2. The useful life of static capacitor can be expected to be
Correct : D. 8 to 10 years
3. The fixed cost of a power plant depends on
Correct : A. Installed capacity
4. In the geysers steam is continuously vented through fissures in the ground. These vents are called
Correct : C. fumaroles
5. One kilowatt hour is nearly equal to
Correct : A. 3400 B.T.U.
6. Total load transmitted through a 3-phase transmission line is 10,000 kW at 0.8 power factor lagging. The I2 R losses are 900 kW. The efficiency of transmission line is
Correct : B. 90%
7. A draft tube is a part of which power plants?
Correct : D. Hydro-electric power plant
8. Material generally used for bus bars is
Correct : D. copper
9. The calorific value of which of the following files is expected to be nearly equal?
Correct : D. Petrol and diesel oil
10. The critical pressure water is
Correct : B. More than 200 kg/cm2
11. Cleat is
Correct : A. main joint in a coal seam along which it breaks most easily
12. The disadvantage of constant voltage transmission is
Correct : A. short circuit current of the system is increased
13. Which of the following is a petroleum fuel?
Correct : D. Naphta
14. Baryon is one of the class of heavy elementary particles that includes
Correct : D. All of the above
15. A single unit of 50 MW is generally not available with which type of power plant?
Correct : A. Diesel engine power plant
16. In the areas where snowfall is frequent, under worst conditions, the thickness of ice on a conductor is
Correct : A. 1.25 cm
17. Most of the generators in thermal power plants run at
Correct : B. 3000 rpm
18. Which of the following state in India is relatively rich in coal deposits?
Correct : E. Bihar
19. Corona effect can be detected by
Correct : D. all of the above
20. Least overall efficiency can be expected in which type of power plant?
Correct : B. Steam power plant
21. Which of the following engine has the highest air-fuel ratio?
Correct : C. Gas turbine
22. Visible spectrum of light has wavelength in the range
Correct : A. 4000 to 7000 A
23. Which of the following equipment is not installed in a substation?
Correct : A. Exciters
24. Which of the following equipment has power factor closer to unity
Correct : A. GLS lamp
25. Which of the following power plant has the highest cost per kW installed?
Correct : A. Nuclear power plant
26. Power factor is expected to be highest in case of
Correct : D. GLS lamp
27. Low grade fuels have
Correct : C. Low calorific value
28. The protection against lightning is provided by
Correct : E. Any of the above
29. Barn is
Correct : B. a unit of area
30. The major share of power in India is provided by which of the following type of power plant?
Correct : E. Steam power plant
31. Batteries used for electrical energy storage are
Correct : C. Lead acid cells
32. Which of the following converts electrical energy to radiant heat?
Correct : D. Incandescent lamp
33. The most economic voltage for transmitting given power over a known distance by overhead transmission lines is approximately
Correct : A. 0.6 kV/km
34. Steel poles for transmission lines need protection against
Correct : C. corrosion
35. Integrated demand is
Correct : A. the demand averaged over a specified period
36. Osmotic energy conversion involves energy production from
Correct : D. salt water
37. Pin insulators are normally used upto voltages of about
Correct : D. 25 kV
38. A generating station is to supply four regions of loads with peak demands of 10 MW, 15 MW, 20 MW and 30 MW. If the diversity factor is 1.5 the maximum demand on the station is
Correct : D. 50 MW
39. The power supplied to domestic consumers is at 220 volts. This represents
Correct : C. rms value of voltage
40. Diversity factor has direct effect on the
Correct : A. fixed
41. Gas turbine power plants are being established at all of the following places EXCEPT
Correct : D. Jagdishpur
42. Which of the following gives nearly monochromatic light?
Correct : A. Sodium vapour lamp
43. The permissible pH value of water of boilers is
Correct : C. Slightly more than 7
44. For a power plant, the cost of labour is considered as
Correct : B. variable
45. For extinguishing electrical fires
Correct : D. Carbon tetrachloride fire extinguisher should be used
46. Skin effect results in
Correct : B. increased effective resistance but reduced effective internal reactance of the conductor
47. Which of the following contributes to the improvement of efficiency of Rankine cycle in a thermal power plant?
Correct : D. All of the above
48. Which of the following disadvantages occurs due to low power factor?
Correct : E. All of the above
49. Which of the following statement is incorrect?
Correct : C. Tension and sag in transmission lines are complementary to each other
50. In geothermal power plants waste water is
Correct : C. discharged back to earth
51. In pumped storage plant
Correct : D. Downstream water is pumped upstream during off-load periods
52. The effect of corona can be reduced by
Correct : B. Increasing the conductor size and also by increasing the spacing between the conductors
53. Which of the following fuel consists almost entirely of fixed carbon and ash?
Correct : D. coke
54. ACSR conductor implies
Correct : D. Aluminium conductor steel reinforced
55. Turnaround efficiency of battery energy storage system is around
Correct : A. 75 percent
56. Coal broken into angular fragments is known as
Correct : B. coal breccia
57. A graphical representation of discharge and time is known as
Correct : C. Hydrograph
58. Pulverized coal is fed to the boiler through
Correct : D. burners
59. In solar thermal conversion systems the solar heat is transferred to
Correct : D. any of the above
60. Fixed carbon in case of bituminous coals is less than
Correct : A. 70%
61. Existence of which gs in atmosphere causes green house effect?
Correct : A. Carbon dioxide
62. In a diesel engine, the consumption of diesel oil per BHP per hour is nearly
Correct : B. 200 grams
63. First geothermal energy plant in India was tried at
Correct : A. Himachal Pradesh
64. The formula for Cetane is
Correct : D. C16H34
65. The vacuum inside a incandescent lamp is of the order of
Correct : C. 10-4 mm Hg
66. Humacite is the name associated with
Correct : C. bitumins
67. Tidal energy plant in India is being located at
Correct : B. Gujarat
68. When pulverised fuel is not used the equipment used for feeding coal to the boiler is
Correct : A. Stoker
69. In case the characteristic impedance of the line is equal to the load impedance
Correct : D. all the energy sent will be absorbed by the load
70. The specific gravity of aluminium is
Correct : D. 2.71
71. The illumination level in the houses is usually in the range
Correct : D. 100 to 1400 lumens/m2
72. For under water movement of a submarine the power is provided by
Correct : E. Batteries
73. For constant voltage transmission, the drop is compensated by installing
Correct : A. synchronous motors
74. The total power of a wind stream is proportional to
Correct : C. (velocity of stream)3
75. Which of the following is considered to be superior quality coal for power plants?
Correct : B. Bituminous coal
76. The string efficiency in an ac system is
Correct : A. 100%
77. In a thermal power plant, among the variable costs, fuel accounts for nearly
Correct : C. 75 to 80 percent of total cost
78. Alternating current power is transmitted at high voltages
Correct : B. to minimise transmission losses
79. For low head and high discharge the hydraulic turbine preferred is
Correct : C. Kaplan turbine
80. The initial cost of an equipment is Rs. 20 lakhs and depreciated cost after ten years is Rs. 15 lakhs. The useful life of the equipment is
Correct : D. Cannot be determined on the basis of the information provided
81. The output of a solar cell is of the order of
Correct : B. 0.5 W
82. Radio carbon has half life of
Correct : D. 5770 years
83. Candela is the unit of
Correct : B. Luminous intensity
84. Direct conversion of heat into electric power is possible through
Correct : C. thermionic converters
85. Bottoming cycle is common in
Correct : A. cement plants
86. Which of the following domestic utility item consumes maximum power?
Correct : C. Cooking range
87. Compressed air is required generally in which of the following power plants?
Correct : D. Diesel engine power plant
88. In steam power plants exhaust steam from turbine goes to
Correct : C. condenser
89. Satellites are powered by
Correct : B. Solar cells
90. The unit of luminous flux is
Correct : C. Lumen
91. Out of the following system of distribution, which system offers the best economy?
Correct : A. Direct current system
92. Guard ring transmission line
Correct : B. reduces earth capacitance of the lowest unit
93. If the capacitance between two conductors of a 3 phse line is 4
Correct : B. 4
94. The calorific value of lignite is expected to be around
Correct : B. 5000 kcal/kg
95. Metals approach superconductivity condition
Correct : D. near absolute zero
96. Diesel locomotives in India are manufactured at
Correct : A. Varanasi
97. Low utilization factor for a power plant indicates that
Correct : C. plant is used for standby purpose only
98. Which relay is used on transmission lines?
Correct : C. MHO relay
99. Which distribution system is more reliable?
Correct : A. Ring main system
100. All of the following places are associated with oil refineries EXCEPT