Description : The ‘sheath’ is used in cable to (A) provide strength to the cable. (B) provide proper insulation. (C) prevent the moisture from entering the cable. (D) avoid chances of rust on strands.
Last Answer : Ans: A The sheath in underground cable is provided to give mechanical strength.
Description : Need a lot of home repairs roof Leaking, floor tile bathroom coming off of floor, toilet leaks not able to use bedroom no insulation on home addition. plaster falling from ceiling ,retired on fixed income?
Last Answer : Where can I get grants that don,t need to pay bacK?
Description : Pick up the incorrect statement from the following: (A) Tresguet did not provide the top camber for the drainage of surface water (B) Tresguet provided the top camber for the drainage of surface ... (D) Macadam provided a camber to the formation at the dug-up state, to drain percolated water
Last Answer : Answer: Option A
Description : The intersheaths in the cables are used to (a) minimize the stress (b) avoid the requirement of good insulation (c) provide proper stress distribution (d) none of the above
Last Answer : (c) provide proper stress distribution
Description : Pick up the correct statement from the following: A. Inlets are provided on the road surface at the lowest point for draining rain water B. Inlets are generally provided at an interval of ... along straight roads C. Inlets having horizontal openings, are called horizontal inlets D. All the above
Last Answer : ANS: D
Description : Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor
Last Answer : Ans: B
Description : In order to improve the power factor ___ device is employed in the substation a) Synchronous condenser b) Synchronous reactor c) Series Capacitors d) None of the above
Last Answer : Ans: A
Description : What is the first equipment of the substation connected to the incoming transmission line?
Last Answer : Lightning arrestor is the first equipment of the substation connecting the incoming transmission lines. It protects other substation equipment from lightning and switching surges by suppressing them to ... between both the ends of major equipment such as power transformers for protection.
Description : What are different Bus bar materials used in Substation?
Last Answer : Busbars are generally made of copper and Aluminum. Aluminim has the advantage of one third the weight of the copper and also Aluminum requires less maintenance and proper use of alloys provide necessary rigidity required for bus material. Aluminum is used widely in EHV and HV stations
Description : What are the different electrical clearances in Substation?
Last Answer : Ground Clearance: This is the minimum distance between any live conductor and the earth or ground. Phase Clearance: It is the clearance between the different phases in a circuit or same phases in different ... The limits of work section may be ground or the platform on which the person is working.
Description : What are the different substation components
Last Answer : Circuit Breakers, Disconnecting switches, Grounding switches, Current Transformers, Potential Transformers or Capacitor voltage Transformers, Line Traps, Lightning Arrestors, Power Transformers, Shunt ... Station Buses and Insulators, Grounding system, Series capacitors and shunt capacitors.
Description : Locations where Gas Insulated Substation is preferred
Last Answer : Gas Insulated Substations are preferred in the places where land requirement for the substation is difficult such as in populated areas and highly polluted areas where outdoor switchyard is not ... pollution and saline environment. Under such case indoor GIS substation is very much helpful.
Description : What are different insulators used in substation
Last Answer : Different Insulators: Over head electrical conductors used for transmitting electric power is mostly bare and not covered with any insulation medium. The bare line conductors are ... Post insulators for support Stray arm insulators Shaft insulators Sectionalising insulators Connecting rod insulators
Description : What are the necessary tests to determine the efficiency, voltage regulation, and temperature rise of winding & insulation of transformer?
Last Answer : 1.Direct loading test 2.Open circuit test 3. Short circuit test 4. Sumpner's or back to back test
Description : What does putting oil in a car, without draining the old oil do?
Last Answer : From Tom & Ray: When you overfill the crankcase by a quart or more, then you risk foaming the oil. If the oil level gets high enough, the spinning crankshaft can whip the oil up into a froth, like ... 's not much left in the glass-what you get is mostly air. And air can't lubricate your engine.
Description : Air gap readings should be taken periodicly on electrical generation equipment to __________. A. determine the amount of varnish that can be applied to correct insulation problems B. determine the ... field coil bolts and correct lateral adjustment of the field coils D. increase machine efficiency
Last Answer : Answer: B
Description : Laminations in the transformer core are provided to avoid (a) continuous air gap (c) to reduce exiting current (b) to reduce the weight (d) to reduce copper losses
Last Answer : To reduce eddy current and hysterisis losses
Description : Name the features for reducing D20 leaks.
Last Answer : a. Reduce valves and fittings in the pipelines. b. Use welded joints instead of flanged joint.
Description : If an alternator is to be inactive for a considerable period of time, which of the following actions should be taken? A. It should be disconnected from the prime mover and raised off its bearing supports ... . D. The windings and collector rings should be protected with a thin coat of grease or oil.
Last Answer : Answer: C
Description : Which of the following statements best describes the material known as varnished cambric? A. Felted asbestos sealed with varnish. B. Cotton cloth coated with insulating varnish. C. Rubber ... Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.
Description : In the illustrated 450 VAC system, what should be provided between the bus and the device labeled 'F'? EL-0003 A. a potential transformer B. a current transformer C. an emergency disconnect device D. an audible alarm and indicating light
Last Answer : Answer: A
Description : How Transformer Protection provided for internal faults?
Last Answer : 1.Bucholz Relay (1st Stage Alarm and 2nd Stage Trip) 2.Sudden Pressure Relay (1st Stage Alarm and 2nd Stage Trip) 3.Pressure Relief Valve (1st Stage Alarm and 2nd Stage Trip) 4.Pressure Switch ... 8.Gas Temperature Indicator (Alarm) 9.Silicon Breather (Passive - no alarm) 10.Smoke Detector (Alarm)
Description : What is the purpose of providing Taps in transformer and where these are provided?
Last Answer : In order to attain the required voltage, taps are provided, normally at high voltages side(low current).
Description : What is the speciality of the inverter output transformer? Why it is provided?
Last Answer : a) This eliminates all 3rd harmonics in the output voltage. b) Solid earthed neutral is required for the inverter output, hence the interconnected star winding is essential. c) ... will cause circulating current between inverters during unbalanced faults. The inverters cannot withstand this.
Description : You discover the weeds growing in your yard are edible. Do you eat them?
Last Answer : I eat the young dandelion greens regularly.
Description : How do you get rid of tough weeds on 2 acres growing around fruit trees organically?
Last Answer : I have the same problem............after a heavy soaking rain, I go out the next morning with heavy gloves & a small bench and pull them out and bag & trash them. I am afraid to use chemicals around the trees.
Description : Where can I find heavy duty plastic to prevent weeds from growing in veg garden
Last Answer : Get the black plastic tarp (6 mil or thicker) at Home Depot's paint department. I put it down in my backyard over bare dirt and it kept any weeds from growing ever.
Description : How do I get rid of and stop weeds and tall grasses from growing in my raspberry bushes?
Last Answer : You have to be careful some have thorns.....I have weeds also....I just do pulling weeds so much at a time. I don't to use chemicals on food products.
Description : how to get rid of violet weeds that are growing and pushing out the grass
Last Answer : vinegar is safe...use a squirt container to kill the roots...it will kill some grass but the grass will come back......when you cut your grass in that area use a bag and that will take care ... You could use weed & feed but that is a chemical keep children and pets away until the first good rain.
Description : With reference to agriculture, what are Smother Crops ? a Crops that are grown for grazing of harvesting for immediate or future feeding of livestock. b Crops grown to conserve the soil ... season when main crop fails. e Crops whose culture practices allow the infestation of weeds intensively.
Last Answer : e Crops whose culture practices allow the infestation of weeds intensively.
Description : In an oil filled transformer, oil is provided for (A) cooling (B) insulation (C) lubrication (D) both (A) and (B)
Last Answer : In an oil filled transformer, oil is provided for (A) cooling (B) insulation (C) lubrication (D) both (A) and (B)
Description : When shore power is being connected to a ship in dry dock, _____________. A. the ship's generators are paralleled with the shore power to provide continuous power B. proper phase sequence must be ... 450 volts must be supplied from the shore D. exactly 60 Hz must be provided by the terminal
Description : Pick up the correct statement from the following: (A) Sand stones may be divided into calcareous, siliceous and ferruginous sand stones (B) Concrete using sand stones, cracks due to excessive shrinkage (C) Broken bricks produce a concrete having good fire resisting qualities (D) All the above
Last Answer : Answer: Option D
Description : Pick up the correct statement from the following: (A) Safety fences are provided on either side of a roadway if embankments are in excess of 6 metres (B) Safety fences are provided on outside of the ... 2.5 metres intervals if embankments are between 1.6 metres to 3 metres (D) All the above
Description : The function of oil in a transformer is to provide A) Insulation and cooling B) Protection against Lightning C) Protection against short circuit D) Lubrication
Last Answer : The function of oil in a transformer is to provide Insulation and cooling
Description : Which mirror is used to avoid an accident at a bend in a mountain road ?
Last Answer : Plane mirrors are used to avoid accidents on hilly road bends.
Last Answer : fuse Use To do Is.
Description : If your neighbour knows about your blood group, all of a sudden his child fell down to a road accident, and he request you to donate blood to save his child's life, what decision would you ... will immediately agree to donate your blood D) You will suggest him to arrange blood from a Blood-bank
Last Answer : C) You will immediately agree to donate your blood
Description : In a substation the following equipment is not installed (a) exciters (b) series capacitors (c) shunt reactors (d) voltatre transformers
Last Answer : (a) exciters
Description : Draw a block diagram of WPP substation. State function of each block.
Last Answer : Block Diagram of WPP Substation: OR Wind Turbine : Converts wind power to rotational mechanical energy Gear Box: Transfer low speed to high. Generator: Converts rotational ... to DC and vice-versa of correct frequency. Transformer: Step up the voltage to grid level.
Description : State the condition for selecting site for distribution substation.
Last Answer : Following condition should be considered while selecting site for distribution sub-station:- 1. Near load center : Sub-station should be located near load center to reduce cost of Transmission and ... free from earthquake : To avoid damage to sub-station area should be free earth quake.
Description : State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line
Last Answer : Significance of earthing: * Earthing means connecting the body of the electrical equipment (it means the part which does not carries current under normal condition) to the earth. For example electrical equipment' ... surrounded by charcoal and salt. the values of earth resistances for:
Description : State the classification of distribution substation.
Last Answer : The classification of distribution substation. 1. Pole mounted distribution substation 2. Plinth mounted distribution substation 3. Compact/prefabricated distribution substation 4. ... Indoor distribution substation 6. Outdoor distribution substation 7. Mobile distribution substation
Description : What is the purpose of auxiliary controller in substation?
Last Answer : The systems of substation auxiliaries ensure operation of substations providing internal consumers of substations with operating direct and alternating currents. Any breakdown (loss) of auxiliary systems ... whole substation, as well as serious problems during its subsequent putting into operation.
Description : Classification of Substation According to Method of Construction
Last Answer : Classification of Substation According to Method of Construction:- 1. Indoor Substation 2. Outdoor Substation 3. Gas insulated Substation 4. Underground Substation 5. Pole mounted substation 6. Plinth Substation 7. Compact/prefabricated substation
Description : Write down the circuit breaker with their rating used in traction substation. Explain any one.
Last Answer : Circuit Breaker With Their Rating Used in Traction Substation: Rated capacity of a circuit breaker is 750Amps at 25 kV, 500MVA. Its overall tripping time is 0.14 seconds composed of 0.04 ... but in case of traction substation application, mostly Minimum Oil Circuit Breaker (MOCB) is preferred.
Description : Isolator in substation is open under ___________ condition? (A) No load (B) Short circuit (C) Full load (D) None of the above
Last Answer : no load
Description : Distributed under Creative Commons Attribution-ShareAlike - CC BY-SA.
Last Answer : Some important components/equipments in substation As told earlier, the function of a substation is to receive power at some voltage through incoming lines and transmit it at some other voltage through ... range ammeter to indicate the line current. Version 2 EE IIT, Kharagpur
Description : What does a substation do?
Last Answer : At the substations, power is boosted up for long distance transmission.
Description : How can you remove smoke damaged stains after a fire accident?
Last Answer : To remove soot and smoke from walls, furniture and floors, use a mild soap or detergent or mix together 4 to 6 tbsp. Tri - sodium phosphate and 1 cup household cleaner or chlorine bleach to ... warm water. Wear rubber gloves. Be sure to rinse surfaces with clear warm water and dry thoroughly ..