RES UNIT 5 MCQ PDF

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UNIT 5 1. How is OTEC caused? a) By wind energy b) By geothermal energy c) By solar energy d) By gravitational force Answer: c

2. What does OTEC stand for? a) Ocean thermal energy cultivation b) Ocean thermal energy conversion c) Ocean techno energy conservation d) Ocean thermal energy consumption Answer: b

3. Which country has world’s largest tidal power plant? a) Netherlands b) South Korea c) Laos d) Bolivia Answer: b

4. Which type of turbine is commonly used in tidal energy?

a) Francis turbine b) Kaplan turbine c) Pelton wheel d) Gorlov turbine Answer: b

5. How is water trapped from coastal waters? a) By building canals b) By building dams c) By digging wells d) By storing in tanks Answer: b

6. Water to the turbine is allowed through the __________ a) Pipes b) Sluice gates c) Canals d) Pumps Answer: b

7. The tides are rhythmic and constant. a) True b) False

Answer: b

8. For exactly how much time does it take for one tidal cycle? a) 22h, 20min b) 24h, 50min c) 20h, 10min d) 22h, 50min Answer: b

9. What type of tide is it if the difference between high and low tide is greatest? a) Diurnal tide b) Neap tide c) Spring tide d) Ebb tide Answer: c

10. A tide whose difference between high and low tides is least is called as __________ a) Diurnal tide b) Neap tide c) Spring tide d) Ebb tide Answer: b

11. Which of the turbine can be mounted vertically and horizontally? a) Pelton wheel b) Kaplan turbine c) Gorlov turbine d) Francis turbine Answer: c

12. What types of tides occur when there is so much interference with continents? a) Diurnal tide b) Neap tide c) Spring tide d) Ebb tide Answer: a

13. Tidal power is taken from earth’s __________ tides. a) Sea b) Oceanic c) Other water sources d) River Answer: b

14.The tidal forces are ______________ in gravitational attraction exerted by celestial bodies. a) Aperiodic variations b) Periodic variations c) Continuous d) Discrete Answer: b

15. Due to ________ the bulge is created in the water level. a) weak attraction forces b) Vanderwals forces c) Wave currents d) Strong attraction forces Answer: d

16. The bulge in water will increase the sea level _________ a) Temporarily b) Permanently c) Only for seconds d) Only for a minute Answer: a

17. In how many types the tidal power is generated?

a) 1 b) 2 c) 3 d) 4 Answer: d

18. The kinetic energy is used to make power in __________ method. a) Tidal lagoon method b) Dynamic tidal power c) Tidal barrage method d) Tidal steam generator Answer: d

19. The both potential and kinetic energy is used in _________ method. a) Dynamic tidal power b) Tidal lagoon method c) Tidal barrage method d) Tidal steam generator Answer: a

20. The tidal barrage method uses kinetic energy and tidal lagoon method uses potential energy to produce electricity.

a) True b) False Answer: b

21. The turbines in the tidal steam generator are placed at ___________ of water column. a) Bottom b) Top c) Right side d) Left side Answer: a

22. The potential energy is turned into _________ energy in tidal barrage method. a) kinetic energy b) Mechanical energy c) Chemical energy d) Static energy Answer: b 23. The reservoirs that are similar to the tidal barrages are created in tidal lagoon method and those are called as __________ a) Lagoons b) Wells c) Pots

d) Tanks Answer: a

24. The pumping of lagoon will flatten out the _________ a) Tides b) Power output c) Water d) Low tides Answer: b

25. The ___________ is used for pumping. a) Solar energy b) Tidal energy c) Wind energy d) Static energy Answer: a

26. Kinetic energy that results from the oscillation of water is called ________ a) Wave energy b) Tidal energy c) Ocean thermal energy d) Hydro energy Answer: a

27. How is height of wave determined? a) By wind speed b) By force of wave c) By a immersion scale d) By a floating device Answer: a

28. What does oscillatory motion at ocean produce? a) Microseisms b) Froth c) Disturbance of currents d) Currents Answer: a

29. Waves are caused indirectly by ______ a) Wind energy b) Solar energy c) Geo-thermal energy d) Wave energy Answer: b

30. Select the correct formula of potential energy in wave energy? a) PEA=14ρa2×ggc b) PE = 14ρa2×ggc c) APE=14ρa2×ggc d) PEA=14ρa2 × g Answer: a

31. Select the correct formula of kinetic energy of a wave? a) KEA=14ρa2×ggc b) KE = 14ρa2×ggc c) KE = 14ρa2 d) KEA=14ρa2 Answer: a

32. What are used to reduce to reduce the motion of floats? a) Back pressure b) Tubes c) Damping fins d) Anchor Answer: c

33. From what material is the float (platform) made of _____________ a) Molded plastic

b) Thermocole c) Stainless steel d) Tubes Answer: a

34. A _______ attached to the float moves up and down inside a cylinder. a) chain b) barrel c) piston d) load Answer: c 35. What type of energy is wave energy? a) Non – conventional b) Commercial c) Non – renewable d) Exhaustible Answer: a

36. What is major disadvantage of wave energy? a) It is not efficient enough b) It is available only in ocean c) The harnessing cost is more d) Unstable during high wind pressures

Answer: b

37. Motion of water in a wave is primarily ________ a) Vertical b) Horizontal c) Linear d) Opposite Answer: a

38. How many number of manifolds are part of a platform of floating device? a) 1 b) 2 c) 3 d) 4 Answer: d

39. Which device uses the float which has two motions? a) High level reservoir wave machine b) Dolphin type wave generator c) Hydraulic accumulator d) Float wave power conversion device Answer: b

40. In which wave machine instead of compressing air, the water itself is pressurized? a) High level reservoir wave machine b) Dolphin type wave generator c) Hydraulic accumulator d) Float wave power conversion device Answer: c 41. The ocean thermal energy conversion(OTEC) is uses ___________ a) Energy difference b) Potential difference c) Temperature difference d) Kinetic difference Answer: c

42. OTEC is developed in ___________ a) 1880 b) 1926 c) 1890 d) 1930 Answer: a

43. The OTEC is constructed in __________ a) 1920

b) 1924 c) 1922 d) 1926 Answer: d

44. The by-product of the ocean thermal energy conversion is ____________ a) Hot water b) Cold water c) Chemicals d) Gases Answer: b

45. In ocean thermal energy conversion, the plant pumps the deep cold sea water and do not pump the surface sea water. a) True b) False Answer: b

46. How many types of OTEC plants are there? a) 1 b) 2 c) 3 d) 4

Answer: c

47. Closed cycle systems use the fluid having ___________ a) High boiling points b) Low boiling points c) High viscosity d) low viscosity Answer: b

48. Warm surface sea water is pumped through a ____________ to vaporise the fluid. a) Heat exchanger b) Generator c) Evaporator d) Condenser Answer: a

49. The heat exchanger ___________ the vapour into a liquid which is recycled. a) Condenses b) Heats c) Cools d) Evaporates Answer: a

50. Open cycle OTEC uses ________ surface water directly to make electricity. a) Hot b) Warm c) Cool d) Icy Answer: b

51. In some cases, the steam drives the low pressure turbine attached to the electrical generator. a) True b) False Answer: a

52. The steam leaves the _______ a) Salts b) Aluminium c) Copper d) Silver Answer: a

53. The open cycle system produces ___________ water. a) Desalinated b) Impure

c) Contaminated d) Chlorinated Answer: a

54. In _________ method the sea water enters a vacuum chamber and flash evaporated. a) Closed cycle system b) Open cycle system c) Hybrid OTEC d) Neither closed nor open system Answer: c

55. Depending on the embodiment ____________ technique generate power from hydro electric turbine. a) Closed cycle b) Open cycle c) Hybrid d) Steam lift pump Answer: d

56. Fuel cell converts chemical energy to electrical energy using a reaction that __________ a) eliminates combustion of fuel b) requires combustion of fuel

c) requires no ignition of fuel d) fuel is not required Answer: a

57. Fuel cell performance is not limited by __________ a) First law of Thermodynamics b) Second law of Thermodynamics c) Third law of Thermodynamics d) All three laws are applicable Answer: b

58. For which of these devices does negative charge carriers flow from anode to cathode in the external circuit? a) MHD generator b) Thermionic generator c) Thermoelectric generator d) Fuel cell Answer: d

59. The fuel cell is considered a battery in which ___________ is continuously replaced. a) fuel only b) oxidizer

c) both fuel and oxidizer d) none of the mentioned Answer: c

60. The type of reactions in a fuel cell is not determined by __________ a) fuel and oxidizer combination b) composition of electrolyte c) materials of anode and cathode d) catalytic effects of reaction container Answer: d 61. What is the voltage output of hydrogen-oxygen fuel cell?(in V) a) -1.23 b) -1.45 c) -1.01 d) -.93 Answer: a 62. What is the voltage output of carbon-oxygen fuel cell?(in V) a) -.91 b) -1.24 c) -1.02 d) -1.17 Answer: c 63. What is the voltage output of methane-oxygen fuel cell?(in V)

a) -1.16 b) -1.06 c) -1.26 d) -0.96 Answer: b

64. Which of these gases or liquids are not used as source of hydrogen in fuel cells? a) C2H6 b) C2H2 c) C6H6 d) C2H5OH Answer: d

65. The hydrocarbons cracked with steam in fuel cells do not give rise to __________ a) CO b) CO2 c) H2 d) H2O Answer: d

66. Which of these should not be a properties of fuel cell electrodes?

a) good electrical conductors b) highly resistant to corrosive environment c) should perform charge seperation d) take part in chemical reactions Answer: d

67. Which of these fuel cell operates at temperature below 100.C? a) phosphoric fuel cell b) solid polymer electrolyte fuel cell c) molten carbon fuel cell d) hydrogen-oxygen fuel cell Answer: c

68. Which of these fuel cells operates at high temperatures and pressures? a) high temperature solid oxide fuel cell b) alkaline fuel cell c) molten carbon fuel cell d) phosphoric acid fuel cell Answer: c

69. What is tidal power? a) Energy from tides b) Energy from water

c) Energy from moon d) Energy from sun Answer: a

70. Which of the following categories does tidal power fall into? a) Hydrothermal b) Hydropower c) Solar d) Wind Answer: b

71. How many basins does a single pool tidal system have? a) 1 b) 2 c) 3 d) 4 Answer: a

72.. How much energy is estimated as total tidal power that is generated throughout the world? a) 2.4 X 106 MW b) 8.3 X 106 MW c) 4.9 X 106 MW

d) 12 X 106 MW Answer: a

73. What is time period for one tide to occur in a day? a) 6h, 12.5 min b) 6h, 40.5 min c) 6h, 0 min d) 6h, 25.6 min Answer: a

74. How many high peaks occur in a single pool tidal system? a) 1 b) 2 c) 3 d) 4 Answer: b

75. What happens if the turbine generators are smaller and operate much longer? a) Resulting work is reduced b) High power generation c) Less power loss d) Less sound is created

Answer: a 76. On what is two-pool tidal system is less dependent? a) Barrage b) Tidal fluctuation c) Reservoir d) Gravitational force Answer: b

77. How much must be the tidal range over barrage to be feasible? a) 7 meters b) 25 meters c) 10 meters d) 20 meters Answer: a 78. Any location where the fresh water meets salty water is called _________ a) Dredging b) River c) Delta d) Estuary Answer: d

79. What tide of tide is it called when two high tides and two low tides of approximately equal size occur?

a) Diurnal tide b) Spring tide c) Neap tide d) Semi-Diurnal tide Answer: d

80. Difference between water height at high tide and water height at low tide is called _______ a) Tidal Variation b) Tidal volume c) Tidal Range d) Tidal Current Answer: c

81. What is the movement of water generated by or associated with the change in mean sea level called? a) Tidal Variation b) Tidal volume c) Tidal Range d) Tidal Current Answer: d

82. What is the movement of water away from the shore called?

a) Flood tide b) Spring tide c) Ebb tide d) Neap tide Answer: c

83. What is the term used for transport of non-cohesive sediments? a) Dirt drop b) Flick c) Littoral drift d) Droplet drifts Answer: c

84. Name the process of excavation activity usually carried underwater of purpose of gathering up bottom sediments. a) Police drag b) Dredging c) Auger suction d) Anti-eutrophication Answer: b

85. One Terra-watt is equal ______________ a) 1 trillion-watts

b) 100 trillion-watts c) 5 trillion-watts d) 10 trillion-watts Answer: a

86. Tidal energy is a form of ________ a) Wind power b) Solar power c) Heat energy d) Hydro power Answer: d

87. Tidal energy has ________ for future electricity generation. a) Kinetic energy b) Potential c) Wind power d) Solar power Answer: b

88. Which of the following is the best form of energy that can be used at any time? a) Wind energy b) Solar energy c) Tidal energy

d) Heat energy Answer: c

89. The worlds large scale tidal power plant is __________ a) Rance tidal power plant b) Uldolmok tidal power plant c) Kislaya guba tidal power plant d) Jiangxia tidal power plant Answer: a

90. The oceanic tides are due to __________ a) Heavy Winds b) Slight earth quakes c) Water force d) Gravitational interaction Answer: d

91. Tidal power is practically _________ a) Exhaustible b) Inexhaustible c) Not possible d) Complicated Answer: b

92. Movement of tides causes the loss of _________ in earth moon system. a) Static energy b) Frictional energy c) Mechanical energy d) Kinetic energy Answer: c

93. The loss of mechanical energy due to movement of tides in earth moon system causes the rotation of earth _______ a) Slow b) Fast c) Very fast d) Remains same Answer: a

94. The slow down of earth’s rotation due to the loss of mechanical energy of earth moon system is since _______ years from earth’s formation. a) 1 billion b) 2.5 billion c) 3.5 billion d) 4.5 billion

Answer: d

95. During the last 620 billion years, the earth’s period of rotation is ________ than that of the rotation of earth since its formation. a) Faster b) Slower c) Very faster d) No change Answer: b

96.Which is the type of energy where the energy is harnessed by the heat accumulated on the surface of water? a) Wind energy b) Wave energy c) Ocean thermal energy conversion d) Solar energy Answer: c

97. Water _________ decreases with an increase in temperature. a) volume b) density c) pressure d) force

Answer: b

98. How many essentially infinite heat reservoirs are present in tropical waters? a) 1 b) 2 c) 3 d) 4 Answer: b

99. Who first recognized the OTEC? a) d’Arsonval b) Alexander Edmond Becquerel c) James Prescott joule d) LA Rance Answer: a

100. From which cycle does maximum possible efficiency of a heat engine operating between two temperature limits cannot exceed? a) Carnot cycle b) Otto cycle c) Open cycle d) Anderson cycle Answer: a

101. Which of the following has the lowest efficiency? a) Solar energy b) Wind energy c) Wave energy d) OTEC Answer: d

102. The Claude cycle is also called as __________ a) Open cycle b) Anderson cycle c) Closed cycle d) Otto cycle Answer: a

103. Anderson cycle is also known as _________ a) Open cycle b) Claude cycle c) Closed cycle d) Otto cycle Answer: c

104. Who proposed closed cycle approach?

a) Barjot b) Alexander Edmond Becquerel c) James Prescott joule d) LA Rance Answer: a

105. The working fluid chosen by Anderson OTEC cycle is ______ a) Propane b) Water c) Engine oil d) ISO-butane Answer: a

106. Which is the working fluid in open cycle? a) Propane b) Water c) Engine oil d) ISO-butane Answer: b

107. A continuous movement of water in specific direction is called as _________ a) float

b) waves c) current d) tides Answer: d...