What are the various kind of cables used for transmission?

What are the various kind of cables used for transmission?
by

1 Answer

Answer :

Cables, which are used for transmitting power, can be categorized in three forms:
• Low-tension cables, which can transmit voltage upto 1000 volts.
• High-tension cables can transmit voltage upto 23000 volts.
• Super tension cables can transmit voltage 66 kV to 132 kV.
by

Related questions

While starting a main propulsion synchronous motor, the ammeter pegs out at maximum and then returns to the proper value after synchronization. This indicates the _____________. A. motor has started properly B. field windings are grounded C. slip rings are dirty D. power transmission cables are grounded

Description : While starting a main propulsion synchronous motor, the ammeter pegs out at maximum and then returns to the proper value after synchronization. This indicates the _____________. A. motor has started ... field windings are grounded C. slip rings are dirty D. power transmission cables are grounded

Last Answer : Answer: A

ACSR (Aluminium Conductor Steel Reinforced) are used as (A) over head transmission lines. (B) super conductors. (C) fuse (D) underground cables.

Description : ACSR (Aluminium Conductor Steel Reinforced) are used as (A) over head transmission lines. (B) super conductors. (C) fuse (D) underground cables.

Last Answer : (A) over head transmission lines.

What resulted when various US government agencies and universities began linking computer systems together via cables and satellites in the 1970?

Description : What resulted when various US government agencies and universities began linking computer systems together via cables and satellites in the 1970?

Last Answer : It is known as the internet. The internet has been around longerthan you think. It actually started back in the 70s.

Which of the following uses cables to connect two or more computers? (a) Transmission (b) Unguided -Technology

Description : Which of the following uses cables to connect two or more computers? (a) Transmission (b) Unguided -Technology

Last Answer : (c) In guided media, signals are guided through cables.

Which of the following is not a transmission medium? a. telephone lines b. coaxial cables c. modem d. microwave systems

Description : Which of the following is not a transmission medium? a. telephone lines b. coaxial cables c. modem d. microwave systems

Last Answer : microwave systems

The physical layer provides __________a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned

Description : The physical layer provides __________ a. mechanical specifications of electrical connectors and cables b. electrical specification of transmission line signal level c. specification for IR over optical fiber d. all of the mentioned

Last Answer : d. all of the mentioned

The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal levelC. specification for IR over optical fiber D. all of the mentioned

Description : The physical layer provides __________ A. mechanical specifications of electrical connectors and cables B. electrical specification of transmission line signal level C. specification for IR over optical fiber D. all of the mentioned

Last Answer : D. all of the mentioned

The types of Unguided transmission channel or media used for LAN are __. A. Twisted Pair Cables B. Coaxial Cables C. Radio Waves D. All the above

Description : The types of Unguided transmission channel or media used for LAN are __. A. Twisted Pair Cables B. Coaxial Cables C. Radio Waves D. All the above

Last Answer : C. Radio Waves

The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned

Description : The physical layer provides __________ a) mechanical specifications of electrical connectors and cables b) electrical specification of transmission line signal level c) specification for IR over optical fiber d) all of the mentioned

Last Answer : d) all of the mentioned

The advantage of cables over overhead transmission lines is (a) easy maintenance (b) low cost (c) can be used in congested areas (d) can be used in high voltage circuits

Description : The advantage of cables over overhead transmission lines is (a) easy maintenance (b) low cost (c) can be used in congested areas (d) can be used in high voltage circuits

Last Answer : (c) can be used in congested areas

They experimented with light transmission cables through bundle of fibers and lead to the development of flexible fiberscope. ∙ A. Townes, Schawlow and Kao ∙ B. Maiman, Kao and Bockham ∙ C. Maurer, Kapron and Keck ∙ D. Van Heel, Hopkins and Kapany

Description : They experimented with light transmission cables through bundle of fibers and lead to the development of flexible fiberscope. ∙ A. Townes, Schawlow and Kao ∙ B. Maiman, Kao and Bockham ∙ C. Maurer, Kapron and Keck ∙ D. Van Heel, Hopkins and Kapany

Last Answer : D. Van Heel, Hopkins and Kapany

They experimented with light transmission cables through bundle of fibers and lead to the development of flexible fiberscope

Description : They experimented with light transmission cables through bundle of fibers and lead to the development of flexible fiberscope

Last Answer : Van Heel, Hopkins and Kapany

Transmission of power by a.c. cables is impossible beyond

Description : Transmission of power by a.c. cables is impossible beyond   (a) 500 km (b) 300 km (c) 250 km (d) 45 km 

Last Answer : D

The main limitation for power handling capability of short length transmission lines and cables is

Description : The main limitation for power handling capability of short length transmission lines and cables is (A) power factor (B) stability (C) thermal effect limit (D) conductor size

Last Answer : The main limitation for power handling capability of short length transmission lines and cables is thermal effect limit

Emulsifier protection is associated with: a) Grounding protection b) Dielectric strength protection of cables and conductors c) Lightning protection d) Fire protection

Description : Emulsifier protection is associated with: a) Grounding protection b) Dielectric strength protection of cables and conductors c) Lightning protection d) Fire protection

Last Answer : Ans: D

Which of the following statements concerning electrical cables is correct? A. Where they pass through watertight bulkheads, they should be fitted with watertight stuffing boxes. B. Electric cable coverings should never be grounded. C. Electrical cables must be rigidly held in place by welding of armored cable, or glued in place where nonmetallic insulation is used. D. All of the above.

Description : Which of the following statements concerning electrical cables is correct? A. Where they pass through watertight bulkheads, they should be fitted with watertight stuffing boxes. B. Electric cable coverings should ... , or glued in place where nonmetallic insulation is used. D. All of the above.

Last Answer : Answer: A

All electric cables passing through watertight bulkheads must be _____________. A. installed with watertight stuffing tubes B. grounded on both sides of the bulkhead C. fitted with unions on each side of the bulkhead D. welded on both sides of the bulkhead

Description : All electric cables passing through watertight bulkheads must be _____________. A. installed with watertight stuffing tubes B. grounded on both sides of the bulkhead C. fitted with unions on each side of the bulkhead D. welded on both sides of the bulkhead

Last Answer : Answer: A

When electrical cables penetrate watertight bulkheads, _______________. A. they should be grounded on either side of the bulkhead B. they must be bent to a radius of six diameters C. a watertight stuffing tube capable of accepting packing should be employed D. they should be secured by a clamp

Description : When electrical cables penetrate watertight bulkheads, _______________. A. they should be grounded on either side of the bulkhead B. they must be bent to a radius of six diameters C. a watertight stuffing tube capable of accepting packing should be employed D. they should be secured by a clamp

Last Answer : Answer: C

Electric cables are formed of stranded wire to ____________. A. increase the current carrying capability for a given size wire B. increase their flexibility C. decrease the weight for a given size wire D. assure good conductivity at junction points

Description : Electric cables are formed of stranded wire to ____________. A. increase the current carrying capability for a given size wire B. increase their flexibility C. decrease the weight for a given size wire D. assure good conductivity at junction points

Last Answer : Answer: B

What Is Meant By Insulation Voltage In Cables? Explain It?

Description : What Is Meant By Insulation Voltage In Cables? Explain It?

Last Answer : It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as insulation level of the cable.

Why 1.1 kV grade cables used for 415V?

Description : Why 1.1 kV grade cables used for 415V?

Last Answer : To take care of the both earthed / unearthed systems.  

What are the types of cables used in 6.6 kV and 415 V system voltages?

Description : What are the types of cables used in 6.6 kV and 415 V system voltages? 

Last Answer : In 6.6 kV system AC (unearthed) grade having stranded aluminium conductors cables are used. Their insulation's are as follows. 1. XLPE - Crossed linked polyethylene insulation. 2. FRLS PVC - Fire ... V grade copper or aluminium stranded cables are used. Their insulations are HR PVC and FS type. 

Why fuses with fusing factor more than 1.5 is not allowed in PVC cables?

Description : Why fuses with fusing factor more than 1.5 is not allowed in PVC cables? 

Last Answer : Because PVC cables have low thermal capacity than paper cables. Full loading of PVC only possible if it has close excess current protection (i.e.) Fusing Factor = 1.5 

Why cannot we have cables instead of bus duct in main generator?

Description : Why cannot we have cables instead of bus duct in main generator? 

Last Answer : Very large number of cables in parallel required problems of sealing the terminations. 

What are the tests to be carried out during DC high voltage test on power cables?

Description : What are the tests to be carried out during DC high voltage test on power cables? 

Last Answer : DC high voltage testing. During DC high voltage testing flow of following currents will take place. a. Capacitance charging current. b. Dielectric absorption current. c. Surface leakage current. d. Partial discharge current (corona). e. Volumetric leakage current. 

What are precautions to be taken while doing maintenance or repair work on power cables?

Description : What are precautions to be taken while doing maintenance or repair work on power cables?  

Last Answer : A research organised by EPRI (electric power research institute) on medium voltage XLPE cables found that DC high potential at 80% of the factory value a. Subsequently reduces the life of ... of cramped conductor strands is achieved otherwise it will add resistance and create over heating. 

Why cast aluminium tri-foil clamp is used in single core cables laying?

Description : Why cast aluminium tri-foil clamp is used in single core cables laying?

Last Answer : When three conductors are clamped together the fluxes around the conductors are get cancelled  

What are the advantages of stranded cables?

Description : What are the advantages of stranded cables?

Last Answer : a. It gives flexibility. b. It prevents skin effect. c. Increases current carrying capacity. d. It provides easy in soldering joint. e. If one strand breaks the other will carry the load current.

For LV applications (below 1 kV), ______________ cables are used. (A) Paper insulated. (B) Plastic. (C) Single core cables. (D) Oil filled.

Description : For LV applications (below 1 kV), ______________ cables are used. (A) Paper insulated. (B) Plastic. (C) Single core cables. (D) Oil filled.

Last Answer : Ans: C For low voltage applications single core cables are suitable.

The size of a conductor used in power cables depends on the (A) operating voltage. (B) power factor. (C) current to be carried. (D) type of insulation used.

Description : The size of a conductor used in power cables depends on the (A) operating voltage. (B) power factor. (C) current to be carried. (D) type of insulation used.

Last Answer : (C) current to be carried.

RS-232, RS-449, RS-530, V, 24 and X.21 are examples of ____________. A. standards for interfaces between modems and transmission facilities B. standards for various types of transmission channels C. standards for interfaces between terminals and modems D. standards for end to end performance of data communications system

Description : RS-232, RS-449, RS-530, V, 24 and X.21 are examples of ____________. A. standards for interfaces between modems and transmission facilities B. standards for various types of ... for interfaces between terminals and modems D. standards for end to end performance of data communications system

Last Answer : C. standards for interfaces between terminals and modems

Full form of CVT a) continuously variation transform b) continue various transmission c) continuously various transformation d) continuously variable transmission

Description : Full form of CVT a) continuously variation transform b) continue various transmission c) continuously various transformation d) continuously variable transmission

Last Answer : d) continuously variable transmission

EDI standard a. is not easily available b. defines several hundred transaction sets for various business forms c. is not popular d. defines only a transmission protocol

Description : EDI standard a. is not easily available b. defines several hundred transaction sets for various business forms c. is not popular d. defines only a transmission protocol

Last Answer : b. defines several hundred transaction sets for various business forms 

What Are The Various Types Of Rotors Used In The Alternators?

Description : What Are The Various Types Of Rotors Used In The Alternators?

Last Answer : Salient pole rotor Non- salient pole rotor and Cylindrical rotor

What are the various types of tariff?

Description : What are the various types of tariff?

Last Answer : 1. Simple tariff 2. Flat rate tariff 3. Block rate tariff 4. Two-part tariff 5. Maximum demand tariff 6. Power factor tariff 7. Three-part tariff

What are the various parameters we have to consider, while selecting IGBT?

Description : What are the various parameters we have to consider, while selecting IGBT?

Last Answer : In IGBT datasheet, we have to focus on following parameters Collector to emitter voltage VCESCollector Current ICCollector Dissipation PCJunction Temperature Tj

Name the various methods for predetermining the voltage regulation of 3-phase Alternator.

Description : Name the various methods for predetermining the voltage regulation of 3-phase Alternator.

Last Answer : The following are the three methods which are used to predetermine the voltage regulation of smooth cylindrical type Alternators · Synchronous impedance / EMF method · Ampere-turn / MMF method · Potier / ZPF method

Explain armature reaction of an alternator and its effect on main flux at various power factor.

Description : Explain armature reaction of an alternator and its effect on main flux at various power factor.

Last Answer : 1. zero lagging pf: armature flux lags main flux by 180 . Hence effect is demagnetizing i.e the main flux is reduced 2. lagging pf: it has 2 components demagnetizing and cross magnetizing ... 5. zero leading pf: Armature flux is in phase with main flux. Effect is completely magnetizing.

What are the various types of three phase transformer connections?

Description : What are the various types of three phase transformer connections?

Last Answer : The most common types of transformer connections are, i. Star-Star (Y-Y) ii. Delta-Delta(∆-∆) iii. Star-Delta (Y-∆) iv. Delta-Star (∆-Y) v. Open Delta (V-V) vi. Scott Connection (T-T)

What are the various types of Transformers?

Description : What are the various types of Transformers?

Last Answer : Based on supply 1.Single phase transformer 2.Three phase transformer Based on winding 1.Auto transformer (single winding) 2.Two winding transformer 3. Three winding transformer 4. Six ... transformer Based on function 1. Step up transformer 2.Step down transformer 3.Isolation transformer

List the various types of diesel plants.

Description : List the various types of diesel plants.

Last Answer : Based on number of strokes: (a) Two stroke diesel engine (b) Four srtoke diesel engine Based on orientation: (a) Horizontal diesel engine (b) Vertical diesel engine Based on number of ... (a) single cylinder (b) Multi cylinder And other type like naturally aspirated, superheated etc.,

State the various types of unsymmetrical faults.

Description : State the various types of unsymmetrical faults.

Last Answer : Line to ground ,line to line and double line to ground faults

State the various types of earthing.

Description : State the various types of earthing.

Last Answer : Solid earthing, resistance earthing , reactance earthing , voltage transformer earthing and zig-zag transformer earthing.

Mention the various tests carried out in a circuit breaker at HV labs.

Description : Mention the various tests carried out in a circuit breaker at HV labs.

Last Answer : Short circuit tests, Synthetic tests& direct tests.

What are the various faults that would affect an alternator?

Description : What are the various faults that would affect an alternator?

Last Answer : (a) Stator faults 1, Phase to phase faults 2, Phase to earth faults 3, Inter turn faults (b) 1, Earth faults 2, Fault between turns 3, Loss of excitation due to fuel failure (c) 1, Over ... rise, resulting in shattering of the turbine low pressure casing (d) 1, Fault on lines 2, Fault on busbars

What are the various faults to which a turbo alternator is likely to be subjected?

Description : What are the various faults to which a turbo alternator is likely to be subjected?

Last Answer : Failure of steam supply; failure of speed; overcurrent; over voltage; unbalanced loading; stator winding fault .

List the various types of series and shunt fault?

Description : List the various types of series and shunt fault?

Last Answer : Shunt faults are, Line to ground fault line to line fault, double line to ground fault, three phase fault. Series faults are, One open conductor fault Two open conductor fault

What is the various design of CT's in switchyard?

Description : What is the various design of CT's in switchyard?

Last Answer : Bus coupler CT's- live tank design 2000-1000A/1A All other CT's- dead tank design 800-600-400A/1A - lines and GT. 125A/1A – SUT

What are the various tests on transformers?

Description : What are the various tests on transformers? 

Last Answer : a) Tan delta and capacitance dissipation factor b) Tests on cooling fans c) Tests on OLTC d) Vector group test e) Short circuit test f) Open circuit test g) Insulation resistance test h) Turns ratio test i) Winding resistance test.