41. A pyrometer can be used for measurement of
(a) diffuse radiations only.
(b) direct radiations only.
(c) both, direct as well as diffuse radiations.
(d) none of the above.
Answer: (c) both, direct as well as diffuse radiations.
42. Wind as a source of power
(a) is non-steady and unreliable.
(b) does not possess the basic requirements of any energy source.
(c) is plentiful, inexhaustible, renewable and non-polluting.
(d) all of the above.
Answer: (d) all of the above.
44. The drawback(s) of wind power plant is/are
(a) unreliability and non-steadiness.
(b) unwieldy size, high structural area and quite large finance requirements.
(c) output voltage and frequency fluctuations.
(d) all of the above.
Answer: (d) all of the above.
45. Maximum wind energy available is proportional to
(a) air density.
(b) cube of the wind velocity.
(c) square of the rotor diameter.
(d) all of the above.
Answer: (d) all of the above.
46. Under favorable conditions, use of wind power for……..is possible.
(a) small sized plants
(b) medium sized plants
(c) large scale generation
(d) (a) or (b).
Answer: (d) (a) or (b).
47. Tidal power schemes, could not be found economically justified because of
(a) high cost of civil engineering works.
(b) non-availability of tidal energy in India.
(c) both (a) and (b).
Answer: (a) high cost of civil engineering works.
48. Tidal energy utilizes
(a) kinetic energy of water.
(b) potential energy of water.
(c) both potential as well as kinetic energy of water.
(d) none of the above.
Answer: (b) potential energy of water.
49. The turbine normally employed in tidal power plants is
(a) simple impulse type.
(b) propeller type.
(c) reaction type.
(d) reversible type.
Answer: (d) reversible type.
50. A tidal power plant is installed in India near
(a) Bay of Bengal.
(b) Visakhapatnam.
(c) Goa.
(d) Gulf of Cambay.
Answer: (d) Gulf of Cambay.
51. Geothermal energy is
(a) inexhaustible energy source.
(b) a renewable energy source.
(c) alternative energy source.
(d) all of the above.
Answer: (d) all of the above.
52. A geothermal field may yield
(a) dry steam.
(b) wet steam.
(c) hot water.
(d) all of the above.
Answer: (d) all of the above.
53. Geothermal steam and hot water may contain
(a) NH3
(b) CO2
(c) H2S
(d) H2S, CO2, NH3 and random gas.
Answer: (d) H2S, CO2, NH3 and random gas.
54. When geothermal energy is available in the form of saline water, power is developed using
(a) binary cycle system.
(b) flashed-steam system.
(c) total flow system.
(d) any of the above.
Answer: (d) any of the above.
55. In hydrothermal source of geothermal energy
(a) hot water or steam is available.
(b) molten lava is available.
(c) hot gases are available.
(d) all of the above.
Answer: (a) hot water or steam is available.
56. A potential geothermal source region should have
(a) low thermal gradient.
(b) high thermal gradient.
(c) high thermal conductivity.
(d) none of the above.
Answer: (b) high thermal gradient.
57. In hydrothermal systems when steam, water and dissolved solids are available as source of energy, the entrained solid are removed by
(a) strainers.
(b) centrifugal separators.
(c) filters.
(d) any of the above.
Answer: (b) centrifugal separators.
58. In comparison to conventional steam power plants geothermal power plants have
(a) lower load factor.
(b) the same load factor.
(c) higher load factor.
(d) unpredictable.
Answer: (c) higher load factor.
59. Presence of sand in geo-pressured water is likely to cause
(a) erosion problem.
(b) water circulation problem.
(c) heat exchange problem.
(d) none of the above.
Answer: (a) erosion problem.
60. Presence of non-condensable gases in geo-pressured water causes
(a) pollution problem.
(b) corrosion problem.
(c) flow problem.
(d) all of the above.
Answer: (d) all of the above.