2. A simple Rankine cycle operates the Boiler at 3 MPa with an outlet temperature of 350°C and the Condenser at 50 kPa. Assuming ideal operation and processes, what is the thermal efficiency of this cycle?
Correct : C. 27.7
3. On what basis are fire and water tube boilers are classified?
Correct : D. depending tubular heating surface
4. Cornish boiler is an example of which type of boiler?
Correct : A. fire tube boiler
5. Stirling boiler is an example of which type of boiler?
Correct : D. water tube boiler
6. Which of these is a stationary boiler?
Correct : D. babcock-wilcox boiler
7. Which of these is a mobile boiler?
Correct : C. locomotive boiler
8. Are boilers defined on the basis of heat source.
Correct : A. yes
9. What is the steam pressure limit of natural circulation boilers?
Correct : B. 180bar
10. Which of the given boilers operate above critical pressure?
Correct : C. once-through boilers
11. Which type of boilers are called drum-less boilers?
Correct : C. positive forced circulation boiler
12. Chances of sediments depositing inside the water tubes in the shell is less due to?
Correct : D. high working pressure
13. Out of the given option choose the advantage that supports fire tube boilers?
Correct : C. water circulation is limited inside boiler shell
14. Apart from feedheating, what should a plant have to obtain a gain in thermal efficiency?
Correct : C. reheating cycles
15. Which of the following needs to be incorporated to prevent the low pressure turbine exhaust wetness from being excessive?
Correct : C. double reheat
16. What is the critical point of steam generation in a “once through” boiler?
Correct : D. 221.2 bar
17. In a typical layout of a 215MW reheat power plant, the feed in the boiler is at?
Correct : C. 238 degree centigrade
18. The input to the low pressure feedwater heater is from?
Correct : B. drain cooler
19. The best capable alternative source which can meet the future energy demand is
Correct : B. nuclear power plant
20. How much coal is required to generate energy equivalent to the energy generated by 1 kg of uranium?
Correct : D. 3000 tonnes of high grade coal
21. Nuclear fuel in reactor lasts for
Correct : D. more than 5 years
22. Cost of nuclear fuel in nuclear power plant economics is considered as
Correct : C. capital cost
23. Which of the following are not taken as operation and maintenance cost in economics of nuclear power plant?
Correct : A. taxes and insurance
24. What is the overall efficiency of nuclear power plant?
Correct : C. 30 to 40 %
25. The land area required for installation of nuclear power plant is
Correct : C. equel to thermal power plant
26. All of the nuclear fuel reserve will be ended in about 400 years.
Correct : B. false
27. With respect to the load centre which location is suitable for stablishment of nuclear power plant?
Correct : B. near load centre but at reasonable distance
28. Operating cost of nuclear power plant is less than thermal power plant.
Correct : A. true
29. What is the role of breaker house in coal feeding?
Correct : C. to separate the light dust from the coal
30. Large amount of coal is transported by
Correct : A. railway
31. The coal is fed to the furnace through
Correct : C. hopper
32. What is the function of cyclone separators in pneumatic ash handling system?
Correct : A. to separate the lighter dust particles
33. Which medium is used to carry ash in the pneumatic ash handling system?
Correct : C. air
34. Which system is noisy out of all the following ash handling systems?
Correct : C. pneumatic ash handling system
35. Which medium is used to carry ash in hydraulic system?
Correct : B. water
36. What would be the amount of distance that a low pressure system could carry the ash?
Correct : B. 500m
37. What is the capacity of low pressure hydraulic ash handling system?
Correct : C. 50 tonnes/hour
38. Which of these terms defines the pressure difference in the furnace?
Correct : A. draught
39. 6 DRAUGHT SYSTEM
Correct : A. Δp = gh(ρa-ρg)
40. Which of these is not a type of mechanical draft system for a furnace?
Correct : D. actuated draft
41. Stack heat losses can be minimised by
Correct : B. controlling the excess air
42. Which of these accentuates clinkering trouble on furnace grate burning coal?
Correct : D. all of the mentioned
43. In a furnace employing forced draught compared to induced draught
Correct : C. air is sucked in, so air leaks are more and hence furnace efficiency is reduced
44. Which of the following types of the fans has the highest cost?
Correct : B. axial fans
45. Which of these is not a type of drive of variable speed control?
Correct : D. electronically adjustable turbine drive
46. Feed water for boiler of thermal power plant is obtained from:
Correct : C. condensed steam and small percentage from natural resources
47. Mechanical method of water treatment is done to
Correct : B. to remove solid matter and impurities
48. Which method is used in large modern thermal power plants to heat feed water?
Correct : C. steam is directly taken from main turbine and used to heat it feed water
49. Thermal treatment methods used to remove impurities like:
Correct : A. dissolved carbon dioxide and other gases
50. Chemical method of treatment is used for treatment of:
Correct : B. carbonate and carbon dioxide
51. A plant producing both, electrical power & process heat simultaneously is?
Correct : C. cogeneration plant
52. In a back pressure turbine
Correct : A. pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process
53. In a by-product power cycle?
Correct : C. power production is after the cycle has ended
54. In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are?
Correct : B. cheaper
55. Which of the following is a good medium for constant temperature heating?
Correct : B. steam
56. If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by?
Correct : A. (1 / m) + ((1 – e) / n)
57. Which of these is not considered economical for cogeneration?
Correct : B. a low fraction of electric to total energy
58. Which of these is a working fluid in the bottoming plant of a Brayton-Rankine combined plant?
Correct : C. water
59. What would be the temperature of the gas in the combustion chamber?
Correct : B. 1600 °c
60. What is regeneration?
Correct : B. transfer of heat energy from exhaust gases to the compressed air flowing between compressor and the combustion chamber
61. What is meant by inter cooling?
Correct : A. removal of heat from compressed air between stages of compression
62. What is the air standard cycle for a Gas- Turbine called?
Correct : C. brayton cycle
63. Power is produced when the working fluid does some work on the?
Correct : C. blades
64. A Gas Turbine is which type of combustion plant?
Correct : C. internal
65. Which type of compressor is used in a gas turbine plant?
Correct : C. multistage axial flow compressor
66. What part or % of power developed is utilised for driving the compressor?
Correct : A. 65 %
67. The gas turbine power plant mainly uses which among the following fuels?
Correct : D. natural gas and liquid petroleum fuel
68. The maximum steam temperature in a
Correct : A. 600
69. The temperature in a dry bottom pulverised coal furnace, in degree Celsius is about?
Correct : B. 1300
70. What happens to the availability in a combined cycle plant?
Correct : A. decreases
71. Which of the following is not a type of Combined Plant?
Correct : A. sodium- mercury-potassium plant
72. Which of these is not a component of nuclear reactor?
Correct : B. refractor
73. What efficiencies of thermionic power generator have been realised?
Correct : C. 10-20%
74. In economics of nuclear power plant taxes and insurance charges are taken as
Correct : D. fixed cost
75. PWR stands for
Correct : C. pressurized water reactor
76. What does the top of the pressurizer in pressurized water reactor consists of at primary system pressure?
Correct : A. steam
77. Select the incorrect statement which supports PWR.
Correct : C. uses natural fuel
78. Select the incorrect statement about PWR.
Correct : B. corrosion is less in pwr
79. LWR stands for
Correct : D. light water reactor
80. In which reactor is the coolant in direct contact with the heat producing nuclear fuel?
Correct : C. boiling water reactor
81. How many types of Boiling water reactor cycles are there?
Correct : B. 3
82. Which country invented CANDU heavy water reactor?
Correct : A. canada
83. CANDU stands for
Correct : B. canadian natural deuterium uranium
84. Which reactor consists of both fertile and fissile material?
Correct : A. fast breeder reactor
85. What is acronym of LMFBR?
Correct : B. liquid metal fast breeder reactor
86. GCFBR stands for
Correct : B. gas cooled fast breeder reactor
87. Using Helium gas in GCFBR has many advantages.
Correct : A. true
88. Which reactor uses orthometaerhenyl and paratherphenyl as coolant and moderator?
Correct : C. organic substance cooled reactor
89. Nuclear plant is located near the area where cooling water is available.
Correct : A. true
90. Which of the following may be used to measure the rate of nuclear disintegration?
Correct : A. geiger-muller counter
91. Which of the following may not need a moderator?
Correct : B. fast breeder reactor
92. Which of the following is not a naturally occurring nuclear fuel?
Correct : C. plutonium-239
93. One amu is equivalent to?
Correct : A. 931 mev
94. Fast breeder reactors do not
Correct : C. use th-232 as fissile fuel
95. A boiling water reactor is the one, in which the
Correct : D. coolant water is allowed to boil in the core of the reactor
96. Commercial power generation from fusion reactor is not yet possible, because
Correct : C. it is difficult to control fusion reaction
97. Thermal shield is used in high powered nuclear reactors to
Correct : B. protect the walls of the reactor from radiation damage
98. Where was the first control fission of an atom carried out?
Correct : D. germany
99. Which was the first country to develop an atomic bomb?