Name: ABE 192-Agricultural Processing Questions Section: Instruction: Answer the following questions. Cite your sources (preferably books/published e-books/published efiles). For questions involving problems, attach your complete solutions. Note: For your sources, follow this format: Title of book, Author/s, page number. 1. Any rice and corn variety which meet the second highest grade requirements for rice and corn as set forth in the herein prescribed national standards. a. Grade No. 1 b. Grade No. 2 c. Grade No. 3 d. Premium SOURCE: 2. Pieces of grains smaller than 8/10th of the average length of the unbroken grain. a. brewers rice b. broken rice c. brown rice d. head rice SOURCE: 3. A rice thresher that is fed at one end and discharges threshed product at the other end is a. radial-type thresher b. hold-on type thresher c. axial-flow type thresher d. none of the above SOURCE: 4. Part of rice thresher that causes the movement of panicles from one end to the other end of the threshing cylinder. a. louvers b. concave c. peg-tooth d. wire loop SOURCE: 5. It measures the ability of the machine to remove hulls with minimum breakage. a. coefficient of hulling b. coefficient of breakage c. coefficient of wholeness d. coefficient of husking SOURCE: 6. It is the extent by which the bran layer of brown rice is removed as a result of whitening. a. milling degree b. degree of whitening c. milling recovery d. all of the above SOURCE: 7. Minimum hulling efficiency requirement for rice mill based on the standard performance criterion. a. 90% b. 80% c. 70% d. 60% SOURCE: 8. Size of wire mesh used in storage to protect stored product from insects and rodents. a. 1/8 wire mesh b. 1/4 " wire mesh c. 1/2 wire mesh d. 3/4 " wire mesh SOURCE: 9. It is the fibrous layer of paddy when hull is removed and is frequently known as the silver skin of brown rice. a. lemma and palea b. pericarp c. bran layer d. embryo SOURCE: 10. It is recommended that paddy should be harvested when 80% of the panicle are fully ripe for the reason that a. Harvesting paddy below 80% will produce more broken grains b. Harvesting paddy above 80% will produce more empty grains c. Harvesting paddy above 80% will produce more shattered and broken grains d. All of the above 11. In grain drying theory, drying will occur if a. The vapor pressure of grains is higher than the vapor pressure of the air b. The vapor pressure of grains is lower than the vapor pressure of the air c. The vapor pressure of grains is equal with the vapor pressure of air d. None of the above SOURCE: 12. If the end point in milling is brown rice, the grain has just passed through a a. paddy cleaner b. rubber roll huller c. whitener d. sifter SOURCE: 13. Adjustment clearance for rubber brakes in vertical abrasive whitening cone. a. 1 to 2mm from cone coating b. 2 to 3mm from cone coating c. 3 to 4mm from cone coating d. 4 to 5mm from cone coating SOURCE: 14. Maximum speed requirement of vertical abrasive whitening cone machine. a. 13m/s b. 14m/s c. 15m/s d. 16m/s SOURCE: 15. Recommended clearance setting between stones of a disk huller. a. 1/8 of the length of paddy b. 1/4 of the length of paddy c. 1/2 of the length of paddy d. 3/4 of the length of paddy SOURCE: 16. What is the maximum allowable increased in crack grains for batch-type mechanical rice dryers? a. 2% b. 3% C. 5% d. 7% SOURCE: 17. Shelled corm initially at 24% is to be dried to 14%. If the initial weight of com is 1,000kg., what is its final weight? a. 782kg b.827kgc.884kg d. 1,132kg 18. A bin of grain is to be dried with air at a dry bulb temperature of 110F and an air flow rate of 1000cfm. The ambient air conditions are 85F (dry bulb) and 70F (wet bulb), and the average relative humidity of the outlet air after it passed through the grain is 85%. If the specific volume of the inlet air is 14.0ft/lb., what is the mass flow rate of the air in pound dry air per hour? a. 4,285.7lb dy airhr b. 4,560.5lbdyaid/hr c. 4,658.3lb dy arr /hr d. 4,186.4lb dy oir /hr 19. If the enthalpy of the air (ambient) and the air entering the grain are respectively, 34.1 and 40.6 Btulb dry air, what is the total amount of heat (Btu/hr) required for problem \#17? a. 27,857BTU/hr. b. 29,600BTU/hr. c. 30,277BTU/hr. d. 27,170BTU/hr. 20. If the humidity reactions of ambient air entering exciting the grain are 0.0124 and 0.0192 Ib moistrellbady ar, what is the amount of moisture (lb/hr) removed in problem \#17? a. 28.42lbw/hr b. 29.14lbw/hr c. 31.20lbw/hr d. 31.70lbw/hr 21. How many kilograms of rice hulls are needed to dry 1 ton of palay from 24% to 14% w.b.? Assume latent heat of vaporization is 2,500kJ/kg, heating value of rice hull is 14 MJ/kg and efficiency is 100%. a. 116.3kg b. 20.8kg c. 29.1kg d. 157.8kg 22. An open-sundrying floor is used to reduce the moisture content of five tons of paddy from 23% to 13% wet basis. The amount of moisture removed is about a. 471kg b. 575kg c. 451kg d. 571kg 23. Calculate the moisture ratio given the following: initial moisture content =22%; equilibrium moisture content =14% and actual moisture content =18%. a. 0.375 b.0.5c.0.67 d. 0.75 24. Ten tons of shelled corn will be stored in a cylindrical silo. Loading will be done only from the bottom to the top of the cylindrical container without considering the additional volume of the cone due to the effect of the angle of repose of the sample. If the silo requires a ratio of 1.5D=H, what would be the dimension of the silo? Assume a bulk density for shelled corn of 45lb/ft3. a. D=2.07m;H=4.14m. b. D=2.70m;;=4.41m. c. D=2.82m.;H=3.24m. d. D=2.28m;;=3.42m. 25. Out of the 200kg of paddy rice that goes through the rubber role of a rice mill, 44kg of unhulled paddy is collected. What is the hulling coefficient? a. 44% b. 60% c. 78% d. 85% 26. Sixty thousand cubic meters of air is needed to be removed from grains to attain a moisture content of 14% dry basis which safe for long term storage. What fan capacity is needed to accomplish drying in 8 hours? a. 125 cubic meters per minute b. 140 cubic meters per minute c. 150 cubic meters per minute d. 180 cubic meters per minute 27. A blower elevates forage into a 12.2m high silo at the rate of 455kg/ minute. Determine the input power of the blower if its efficiency is 40%. a. 0.91kW b. 2.3kW c. 5.55kW d. 1.5kW 28. Three cavans of rough rice ( 50kg per cavan) was milled by a mobile 'baby cono'. The output consists of 95kg of whole rice and 7kg of brokens. What is the milling recovery? a. 63% b. 65% c. 68% d. 70% 29. One ton of rough rice at 24% moisture content wet basis is to be dried to 14% moisture content dry basis. What is the weight of dry matter? a. 700kg b. 760kg c. 240kg d. 140kg 30. What is the final weight of paddy rice in item \# 29 ? a. 714.4kg b. 866.4kg C. 883.7kg d. 920.2kg