MPHR 310 Short Questions PDF

# Short Questions in Greenhouse & Drying Technology | S. No. | Question | Answer | |---|---|---| | 1 | Face of the Lean-to type greenhouse generally remains on which side? | South side (to maximize sunlight exposure). | | 2 | Climatic factor maintained artificially in Mist Chamber is | Humidity. |...

# Short Questions in Greenhouse & Drying Technology | S. No. | Question | Answer | |---|---|---| | 1 | Face of the Lean-to type greenhouse generally remains on which side? | South side (to maximize sunlight exposure). | | 2 | Climatic factor maintained artificially in Mist Chamber is | Humidity. | | 3 | Protected structures commonly used for hardening of plants are | Shade nets or low tunnels. | | 4 | Mesh size usually used for effective control of pests and diseases under insect-proof net is | 40-50 mesh. | | 5 | For off-season cultivation of vegetables and flower seedlings, the recommended protected structure will be | Polyhouse or greenhouse. | | 6 | Which type of protected structure is also called as row covers? | Low tunnels. | | 7 | The moisture content at which the constant rate period changes to the falling rate period is known as | Critical moisture content. | | 8 | Unit of Mass Density of a particle, suspended in a vertical pipe is | kg/m³. | | 9 | For the drying of pastes, which type of dryer would you recommend? | Spray dryer. | | 10 | The shape of a food material cannot be expressed by | A single geometrical factor. | | 11 | The drying period not visible in a convection drying process is | Warming-up period. | | 12 | Thickness of grains spread over Flat bed dryers is | 10-20 cm. | | 13 | The thermal conductivity of bulk grain varies from | 0.1 to 0.5 W/m-K. | | 14 | Recommended rate of Air flow in Deep bed dryers is | 0.25-0.5 m³/s per tonne of grain. | | 15 | With the increase in sharpness of any particle, porosity | Increases. | | 16 | For hilly regions, which type of greenhouse is preferable? | Step or terraced greenhouse. | | 17 | In the case of "Ridge and furrow type greenhouse," two or more 'A'-frame greenhouses are connected to one another along the length of the eave | True. | | 18 | Truss framed structures can be used if the greenhouse span is | Greater than 12 m. | | 19 | Which of the following materials cannot be used for construction of truss? | Glass. | | 20 | The main disadvantage of Rigid panel greenhouses is that these panels | Are expensive and fragile. | | 21 | In cooler regions, greenhouses should be signed with the ridge running | East-West. | | 22 | Optimum CO2 intake for proper growth of the plant in greenhouses should be | 1000-1200 ppm. | | 23 | Commonly freestanding greenhouse size is | 9 m x 18 m or similar. | | 24 | The unit of thermal conductivity is | W/m-K. | | 25 | Which of the following is not a frictional property of food materials? | Thermal conductivity. | | 26 | Dividing the thermal conductivity with the product of specific heat and mass density gives us | Thermal diffusivity. | | 27 | Moisture migration between atmosphere and a hygroscopic product depends on the difference of | Water vapor pressure. | | 28 | In case of LSU dryer, the inlet and outlet ports are of | Adjustable size. | | 29 | In case of Deep bed dryer, "drying front" exists | Within the grain mass. | | 30 | Most efficient Model to determine EMC is | Chung-Pfost model. |