1. By which of the following systems electric power may be transmitted ?
2 are the conductors, which connect the consumer's terminals to the distribution
3. The underground system cannot be operated above
4. Overhead system can be designed for operation upto
5. If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as
6. The wooden poles well impregnated with creosite oil or any preservative compound have life
7. Which of the following materials is not used for transmission and distribution of electrical power ?
8. Galvanised steel wire is generally used as
9. The usual spans with R.C.C. poles are
10. The corona is considerably affected by which of the following ?
11. Which of the following are the constants of the transmission lines ?
12. 310 km line is considered as _____.
13. The phenomenon of rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the
14. The square root of the ratio of line impedance and shunt admittance is called the
15. Which of the following is the demerit of a 'constant voltage transmission system' ?
16. Low voltage cables are meant for use up to
17. The operating voltage of high voltage cables is upto
18. The operating voltage of supertension cables is upto
19. The operating voltage of extra high tension cables is upto
20. Which of the following methods is used for laying of underground cables ?
21. Which of the following is the source of heat generation in the cables ?
22. Due to which of the following reasons the cables should not be operated too hot ?
23. Which of the following D.C. distribution system is the simplest and lowest in first cost ?
24. A booster is a ______.
25. Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
26. Which of the following faults is most likely to occur in cables ?
27. The cause of damage to the lead sheath of a cable is
28. The voltage of the single phase supply to residential consumers is
29. Most of the high voltage transmission lines in India are
30. The distributors for residential areas are
31. The conductors of the overhead lines are
32. High voltage transmission lines use
33. Multicore cables generally use
34. Distribution lines in India generally use
35. The material commonly used for insulation in high voltage cables is
36. The loads on distributors systems are generally
37. The power factor of industrial loads is generally
38. Overhead lines generally use
39. In transmission lines the cross-arms are made of
40. The material generally used for armour of high voltage cables is
41. Transmission line insulators are made of _______.
42. The material commonly used for sheaths of underground cables is
43. The minimum clearance between the ground and a 220 kV line is about
44. The spacing between phase conductors of a 220 kV line is approximately equal to
45. Large industrial consumers are supplied electrical energy at
46. In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
47. In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides
48. Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is
49. A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
50. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
51. Which of the following is usually not the generating voltage ?
52. For an overhead line, the surge impedance is taken as
53. The presence of ozone due to corona is harmful because it
54. A feeder, in a transmission system, feeds power to
55. The power transmitted will be maximum when
56. A 3-phase 4 wire system is commonly used on
57. Which of the following materials is used for overhead transmission lines ?
58. Which of the following is not a constituent for making porcelain insulators ?
59. There is a greater possibility of occurence of corona during
60. Which of the following relays is used on long transmission lines ?
61. The steel used in steel cored conductors is usually
62. Which of the following distribution systems is more reliable ?
63. Which of the following characteristics should the line supports for transmission lines possess ?
64. Transmission voltage of llkV is normally used for distances upto
65. Which of the following regulations is considered best?
66. Skin effect is proportional to ______.
67. A conductor, due to sag between two supports, takes the form of
68. In A.C.S.R. conductors, the insulation between aluminium and steel conductors is
69. Which of the following bus-bar schemes has the lowest cost ?
70. Owing to skin effect _____.
71. By which of the following methods string efficiency can be improved ?
72. In aluminum conductors, steel core is provided to
73. By which of the following a bus-bar is rated ?
74. A circuit is disconnected by isolators when
75. For which of the following equipment current rating is not necessary ?
76. In a substation the following equipment is not installed
77. Corona usually occurs when the electrostatic stress in air around the conductor exceeds
78. The voltage drop, for constant voltage transmission is compensated by installing
79. The use of strain type insulators is made where the conductors are
80. The current drawn by the line due to corona losses is
81. Pin type insulators are generally not used for voltages beyond
82. Aluminium has a specific gravity of ______.
83. For transmission of power over a distance of 200 km, the transmission voltage should be
84. For aluminium, as compared to copper, all the following factors have higher values except
85. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical ?
86. In a tap changing transformer, the tappings are provided on
87. Constant voltage transmission entails the following disadvantage
88. On which of the following factors skin effect depends ?
89. The effect of corona can be detected by
90. For transmission of power over a distance of 500 km, the transmission voltage should be in the range
91. In the analysis of which of the following lines shunt capacitance is neglected ?
92. When the inter connector between two stations has large reactance
93. The frequency of voltage generated, in case of generators, can be increased by
94. When an alternator connected to the bus-bar is shut down the bus-bar voltage will
95. The angular displacement between two interconnected stations is mainly due to
96. Electro mechanical voltage regulators are generally used in
97. Series capacitors on transmission lines are of little use when the load VAR requirement is
98. The voltage regulation in magnetic amplifier type voltage regulator is effected by
99. When a conductor carries more current on the surface as compared to core, it is due to
100. The following system is not generally used
101. The skin effect of a conductor will reduce as the
2 are the conductors, which connect the consumer's terminals to the distribution
3. The underground system cannot be operated above
4. Overhead system can be designed for operation upto
5. If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as
6. The wooden poles well impregnated with creosite oil or any preservative compound have life
7. Which of the following materials is not used for transmission and distribution of electrical power ?
8. Galvanised steel wire is generally used as
9. The usual spans with R.C.C. poles are
10. The corona is considerably affected by which of the following ?
11. Which of the following are the constants of the transmission lines ?
12. 310 km line is considered as _____.
13. The phenomenon of rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the
14. The square root of the ratio of line impedance and shunt admittance is called the
15. Which of the following is the demerit of a 'constant voltage transmission system' ?
16. Low voltage cables are meant for use up to
17. The operating voltage of high voltage cables is upto
18. The operating voltage of supertension cables is upto
19. The operating voltage of extra high tension cables is upto
20. Which of the following methods is used for laying of underground cables ?
21. Which of the following is the source of heat generation in the cables ?
22. Due to which of the following reasons the cables should not be operated too hot ?
23. Which of the following D.C. distribution system is the simplest and lowest in first cost ?
24. A booster is a ______.
25. Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ?
26. Which of the following faults is most likely to occur in cables ?
27. The cause of damage to the lead sheath of a cable is
28. The voltage of the single phase supply to residential consumers is
29. Most of the high voltage transmission lines in India are
30. The distributors for residential areas are
31. The conductors of the overhead lines are
32. High voltage transmission lines use
33. Multicore cables generally use
34. Distribution lines in India generally use
35. The material commonly used for insulation in high voltage cables is
36. The loads on distributors systems are generally
37. The power factor of industrial loads is generally
38. Overhead lines generally use
39. In transmission lines the cross-arms are made of
40. The material generally used for armour of high voltage cables is
41. Transmission line insulators are made of _______.
42. The material commonly used for sheaths of underground cables is
43. The minimum clearance between the ground and a 220 kV line is about
44. The spacing between phase conductors of a 220 kV line is approximately equal to
45. Large industrial consumers are supplied electrical energy at
46. In a D.C. 3-wire distribution system, balancer fields are cross-connected in order to
47. In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides
48. Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is
49. A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
50. As compared to a 2-wire D.C. distributor, a 3-wire distributor with same maximum voltage to earth uses only
51. Which of the following is usually not the generating voltage ?
52. For an overhead line, the surge impedance is taken as
53. The presence of ozone due to corona is harmful because it
54. A feeder, in a transmission system, feeds power to
55. The power transmitted will be maximum when
56. A 3-phase 4 wire system is commonly used on
57. Which of the following materials is used for overhead transmission lines ?
58. Which of the following is not a constituent for making porcelain insulators ?
59. There is a greater possibility of occurence of corona during
60. Which of the following relays is used on long transmission lines ?
61. The steel used in steel cored conductors is usually
62. Which of the following distribution systems is more reliable ?
63. Which of the following characteristics should the line supports for transmission lines possess ?
64. Transmission voltage of llkV is normally used for distances upto
65. Which of the following regulations is considered best?
66. Skin effect is proportional to ______.
67. A conductor, due to sag between two supports, takes the form of
68. In A.C.S.R. conductors, the insulation between aluminium and steel conductors is
69. Which of the following bus-bar schemes has the lowest cost ?
70. Owing to skin effect _____.
71. By which of the following methods string efficiency can be improved ?
72. In aluminum conductors, steel core is provided to
73. By which of the following a bus-bar is rated ?
74. A circuit is disconnected by isolators when
75. For which of the following equipment current rating is not necessary ?
76. In a substation the following equipment is not installed
77. Corona usually occurs when the electrostatic stress in air around the conductor exceeds
78. The voltage drop, for constant voltage transmission is compensated by installing
79. The use of strain type insulators is made where the conductors are
80. The current drawn by the line due to corona losses is
81. Pin type insulators are generally not used for voltages beyond
82. Aluminium has a specific gravity of ______.
83. For transmission of power over a distance of 200 km, the transmission voltage should be
84. For aluminium, as compared to copper, all the following factors have higher values except
85. Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical ?
86. In a tap changing transformer, the tappings are provided on
87. Constant voltage transmission entails the following disadvantage
88. On which of the following factors skin effect depends ?
89. The effect of corona can be detected by
90. For transmission of power over a distance of 500 km, the transmission voltage should be in the range
91. In the analysis of which of the following lines shunt capacitance is neglected ?
92. When the inter connector between two stations has large reactance
93. The frequency of voltage generated, in case of generators, can be increased by
94. When an alternator connected to the bus-bar is shut down the bus-bar voltage will
95. The angular displacement between two interconnected stations is mainly due to
96. Electro mechanical voltage regulators are generally used in
97. Series capacitors on transmission lines are of little use when the load VAR requirement is
98. The voltage regulation in magnetic amplifier type voltage regulator is effected by
99. When a conductor carries more current on the surface as compared to core, it is due to
100. The following system is not generally used
101. The skin effect of a conductor will reduce as the
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