the distribution lines?
AService mains
BFeeders
CBranch circuits
DDistributors
#77📘 EE Pocket Reviewer RojasEasy
In a power system, a three-phase, four wire system is commonly used where?
APrimary transmission
BSecondary transmission
CPrimary distribution
DSecondary distribution
#78📘 EE Pocket Reviewer RojasEasy
What do you call the phenomenon in which the current carried by a conductor is more on the surface than in the core?
ACorona effect
BResonance effect
CDoppler effect
DSkin effect
#79📘 EE Pocket Reviewer RojasEasy
To increase the capacity of a transmission line for transmitting power which of the following must be decreased?
ACapacitance
BLine inductance
CVoltage
DAll of these
#80📘 EE Pocket Reviewer RojasEasy
Which of the following materials are used in making ground wires?
AStainless steel
BGalvanized steel
CCast iron
DAluminum
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