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1) In fixed dome type biogas plant, the gas holder is made of: a. Metal b. Cement and bricks c. Wooden d. Stone
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2) In floating type biogas plant, gas holder is made of: a. Metal b. Wood c. Cement and bricks d. All are correct
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3) Which of the biogas plant has digester tank and gasholder as combined unit? a. Floating dome type b. Fixed dome type c. Both (a) & (b) d. None of these
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4) Insulated metal of solar cooker is: a. Black from outside b. Black from inside c. Black from out and inside d. White from out and inside
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5) A mirror used to reflect sublight in box type solar cooker is: a. Convex b. Concave c. Plane d. All are correct
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6) Which of the following items utilizes direct energy of sun: a. Solar heater b. Solar cooker c. Solar cell d. All are correct
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7) The use of reflector in solar heating devices is to: a. Increase efficiency b. Decrease efficiency c. Create greenhouse effect d. None of these
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8) A group of solar cell is: a. Solar cap b. Solar panel c. Solar node d. All are correct
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9) Chute spillways are used at: a. Mild slope b. Steep slope c. Both (a) & (b) d. None of these
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10) Chute spillways are constructed at: a. Gully head b. Along the gully bed c. Both (a) & (b) d. None of these
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11) Downstream section of straight drop spillway is called as: a. Apron b. Stilling basin c. Both (a) & (b) d. None of these
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12) An instrument used for measuring the solar radiation is: a. Thermometer b. Pyrheliometer c. Thermocouple d. All are correct
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13) An instrument, which measures the total or global radiation over a hemispherical field of view is: a. Pyranometer b. Thermister c. Thermocouple d. Thermometer
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14) Contour trenching is performed to: a. Control the landslide from the hill face b. Conserve the moisture c. Both (a) & (b) d. None of these
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15) A vertical angle of the projection of sun's rays on the horizontal plane and direction of sun's rays is called: a. Zenith angle b. Altitude angle c. Hour angle d. Incident angle
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16) Flate plate collector is generally used for: a. Room heating b. Water heating c. Lighting d. All are correct
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17) Of the following solar air heater is applicable in: a. Heating buildings b. Drying of agriculture products c. Air-conditioning of buildings d. All are correct
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18) Wind energy is a form of: a. Solar energy b. Wave energy c. Biogas energy d. Ocean energy
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19) The energy wind is converted into: a. Chemical energy b. Mechanical energy c. Electrical energy d. Biomass energy
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20) In a windmill, tip speed ratio increases with: a. Increase of number of blades b. Decrease of number of blades c. Independent of blade number d. None of these
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21) An instrument used to measure wind speed is: a. Dynamometer b. Anemometer c. Hygrometer d. Thermometer
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22) Hot magma is a source of: a. Solar energy b. Wind energy c. Geothermal energy d. Tidal energy
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23) Contour trenches are constructed: a. On contour of the land b. Not on the contour of the land c. Along the land slope d. All are correct
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24) Heat flow in the ground is measured in bore holes to a depth of about: a. 25 metres b. 50 metres c. 75 metres d. 100 metres
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25) One heat flow unit is equal to: a. 10-6 cal/cm2/sec b. 10-8 cal/cm2/sec c. 10-9 cal/cm2/sec d. 10-8 cal/cm2/sec
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26) According to US geological survey, geothermal energy is all heat stored in the earth's crust above 15?C to a depth of: a. At 10 Km b. Below 10 Km c. Above 10 Km d. All are correct
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27) Geothermal energy from the earth's interior is: a. Exhaustible b. Inexhaustible c. Non-renewable d. None of these
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28) Todal power is dissipated by: a. Friction b. Eddies current c. Both (a) & (b) d. None of these
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29) The tides in a period of 24 hours 50 minutes are: a. One high and one low b. One high and two low c. Two high and two low d. Two high and one low
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30) The neap tides occurs when: a. Sun is at right angle with respect to the earth b. Moon is at right angle with respect to the earth c. Sun and moon are at right angle with respect to the earth d. None of these
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31) The gradient for generation of power by heat engine in OTEC plant utilizes a. Pressure gradient b. Temperature gradient c. Moon gradient d. None of these
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32) The fossil fuel is: a. Coal b. Natural gas c. Oil d. All are correct
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33) Calorific value of coal is about: a. 2000 kcal/kg b. 4600 kcal/kg c. 6300 kcal/kg d. 8300 kcal/kg
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34) Calorific value of natural gas ranges between: a. 10-15 Kj/kg b. 20-30 Kj/kg c. 33.50 KJ/kg d. 50-75 KJ/kg
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35) Calorific value of hydrogen gas is: a. 50 KJ/kg b. 100 KJ/kg c. 150 KJ/kg d. 180 KJ/kg
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36) Solar energy can be directly converted into electrical energy, by a method is: a. Thermoelectric b. Thermionic c. Magneto hydrodynamic d. All are correct
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37) Shoulder bounds are provided to: a. Retain the runoff over benches b. Provide stability to the outer edge of bench c. Both (a) & (b) d. None of these
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38) The first nuclear power station came into operation (1957) at: a. IEA b. England c. Germany d. China
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39) In biogas plant digestion (biological process) occurs in absence of: a. Oxygen b. Carbon dioxide c. Hydrogen d. Methane
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40) Biogas is a mixture of: a. Methane and carbon dioxide b. Ethane and carbon dioxide c. Ethane and methane d. Ethane and carbon mono oxide
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41) The optimum C:N ratio for maximum microbiological activities is: a. 10;1 b. 15;1 c. 25;1 d. 30;1
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42) The gas production per unit volume of digester capacity will be maximum when the diameter to depth ratio of digester will be in the range of: a. 0.66 to 1.00 b. 0.75 to 1.20 c. 0.85 to 1.30 d. 0.90 to 1.40
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43) Solar radiation reaches the earth in the form of: a. Beam radiation b. Defuse radiation c. Beam and defuse radiation d. None of these
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44) Temperature attainable with concentrating collector as compared to flat plate collector is: a. Lower b. Higher c. Equal d. None of these
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45) According to NASA, a standard value for solar constant is: a. 1.353 kW/m2 b. 1.533 kW/m2 c. 1.755 kW/m2 d. 1.850 kW/m2
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46) Thermal efficiency of Magneto hydrodynamic system is about: a. 40-45.0 b. 50-55 c. 60-65% d. 70-75
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47) Ocean waves contain: a. Kinetic energy b. Potential energy c. Static energy d. All are correct
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48) A contribution of hydropower in total world evergy power is about: a. 6% b. 8% c. 111% d. 12%
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49) The amount of solar energy reaching a specific location on the surface of the earth at a specific time: a. Solar constant b. Insulation c. Solar radiation d. None of these
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50) If the pH range of slurry is between 4 and 6 the slurry is: a. Acidic b. Alkaline c. Alkaline d. None of these
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51) The proportion of wet cow dung and water in slurry seed to the digester is a. 1;1 b. 1;2 c. 1;3 d. 1;4
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52) The quantity of gas produced by one kg of dry dung is about: a. 0.156 m3 b. 0.160 m3 c. 0.175 m3 d. 0.186 m3
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53) In a 30 days of retention period, the production of gas/kg of fresh dung is: a. 0.04 m3 b. 0.05 m3 c. 0.06 m3 d. 0.08 m3
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54) Biogas can be used to operate: a. SI engine b. CI engine c. Both SI and CI engine d. Not possible to operate engine
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55) Heat value of the gas produced in gas fire is about: a. 950-1200 kcal/m3 b. 1000-1300 kcal/m3 c. 1200-1500 kcal/m3 d. 1500-1800 kcal/m3
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56) In anaerobic digestion, biogas production by bacterial decomposition is: a. Presence of oxygen b. Absence of oxygen c. Presence of CO2 d. Absence of CO2
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57) The wet process of biomass digestion involves: a. Pyrolysis and Gasification b. Hydrogenation and liquefication c. Liquenfication and pyrolysis d. Anaerobic digestion and fermentation
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58) The dry process of biomass digestion involves: a. Pyrolysis and liquenfication b. Anaerobic digestion and fermentation c. Fermentation and pyrolysis d. All are correct
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59) Solar energy reaches top of the earth's surface consist of: a. Ultraviolet radiation b. Infrared radiation c. Visible light d. All are correct
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60) The solar radiation receives from the sun after its direction has been changed is: a. Beam radiation b. Diffuse radiation c. Direct radiation d. All are correct
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