Please Log in or Register for more.


115 views

1 Answer

Answer :

The underground system cannot be operated above 66 kV.

Like 0 like

Please log in or register to answer this question.

Related Questions


Draw and explain the construction of underground cables. 
Last Answer : Underground cables:   OR Explanation:- i) Core or conductor: * It function is carry current. * Cable may have single or more than single core conductor. * Conductor ... handling of cables. * It is similar to bedding & consists of fiborous material such as jute. 

Show More

262 views 1 answer







Differentiate between overhead transmission and underground transmission.
Last Answer : Points Overhead line  Underground cable Capital cost  Less More Erecting cost  Less More Time require for completion of work Less More Flexibility More ... Space consumed Space consumed  No space consumed Appearance Not good  Very good 

Show More

64 views 1 answer







State the procedure for laying / installation of underground cable.  
Last Answer : 1) Direct laying Cable: or Trench laying method: Procedure: * For laying of a cable trench about 1.5m deep and 0.5m wide is made along the cable route. * A ... over. * Cables laid in this manner are usually plain lead covered because troughing affords good mechanical protection. 

Show More

176 views 1 answer







Why don't we burry power lines underground ?
Last Answer : Because conductor used for power transmission are not insulated and if we do so it create phase to ground fault causing interruptions to supply.

Show More

107 views 5 answers







Why underground service connections are service connections are costly than overhead service connection
Last Answer : Reason: Underground service connection is given by underground cable. This cable is costly than bare conductor. Sometimes cable trench is required for cable laying, which requires additional cost. So underground service connections are costly than overhead service connection.

Show More

124 views 1 answer







what is the use of bedding on underground cable?
Last Answer : Bedding is the layer above the lead sheath it protects the lead sheath from corrosion that means it gives chemical protection to metallic sheath(lead sheath)

Show More

128 views 1 answer







Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
Last Answer : Thyristor operated dimmer: A popular thyristor operated dimmer circuit employ TRIAC-DIAC phase control for low AC power control. During each half-cycle, the capacitor charges through (R1+VR1). When the ... time constant {C (R1+VR1)}. Thus by reducing VR1 the lamp brightness can be increased.

Show More

368 views 1 answer







Why CT is never operated with an open secondary ?
Last Answer : CT secondary should never be kept open because it will cause saturation of the core to a high level and very high voltage will appear across the secondary which can breakdown the insulation. One terminal of PT secondary is always grounded to avoid capacitive induction and for human safety

Show More

92 views 2 answers







The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min (A) 100 rpm (B) 200 rpm (C) 400 rpm (D) 800 rpm
Last Answer : The speed of a 2-pole, 3-phase stepper motor operated by 1200 pulses/min 200 rpm

Show More

152 views 1 answer








Last Answer : Battery operated trucks are used in factories for material transportation.

Show More

77 views 1 answer








Last Answer : If a D.C. series motor is operated on A.C. supply, it will spark excessively, have poor efficiency, have poor power factor.

Show More

91 views 1 answer








Last Answer : Induction cup relay is operated due to changes in current, voltage, impedance.

Show More

352 views 1 answer







If a transformer is continuously operated the maximum temperature rise will occur in?
Last Answer : If a transformer is continuously operated the maximum temperature rise will occur in windings.

Show More

81 views 1 answer








Last Answer : Overhead system can be designed for operation up to 400 kV.

Show More

210 views 1 answer







Where have all the fire hydrants gone?
Last Answer : I have a yellow one in my yard. My house insurance was discounted because of that.

Show More

2 views 1 answer







The underground system cannot be operated above (a) 440 V (b) 11 kV (c) 33 kV (d) 66 kV
Last Answer : (d) 66 kV

Show More

10 views 1 answer







The underground system cannot be operated above (a) 440 V (b) 11 kV (c) 33 kV (d) 66 kV
Last Answer : (d) 66 kV

Show More

5 views 1 answer







Describe the use of Pneumatic system in daily life.
Last Answer : I. Automatic tyres are inflated with compressed air. II. Spray guns use compressed air for spraying paints. III. Compressed air is used in air powered tools like hammers and drills IV. It is also used in air brake system in heavy vehicles.

Show More

22 views 1 answer







Is it possible for a soil to consist only of one phase?

Show More

1 view 0 answers







Write short note on UPS and its usage in railway system.
Last Answer : Ans. Ideally, the voltage supply by the utility system should be perfect sine wave without any harmonics, at its nominal frequency of 50 Hz and at its nominal magnitude. In practice however voltage can ... load from one source to the other results in the least amount of disturbance seen by the load.

Show More

8 views 1 answer







Septic System Design
Last Answer : Most people, when they get their own property, take all their time designing and building the house first and worry about the septic system later. For the most part it works out just fine, the house is built ... that it's a bad choice-it isn't-but it's practical to always go for the least expensive.

Show More

7 views 1 answer







The Lymphatic System
Last Answer : An Overview of the Lymphatic System The lymphatic system refers to a type of network in the body that consists of the lymphoid organs, lymphatic tissues, lymph ducts, lymph nodes, lymph vessels and ... many ways in which the lymphatic system takes action in a lot of the human body's processes.

Show More

7 views 1 answer







Septic System Maintenance
Last Answer : Nobody is interested in thinking about what happens when someone forgets to clean his or her septic system in the backyard. We don't need to tell you either. Not draining and cleaning your septic ... its regular cleaning schedule you don't have to worry about the system breaking down anytime soon.

Show More

6 views 1 answer







Septic System Cleaning
Last Answer : A septic tank requires cleaning to remove the scum or solid wastes that have accumulated in it over the years. The modern septic system was designed to allow liquid waste to flow freely back out as ... from clogs and impurities? Remember, when the tank goes, the system goes. Take note of that.

Show More

9 views 1 answer







Consider a system with seven processes A through G and six resources R through W. Resource ownership is as follows: process A holds nothing and wants R & W process B holds W but wants T process C holds ... V process F holds R and wants S process G holds V and wants U Is the system deadlocked ?

Show More

2 views 0 answers







How To Make A Sprinkler System
Last Answer : Watering plants can be quite tiresome, especially for huge gardens. You will have to walk through the maze of shrubs, blooms and rocks just to sprinkle every garden plant with water. Thanks to human ... 't join the show American Inventor with this invention; this writer would not be very happy.

Show More

9 views 1 answer







How to Choose a Home Security System
Last Answer : How to Choose a Home Security System Burglars can strike the moment your house is left alone or when everyone's asleep. Even if all the doors are locked, some of them can still enter using their ... protected upon the trigger of an alarm or a flick of a switch from the system's control panel.

Show More

16 views 1 answer







How to Care for Your Immune System
Last Answer : How to Care for Your Immune System Your immune system is important in keeping you healthy, helping you recover from disease and preventing disease from ever affecting you in the first place. The immune ... Live a good long life with a healthy and strong immune system. Remember: Health is wealth!

Show More

7 views 1 answer







How To Boost Your Immune System
Last Answer : How To Boost Your Immune System Your immune system is one of your body's most important parts. It protects you from having to succumb to every little illness that your body is in danger of ... defense against pathogens. Boost your immune system and Ensure that you will live a long and healthy life.

Show More

7 views 1 answer







How to Install a Surround Sound System
Last Answer : How to Install a Surround Sound System The complete multimedia experience is in great part about the perfect execution of sound. While normal stereo speakers are great for watching TV or some movies, ... new surround sound system and enjoy every bit and beat for the best audio experience possible.

Show More

11 views 1 answer







How to Install a Sprinkler System
Last Answer : How to Install a Sprinkler System A sprinkler system promotes convenience in the normally tedious job of watering your lawn or garden. Upon activation, the sprinklers provide water for the entire ... When everything is up and running, you can finally stop worrying about watering the plants.

Show More

8 views 1 answer







How to Uninstall an Operating System ?
Last Answer : How to Uninstall an Operating System Even the most stable operating systems can crash, and suffer from irreparable damage that you may need to uninstall and reinstall them. Some users, though, may like to ... , you can easily remove the old, damaged operating system, and replace it with a new one.

Show More

8 views 1 answer







SOLAR SYSTEM FACTS
Last Answer : There are tons of asteroids in our solar system. One of them, Asteroid 243 Ida, even has it's own moon. One of the moons of Saturn, called Mimas, is heavily cratered. This creates an odd appearance ... our solar system, the sun still accounts for 99.8 percent of the total mass of our solar system.

Show More

6 views 1 answer







Draw a neat sketch of Gating system. State the functions of any four elements.  
Last Answer : Gating system:  1. Sprue: The circular cross section that minimizes heat loss and turbulence is sprue, and the area of it is quantified from the choke area as well as the gating ratio.  2. ... the molten metal flow from the ingate has to be proportional to the casting area's volume. 

Show More

253 views 1 answer







Designate a tool 8 – 10 – 6 – 6 – 5 – 10 – 0.8 signature in ASA system.  
Last Answer : 1. Back rake angle-8 2. Side rake angle-10. 3. End relief angle-6. 4. Side relief angle-6 5. End cutting edge angle-5 6. Side cutting edge angle-10. 7. Nose radius-0.8 mm.

Show More

358 views 1 answer







Draw the labeled block diagram of process control system and explain each block.
Last Answer : Explanation - Process control system consists of process or plant, sensor, error detector, automatic Controller, actuator or control element. 1) Process or plant- process means some manufacturing sequence ... process which changes the process variable. Output of this block is denoted by u .

Show More

822 views 1 answer







Grid distribution system
Last Answer : Grid distribution system:-  In this system, when the feeder or loop or ring is charged (energized) by two or more than two substations from two or more than two different generating stations then it is known as “Grid distribution system. In this system only one feeder is utilized at a time. 

Show More

58 views 1 answer







Define: primary and secondary distribution system 
Last Answer : i) Primary Distribution:  It is a 3-phase, 3-wire transmission line connected in between receiving substation to Distribution substation. OR It is link between receiving substation & ... substation to consumer line. OR It is link between distribution transformer substation & consumer. 

Show More

168 views 1 answer







List classification of distributor system with their advantages each.
Last Answer : According to scheme of connection there are three types of distribution systems: - 1.Radial (Tree) distribution system 2.Ring mains (Loop) distribution system 3. Grid (interconnected) ... It has highest reliability to maintain supply even when there was maintenance on any one feeder.

Show More

70 views 1 answer







State advantages and disadvantages of radial distributor system. 
Last Answer : Advantages of radial distributor system: 1. Design of layout is simple. 2. Capital cost & Erecting cost is less as there is only one feeder. 3. Time required for completion of ... maintain supply to consumers when there is maintenance on feeder. 3. Voltage fluctuations are more.

Show More

422 views 1 answer







Summerise the role of power system engineer.
Last Answer : Role of power system engineer:  i. On the planning side he or she has to make decisions on how much electricity to generate  ii. For operation of the power system he has to plan for ... for energy conservation and load management. viii. For solving the power system problems he has to update with

Show More

67 views 1 answer







State the losses in secondary distribution system. 
Last Answer : The losses in secondary distribution system: a) Technical losses: 1. Due to poor voltage 2. Due to unbalance load 3. Due poor quality of transformer & its components 4. Due to poor quality ... of induction type of energy meter. 3. Lack of administration. 4. Energy theft 5. Unmetered supply

Show More

122 views 1 answer







With neat circuit diagram explain working of emergency light system. 
Last Answer : Emergency lighting system:  In the residential, commercial and industrial areas, the illumination system work with available AC supply. In the event of AC supply failure, partial illumination can be ... glows. In rthis way, on failure of AC supply, light is obtained from DC supply.

Show More

220 views 1 answer







characteristics of Hi-Fi amplifier system.
Last Answer : Characteristics of HI-FI amplifier: 1. Signal to noise ratio should be better than 50dB. 2. Frequency response should be flat within +-1dB. 3. Nonlinear distortion should not be more ... provided. 6. Environmental conditions should be such as to eliminate the external noise in listening room. 

Show More

75 views 1 answer







DTH System
Last Answer : Outdoor unit: It consists of a receiving antenna, low noise amplifier & converter the receiving antenna is parabolic reflector with a horn as the active element. The horn can be ... fed to the normal domestic TV receiver, which after due processing reproduces picture & sound. 

Show More

62 views 1 answer







Describe the function of MUSE system for HDTV.
Last Answer : Bandwidth can be reduced by MUSE (Multiple Sub -Nyquist Sampling Encoding) system MUSE stands for Multiple Sub-Nyquist sampling encoding and is an HDTV bandwidth compression schemedeveloped by ... digital Audio system is called DANCE (Digital Audio Near-Instantaneous Compression and expansion). 

Show More

103 views 1 answer







requirements of a distribution system
Last Answer : Following requirements of a distribution system.  1. Layout should be simple in design. 2. It should have less initial cost 3. The distribution system should have minimum distribution ... stability of existing distribution system. 15. Time required for completion of work should be less. 

Show More

85 views 1 answer







Why radial distribution system used for short distance ? 
Last Answer : Because of following disadvantages radial distribution system is not used for long distance:  Since there is only one feeder to DTC feed at one point so, 1) There is no reliability ... more time for fault finding & repairing Hence radial distribution system is used for short distance.

Show More

116 views 1 answer







vertical deflection system and explain its operation.
Last Answer : The main function of the vertical deflection system , is to provide an amplified signal of proper level to derive the vertical deflection plates without any distortion. For amplification of the ... suppression, reduced nonlinear effects because none of the plates are at ground potential.

Show More

290 views 1 answer







Working of Simple Vapor absorption system
Last Answer : Working of Simple Vapor absorption system:  A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. In this system ammonia ... where there is scarcity of Electricity and it is very useful at partial and full load. 

Show More

68 views 1 answer






Show More⇦ PreviousNext ⇨