1) The solar radiation received directly from the sun is: a. Beam radiation b. Scattered radiation c. Diffuse radiation d. Reflected radiation
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2) The air mass will be one: a. At Zenith b. At 60? to Zenith c. Above earth's atmosphere d. None of these
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3) An angular distance of the sunrays north (or south) of the equator is: a. Latitude angle b. Hour angle c. Declination d. Inclination
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4) A vertical between the projection of the sun's rays on the horizontal plane and direction of sun's rays is: a. Zenith angle b. Solar altitude c. Solar angle d. Latitude angle
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5) Equinox means: a. Equal days b. Equal nights c. Equal day and night d. Equator
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6) A angle through which the Earth must turn to bring the meridian of a point directly in time with sunrays is: a. Altitude angle b. Zenith angle c. Hour angle d. Solar azimuth angle
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7) The process of removing husk and bran of the paddy in one: operation is called: a. Hulling b. Shelling c. Milling d. All are correct
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8) The process of removing husk and hull from the paddy grain is known as: a. Shelling b. Milling c. Husking d. All are correct
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9) In rubber roll huller breakage is: a. Less b. More c. No breakage d. None of these
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10) In rubber roll huller the rubber rolls turn at: a. Same speed b. Different speed and different directions c. Air to grain d. All are correct
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11) In forced air-dring method the moisture moves from: a. Grain to air b. Centre to grain surface c. Air to grain d. All are correct
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12) The drying process involves: a. Heat transfer b. Mass transfer c. Heat and mass transfer d. None of these
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13) In thin layer drying, the depth of grain layer should be: a. 20 cm b. Less than 20 cm c. More than 20 cm d. None of these
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14) Thing layer drying includes: a. Batch type dryer b. LSU dryer c. Flat bed dryer d. All are correct
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15) Deep bed drying includes: a. Baffle dryer b. Batch dryer c. LSU dryer d. None of these
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16) In deep bed drying, the depth of grain layer is: a. 10 cm b. 20 cm c. Less than 20 cm d. More than 20 cm
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17) A sack dryer is suitable for drying: a. Small quantity of grain b. Large quantity of grain c. Any quantity of grain d. None of these
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18) In batch type dryer, the maximum depth of grain is about: a. 200 cm b. 225 cm c. 250 cm d. 300 cm
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19) In batch type dryer the minimum airflow rate required for drying per cubic metre of paddy is: a. 2-3 cu m/min b. 3-4 cu m/min c. 4-5 cu m/min d. 4-6 cu m/min
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20) In rotary dryer, the diameter of drum ranges between: a. 2-4 metres b. 3-5 metres c. 3-6 metres d. 4-8 metres
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21) Vertical interval of bench terrace depends on: a. Land slope b. Soil depth c. Both (a) & (b) d. None of these
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22) The capacity of RPEC dryer is about: a. Half tonne per hour b. One tonne per hour c. Two tonne per hour d. All are correct
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23) LSU dryer was developed in/at: a. 1949 (USA) b. 1950 (England) c. 1965 (Japan) d. None of these
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24) The main advantage of LSU dryer is: a. Shorter drying period b. Maximum drying capacity c. Minimum drying losses d. All are correct
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25) For LSU dryer, the recommended airflow rate is: a. 50 cu m/min/tonne b. 60 cu m/min/tonne c. 70 cu m/min/tonne d. 80 cu m/min/tonne
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26) LSU dryer is: a. Batch type dryer b. Continuous flow type dryer c. Continuous flow mixing type dryer d. Continuous flow non-maxing type dryer
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27) The radiation of equilibrium relative humidity with moisture content of grain at a particular temperature is expressed by a curve known as: a. Grain isotherm b. Relative humidity c. Equilibrium moisture content d. All are correct
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28) In drying process, the heat required to convert one kilogram of grain moisture to water vapour is: a. 450 kcal b. 500 kcal c. 550 kcal d. 650 kcal
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29) The optimum moisture content (wb) for paddy harvesting is: a. 12-15% b. 15-18% c. 18-20% d. 20-22%
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30) The optimum moisture content (wb) for wheat harvesting is: a. 12-14% b. 14-16% c. 16-18% d. 18-20%
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31) The percentage of hull in paddy grain is about: a. 15 % by weight b. 16 % by weight c. 18 % by weight d. 20% by weight
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32) The percentage of protein by weight in pulse is: a. 15-20% b. 17-5% c. 18-27% d. 20-30%
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33) The density and specific gravity of grain is essential for: a. Calculating the thermal diffusivity b. Determining the Reynods' number c. Pneumatic and hydraulic handling d. All are correct
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34) The yardstick of sharpness of solid materials is: a. Roundness b. Spherisity c. Terminal velocity d. Drag coefficient
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35) Geometrical mean diameter of particles are known as: a. Specific diameter b. Equivalent diameter c. Geometric diameter d. None of these
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36) Specific gravity of grains is determined by: a. Pycnometer b. Specific gravity bottle c. Both (a) and (b) d. None of these
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37) The density of wheat is about: a. 850-100 kg/m3 b. 998-1238 kg/m3 c. 1150-1300 kg/m3 d. 1200-1450 kg/m3
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38) Terminal velocity of wheat grain is: a. 8-10 m/s b. 9-11.5 m/s c. 10-12.5 m/s d. 10-13 m/s
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39) The frictional force acting between the surfaces of contact at rest with respect to each other is called: a. Dynamic friction b. Static friction c. Kinetic friction d. None of these
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40) The friction forces existing between the surfaces in relative motion is called: a. Static friction b. Coefficient of friction c. Kinetic friction d. Angle of internal friction
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41) Angle of repose for paddy ranges between: a. 25-30 degree b. 30-40 degree c. 30-45 degree d. 35-50 degree
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42) The value of angle of repose for wheat is between: a. 18-23 degree b. 23-28 degree c. 28-33 degree d. 33-38 degree
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43) The value of angle of repose for millets is about: a. 15-20 degree b. 20-25 degree c. 25-30 degree d. 30-35 degree
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44) The amount of heat in kilocalorie the must be added to or removed from one kg of substances to change its temperature by one degree is: a. Latent heat b. Specific heat c. Enthalpy d. Entropy
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45) Cleaning of material is done by: a. Washing b. Screening c. Handpicking d. All are correct
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46) The removal of few large particles in an initial process is: a. Scalping b. Cleaning c. Grading d. Sorting
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47) Cleaning of material is done on the basis of: a. Shape b. Size c. Weight d. Density
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48) In the cylinder sorter, the inclination of cylinder for dry granular material is kept up to: a. 75 mm/mb b. 100 mm/m c. 125 mm/m d. 150 mm/m
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49) Disc separator separates materials on the basis of: a. Length b. Width c. Weight d. Shape
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50) Indented cylinder separator separates the grains on the basis of: a. Weight b. Relative length c. Length d. All are correct
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51) Spiral separator separates the grains on the basis of: a. Weight b. Spherisity c. Roundness d. Size
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52) Specific gravity separator makes the separation as per difference in: a. Density b. Shape c. Roughness d. Relative length
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53) Specific gravity separator works on the principle of: a. Characteristics of grain to flow down over an inclined surface b. Flotation of the particles due to upward movement of air c. Both (a) and (b) d. None of these
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54) The shape of perforated deck used in specific gravity separator is: a. Triangular b. Rectangulr c. Circular d. Hexagonal
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55) In inclined draper, the major factor causing the separation of grain is: a. Shape and size b. Shape and surface texture c. Shape and weight d. Weight and size
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56) The major controlling factor in separation of grain by fluidized bed separator is: a. Air velocity and weight of grain b. Shape and size of grain c. Shape and texture of grain d. Magnetic and arodynamic properties of grain
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57) Fluidized bed separator used to separate the seed is: a. Lighter seeds b. Medium seeds c. Heavier seeds d. All kinds of seeds
|
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58) The separation of grain in magnetic separator is carried out on the basis of: a. Specific gravity b. Surface texture c. Roundness d. Relative length
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59) Cyclone separator works on: a. Centrifugal force b. Fravity force c. Inertia force d. None of these
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60) Contour trenching is done mainly in: a. Low rainfall areas for moisture conservation b. High rainfall areas for moisture conservation c. Arid zones for wind erosion control d. All are correct
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