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On the basis of distance from generating station to  distributers
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Description : If a 5-bus test system contains 6 transmission lines and one transformer, how many non-zero elements are there in the system Y-bus ? (A) 25 (B) 12 (C) 11 (D) 19

Answer : If a 5-bus test system contains 6 transmission lines and one transformer, 19 non-zero elements are there in the system Y-bus.

Description : Why are overhead transmission lines not insulated?

Answer : Insulators are useful to help separate electrical conductors when they come into physical contact. Overhead Transmission Lines Are Not Insulated: The overhead transmission line is carrying extreme high voltage and ... a whole lot of thick insulation to absorb the heat produced by such high voltage.

Description : Bundled conductors are mainly used in high voltage overhead transmission lines to (a) Reduce line loss (c) Reduce corona (b) Reduce harmonics (d) Increase strength

Answer : Bundled conductors are mainly used in high voltage overhead transmission lines to Reduce corona 

Description : Shunt Inductors are primarily installed in transmission lines to : (A) Improve Power Factor (B) Improve Stability (C) Reduce Ferranti Effect (D) Improve Voltage Profile

Description : Transmission lines are transposed to : (A) Reduce copper loss (B) Reduce skin effect (C) Prevent interference with neighbouring telephone lines (D) Prevent short-circuit between any two lines

Answer : a

Description : Hollow conductors are used in the transmission lines to:  (1) Improve heat dissipation (2) Reduce corona loss (3) Reduce skin effect (4) Reduce the line inductance

Answer : Hollow conductors are used in the transmission lines to: Reduce corona loss.

Answer : Copper conductors are generally used for transmission lines because it has longer life and high conductivity.

Description : How robots are classified on the basis of work place? Give one example of each robot.

Answer : Classification of robot:  Material Processing robot  Material handling robot  Assembly robot  Inspection robot Type of Robot Example Material processing robot 1. Spot ... the presence or absence of a component in an assembly line using touch or an optical sensor.

Description : What happens insulators when high voltage passes through transmission lines whether it breaks or lose it's insulating property?

Answer : I think it will breaks when it crosses breakdown voltage .

Description : What type of earthing is used by transmission lines?

Answer : Preventive  multiple  earthing  PME.

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

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

Description : Bulk power transmission over long HVDC lines is preferred because of

Answer : Bulk power transmission over long HVDC lines is preferred because of Low cost of HVDC terminal

Description : In case of open circuited transmission lines the reflection coefficient is given by (A) 1 (B) -1 (C) 0.5 (D) 0

Description :  Transmission lines connect: -  a) Generating station to a switching station / step down transformer station b) Step down transformer station to service transformer banks c) Distribution transformer to consumer premises d) Service points to consumer premises

Answer :  Transmission lines connect: - Generating station to a switching station / step down transformer station 

Description : HV transmission lines use   (a) Pin type insulators (b) Suspension insulators (c) Both (a) and (b) (d) None of the above

Answer : The transmission lines which feed different sub-stations represent primary distribution.

Answer : Transmission lines use high voltage to reduce the amount of power loss over long distance. This power loss can come from large current running through the cable due to the resistance of the cable conductor. Stepping up the voltage reduces the amount of current through transmission lines.

Description : For extra high voltage ac transmission lines, conductors used are (a) All aluminium (b) All steel (c) AAAC (d) ACSR

Description : Consider the following statements: Over head transmission lines are provided with earth wires: 1 . To protect the transmission line from direct lightning strike 2. To protect the transmission line insulation from the indirect lightning strike ... (1) 1 and 3 (2) 1 and 4 (3) 1 only (4) 2 on|y

Answer : Consider the following statements: Over head transmission lines are provided with earth wires: 1 . To protect the transmission line from direct lightning strike 2. To protect the transmission line insulation from the indirect lightning ... (1) 1 and 3 (2) 1 and 4 (3) 1 only (4) 2 on|y

Answer : Series capacitors on transmission lines are of little use when the load VAR requirement is small.

Description : How are instruments classified? Describe the different types.

Answer : The instruments are classified depending upon: a. Principle of operation: E.g.: Magnetic meter, induction meter. b. Permissible percentage error c. Depending upon application: E. ... measured by observing the output indicated by instrument. Example: Voltmeter, Thermometer, pressure guage.

Description : Rocks are classified depending upon how they are formed. In which class would marble be found?

Answer : ANSWER: METAMORPHIC

Description : Rocks are classified depending upon how they are formed. In which class would slate be found?

Answer : ANSWER: METAMORPHIC 

Description : How instruments are classified?

Description : The device that converts computer output for transmission over telephone lines is called (1) interface (2) interpreter (3) modem (4) I/O port

Answer : modem

Description : State the effects of low power factor on efficiency and voltage regulation of short transmission lines. 

Answer : i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor) 

Description : State the classification of transmission lines depending on length of transmission lines. 

Answer : A) According to Voltage level: ( 2 Marks)  a) High voltage Transmission Line (HV) up to 33 KV  b) Extra High Voltage Transmission Line (EHV) above 33 KV up to 400 KV  c) Ultra ... Transmission Line: - The length of Long transmission Line is above 200KM and its line voltage is above 100KV

Answer : • Short line approximation for lines that are less than 80 km long.  • Medium line approximation for lines whose lengths are between 80 km to 250 km.  • Long line model for lines that are longer than 250 km.  

Description : Real power flow in transmission lines is controlled by (A) tap changing transformer (B) voltage regulating transformer (C) phase-angle regulating transformer (D) booster transformer 

Description : The economic size of a conductor in transmission and distribution lines of electric power is decided by (a) Ohm’s law (b) Kelvin’s law (c) Kirchhoff’s law(d) Faraday’s law 

Description : In long AC transmission lines, the receiving end voltage becomes greater than sending end voltage at light load or no load operation. This is due to (a) Ferranti effect (b) Skin effect (c) Proximity effect (d) Corona effect 

Description : In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Answer : In which of the following transmission lines, the value of the Shunt admittance should be approximated to zero ? (A) A 66 kV 35 km long line (B) A 132 kV 200 km long line (C) A 220 kV 300 km long line (D) A 400 kV 500 km long line

Description : The purpose of guard ring in transmission lines is to  (1) reduce the earth capacitance of the lowest unit. (2) increase the earth capacitance of the lowest unit. (3) reduce the transmission lines losses. (4) reduce the reactance of the line

Answer : The purpose of guard ring in transmission lines is to reduce the earth capacitance of the lowest unit.

Description : Corona loss in transmission lines can be reduced by (A) using small diameter conductors (B) using bundled conductors (C) using less spacing between conductors (D) increasing the transmission line voltage

Answer : Corona loss in transmission lines can be reduced by using bundled conductors

Description : why we use aluminium conductor and not copper in transmission lines ?

Answer : Because copper conductor are costlier than aluminium conductor

Description : How much of Australia is classified as desert A) 8% B) 16% C) 25% D) 35%

Answer : D - 35% 

Description : An intersection is a point where two or more lines/curves meet or cross. How many intersections are there in the figure given below? 

Answer : 17

Description : How many volts are in the power lines?

Description : 1. By whom were the members of the Constituent Assembly elected? 2. How much does one degree of the circumference of the earth measure (approx.)? 3. Which was the dynasty that succeeded ... of High Court judges be reduced? 20. Which electromagnetic radiation is most prevalent in the atmosphere?

Answer : Answer : 1. By Provincial Assemblies 2. 111 km 3. Rashtrakutas 4. Convection 5. Agricultural farmers 6. Hamilton (Canada) 7. Decreases with height 8. Tanka 9. Cholera 10. 24 11. Efflorescence 12 ... 16. Plasma membrane 17. Cadiz (Spain) 18. Ramtanu Pande 19. During a Financial Emergency 20. Infrared

Description : In case of a ‘High Voltage DC’ transmission, how many minimum conductors are required?

Answer : In case of a ‘High Voltage DC’ transmission, how many minimum conductors are required? one

Description : According to the scheme of connection the distribution system is classified as: a. Radial system b. Ring main system c. Inter-connected system d. All of the above 

Answer : According to the scheme of connection the distribution system is classified as: a. Radial system b. Ring main system c. Inter-connected system d. All of the above 

Description : The Lamp resistance of a mini-torch light, operating on 1.5 volts is classified as _____________resistance. A. Low B. Medium C. High D. None of these 

Answer : The Lamp resistance of a mini-torch light, operating on 1.5 volts is classified as Medium resistance.

Description : White Box techniques are also classified as a) Design based testing b) Structural testing c) Error guessing technique d) None of the mentioned

Answer : Ans : b

Description : Certain substances are classified as water pollutants, others as air pollutants and still others as land pollutants. Which of the following pollutes all three parts of our environment? w) fluorocarbons x) smog y) acid rain z) ozone

Answer : ANSWER: Y -- ACID RAIN

Description : Mineral acids are also classified as: w) carboxyl acids x) inorganic acids y) non-electrolytic acids z) oxidation acids

Answer : ANSWER: X -- INORGANIC ACIDS

Description : Gels and Foams are classified as: w) solutions x) emulsions y) colloids z) suspensions

Answer : ANSWER: C -- COLLOIDS

Description : The survey research are classified under the Options: A) Fundamental researches B) Experimental researches C) Both of the above D) None of the above

Answer : C) Both of the above 

Description : In an economy, the sectors are classified into public and private on the basis of (1) employment conditions (2) nature of economic activities (3) ownership of enterprises (4) use of raw materials

Answer :  ownership of enterprises 

Description : The climatic zones are classified on the basis of (1) distance from the equator (2) elevation (3) rainfall (4) distance from the sea

Answer : rainfall

Answer : According to application, instruments are classified as switch board, portable.

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