1. Which of the following should not be the characteristic of the solar cell material?
Correct : C. high energy band
2. Which of the following region is coated with a metal?
Correct : A. a
3. What does Heating and cooling of the atmosphere generates?
Correct : C. convection currents
4. How much is the energy available in the winds over the earth surface is estimated to be?
Correct : B. 1.6 x 107 mw
5. 6 X 107 MW which is almost the same as the present day energy consumption. Wind energy can be utilized to run wind mill which in turn, is used to drive the generators.
Correct : A. 20,000 mw
6. Which country created wind mills?
Correct : C. iran
7. “During the day, the air above the land heats up more quickly than the air over water”.
Correct : A. true
8. What happens when the land near the earth’s equator is heated?
Correct : D. large atmospheric winds are created
9. What type of energy is wind energy?
Correct : A. renewable energy
10. What are used to turn wind energy into electrical energy?
Correct : A. turbine
11. What is the diameter of wind turbine blades?
Correct : B. 220 feet
12. At what range of speed is the electricity from the wind turbine is generated?
Correct : D. 30-35 mph
13. When did the development of wind power in India began?
Correct : C. 1990
14. A fuel cell is used to convert chemical energy into
Correct : C. electrical energy
15. Select the incorrect statement from the following option.
Correct : D. the noise levels of fuel cells are high
16. and suitable catalyst are required to promote high rate of electrode processes.
Correct : B. higher temperature
17. Fuel cells are free from vibrations, heat transfer and thermal pollution.
Correct : A. true
18. Which of the following is not an example of a fuel cell?
Correct : D. hexanone-oxygen cell
19. The electrolytic solution used in a hydrogen-oxygen fuel cell is
Correct : B. 25% koh solution
20. The standard emf of the hydrogen-oxygen fuel cell is
Correct : A. 1.23 v
21. The residual product discharged by the hydrogen-oxygen cell is
Correct : C. water
22. Hydrogen-oxygen fuel cell can produce drinking water of potable quality.
Correct : A. true
23. Capacitor stores which type of energy?
Correct : C. potential energy
24. Capacitor blocks after long time.
Correct : B. direct current
25. Why does capacitor block dc signal at steady state?
Correct : D. due to zero frequency of dc signal
26. 77*10-11 C. What is the voltage across the capacitor?
Correct : A. 1v
27. Which of the following is a passive device?
Correct : C. capacitor
28. What is the value of capacitance of a capacitor which has a voltage of 4V and has 16C of charge?
Correct : B. 4f
29. For which medium capacitance is high?
Correct : D. metal
30. Alkaline hardness is due to the presence of bicarbonate, carbonate and hydroxides of the hardness-producing metal ions.
Correct : A. true
31. The colour of dye metal complex and dye are
Correct : B. different
32. of zeolite.
Correct : C. 35,000-40,000
33. m2
Correct : A. 112
34. m3/h. Feed flow : 635 m3/h.
Correct : B. 85%
35. 5 and C = 0.04.
Correct : C. 0.040
36. If a reaction is nth order the half-life period of the initial concentration of the reactants.
Correct : B. varies inversely as (n-1)th power
37. The elementary processes with molecularity greater than are not known.
Correct : C. 3
38. SO2 + O2 ⟶ 2SO3
Correct : B. nitrous oxide
39. + 3H2 ⟶ 2NH3
Correct : C. platinum
40. O2 ⟶ 2H2O + O2
Correct : C. platinum
41. + O2 ⟶ 2SO3
Correct : A. platinum
42. C=12
Correct : D. 10
43. = K +α′ S]
Correct : B. inhibitor
44. What is Gibbs phase rule for general system?
Correct : D. p + f = c + 2
45. atm Temperature: 1oC
Correct : C. 1
46. Which of the following compound is considered for calculating the octane number?
Correct : C. iso-octane
47. For best results of efficient combustion, high speed diesel engines need an approximate cetane number of
Correct : C. 50
48. The most popular firing order in case of four cylinder in-line I.C. engine is
Correct : D. 1-3-4-2
49. The compression ratio of motor cars is
Correct : B. 7
50. The efficiency of I.C. engines normally is of the order of
Correct : D. 30-35%
51. The firing order of a six stroke I.C. engine is
Correct : D. 1-5-3-4-2-6
52. Sulphur content in diesel engine oil should not be more than
Correct : C. 1%
53. Which of the following is a major advantage of gaseous fuel over liquid and solid fuel?
Correct : A. gaseous coal does not form ash
54. Disadvantage of hydrogen as a fuel in IC engine is
Correct : C. detonating tendency
55. Major disadvantage of LPG as fuel in automobiles is
Correct : C. all of the mentioned
56. Hydrogen gas has self- ignition temperature.
Correct : B. very high
57. The energy content of air hydrogen mixture is than liquid hydrocarbon fuels.
Correct : A. lower
58. CNG has high auto-ignition temperature of
Correct : A. 813k
59. The rating of a diesel engine, with increase in air inlet temperature, will
Correct : B. decrease linearly
60. The knock in diesel engine occurs due to
Correct : A. instantaneous and rapid burning of the first part of the charge
61. Volatility of diesel fuel is
Correct : C. indicated by 90% distillation temperature
62. Violent sound pulsations within the cylinder of an I.C. engine are caused due to
Correct : C. detonation
63. The delay period in petrol engine is of the order of
Correct : B. 0.002 sec
64. In order to prevent knock in the S.I. engines, the charge away from the spark plug should have
Correct : D. all of the mentioned
65. To reduce the possibility of knock in C.I. engines, the first elements of fuel and air should have
Correct : D. all of the mentioned
66. The detonation tendency in petrol engines for specified conditions of fuel rating, compression ratio, speed etc, can be controlled by having
Correct : A. smaller cylinder bore
67. A fuel will detonate less if it has
Correct : A. higher self ignition temperature
68. Which of the following compound other than CO2, CO an O2 can be determined by the flue gas analysis?
Correct : A. c2h6
69. Why neutrons with lower energy should be capable of causing fission?
Correct : B. for sustained reaction process
70. In economics of nuclear power plant taxes and insurance charges are taken as
Correct : D. fixed cost
71. O + CO2 →
Correct : A. ch2o + o2
72. The principle of a solar cell is same as the photodiode.