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Agte 321:Farm Power And Machinery Question Paper
Agte 321:Farm Power And Machinery
Course:Agriculture
Institution: Kenya Methodist University question papers
Exam Year:2012
KENYA METHODIST UNIVERSITY
END OF 1''st ''TRIMESTER 2012 EXAMINATIONS
FACULTY : SCIENCE & TECHNOLOGY
DEPARTMENT : AGRICULTURE AND NATURAL RESOURCES
UNIT CODE : AGTE 321
UNIT TITLE : FARM POWER AND MACHINERY
TIME : 2 HOURS
INSTRUCTIONS
This paper has two sections: Section I and Section II.
Answer all the questions in Section I and only two Questions in Section II.
SECTION I (Answer all the questions in this section)
Question One
Discuss briefly four advantages of mechanization of farm activities. (8 Marks)
Question Two
List four advantages and four disadvantages of draught animals compared to tractors. (8 Marks)
Question Three
Four oxen of approximately 550kg live mass each are harnessed to a farm machine by use of an evener.
With the help of a diagram, show how the team of four (4) animals may be connected to the implement.
(4 Marks)
Calculate the expected power output if:
The pull/weight ratio for the oxen is about 0.12;
The multiplication factors for such animals working in a team are1.9, 2.5, 3.1, 3.5, and 3.8 for 2,3,4,5 and 6 animals respectively.
Working speed of 3 KM/Hour.
(4 Marks)
Question Four
Based on their relationship with the source of power, motorized implements can be grouped into many types. Describe four of those types and for each type, name one example of implement. (8 Marks)
Question Five
Mention four major objectives of tillage and explain briefly how tillage by a mould board plough can achieve each of those objectives. (8 Marks)
SECTION II (Answer all sub questions of any two questions in this section)
Question Six
Assume you work for a company dealing with farm machinery for hire. A farmer asks you to estimate for him the cost of tilling his 10 hectare field. Using the following information:
The implement to be used is a two-bottom mould board plough of rated width 75cm and mounted on a wheel-type tractor working at an average speed of 6km/h with an effective field efficiency of about 80%.
The new cost of the mould board was Ksh.20, 000 and it is expected to stay in use for 15 years. It is used for about 100 hours in a year. Its cost of repair and maintenance per hour is estimated at 0.08% of the new cost.
The new cost of the tractor was Ksh.1, 500,000 and it is expected to stay in use for 20 years. On average, it is used for about 500 hours in a year. Its cost of repair and maintenance per hour is estimated at 0.01% of the new cost. The tractor uses an average of 4 litres of diesel per hour costing Ksh.95 per litre and its driver is paid Ksh. 200 per hour.
The interest rate charged by local banks is 20% p.a.
The company has a policy of charging a 10% profit for each hire operation.
Estimate:
The time required for the tilling operation to nearest ½ hour.(5 Marks)
The cost of the operation.
(10 Marks)
Question Seven
With the help of diagrams where possible, describe five components of a disc plough and state the function of each component. (15 Marks)
Question Eight
State five activities required for maintenance and good care of farm implements and explain the importance of each activity. (15 Marks)
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