List of top Agricultural Process Engineering Questions asked in GATE AG

Pitting is a process of
Molecular masses of water and air are 18.02 kg/(mol·mol) and 28.97 kg/(mol·mol), respectively. The room temperature is 40°C under total pressure 101.3 kPa. The relative humidity at 40°C is 73.7 kPa. Find the relative humidity in percent.
A cylindrical storage bin with an internal diameter of 4 m and a height of 16 m is completely filled with paddy having bulk density of 640 kg·m\(^3\). The angle of internal friction between grain and bin wall is \(30^\circ\) and the ratio of horizontal to vertical pressures is 0.4. When the grain filling rises from 4 m to 16 m in height, the lateral pressure increases by a multiple of \(\underline{\hspace{1cm}}\).
An air screen grain cleaner unit of capacity one ton·h\(^{-1}\) with two screens was evaluated with a feed containing 8.5% impurities. During the operation, the clean grain at blower outlet, overflow of first screen, and underflow of second screen were found to be 0.3%, 1.2% and 0.8%, respectively. If the clean grain contains 0.6% impurities, the cleaning efficiency of the cleaner unit in percent would be \(\underline{\hspace{1cm}}\) (round off to one decimal place).
In a size reduction operation, the power required to crush 2 ton of feed material per hour is 7.2 kW. Eighty per cent of the feed and product material pass through 4.75 mm and 0.5 mm sieve openings, respectively. The work index of the material is:
Ball mill diameter = 200 cm. Ball sizes: 10 cm (dry), 20 cm (wet). Find change in operating speed (rpm) (round to 2 decimals). (Take π = 3.14, g = 9.81)
Fresh potatoes = 1000 kg, initial solids = 14%, final solids = 93%. Loss in peeling = 7%. Find product yield percent (integer).