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Abe2322:Introduction To Farm Power And Machinery Question Paper

Abe2322:Introduction To Farm Power And Machinery

Course:Bachelor Of Horticulture

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE 30 MARKS
(a) Briefly discuss the role of Agricultural Mechanization in the development of agriculture based economies of the third world countries. (8Marks) (b) Define the following engine terminologies: (i) Bore (ii) Stroke (iii) Piston displacement (iv) Clearance volume (v) Compression ratio (5Marks)
(c) With the aid of labeled diagrams show the schematic arrangement of the valve system in the process of operating the valves. (6Marks)
(d) Briefly explain three classifications of Agricultural field machines and give two examples in each case. (6Marks)
(e) Outline five methods of planting/seeding. (5marks)
2
QUESTION TWO 20 MARKS
(a) Explain the operation of a compression ignition type of four stroke cycle engine. (5Marks) (b) With the aid of a labeled diagram show the main components of a diesel engine fuel system. (6Marks) (c) With the aid of a labeled diagram show the features of a two stroke cycle engine. (3Marks) (d) The bore and stroke of a certain engine are given as 110mm and 135mm respectively. It is also given that the clearance volume is a seventh of the piston displacement. Calculate: (i) The piston displacement (ii) The total cylinder volume (iii) The compression ratio. (6Marks)
QUESTION THREE 20 MARKS
(a) Briefly discuss three types of engine lubrication systems. (9Marks) (b) The cross-sectional area of a furrow cut by a certain tillage implement is 60sq.cm. Given that the average soil resistance is 0.6kg/sq. cm, calculate the pull exerted by the power source if the implement pulls at an angle of 250 with the horizontal. (6Marks) (c) Outline two seeding/planting methods. (5Marks)
QUESTION FOUR 20MARKS
(a) Briefly explain two types of crop protection machines. (7Marks) (b) Calculate the time required to harvest 5.0 hectares of grass by means of a 2.0 meters wide mower operating at a speed of 4.5km/hr. Take the field efficiency of the mower to be 90%. (5Marks) (c) Briefly discuss the following aspects of horticultural machinery/structures: (i) Grading and grading machines (ii) Greenhouse classification. (8Marks)

Abe2322:Introduction To Farm Power And Machinery Question Paper

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