MAASAI MARA UNIVERSITY
REGULAR UNIVERSITY EXAMINATIONS 2013/2014 ACADEMIC YEAR
SECOND YEAR SECOND SEMESTER
SCHOOL OF BUSINESS AND ECONOMICS
BACHELOR OF AGRICULTURAL ECONOMICS
COURSE CODE: AGR 281
COURSE TITLE: AGRICULTURAL POWER AND MACHINES
DATE:17TH APRIL 2014 TIME: 2.00PM – 5.00PM
INSTRUCTIONS TO CANDIDATES
Question ONE is compulsory
Answer any THREE questions
This paper consists of 2 printed pages. Please turn over.
1. a) Explain the disadvantages of mechanical farm power. (3 Marks)
b) Explain the desirable qualities of a sprayer. (3 Marks)
c) Compare and contrast two stroke and four stroke engines. (4 Marks)
d) Explain the undesirable effects of high temperature in engines.
(5 Marks)
e) Briefly explain the care and maintenance practices of disc ploughs . (5 Marks)
f) Discuss the purpose of lubrication of moving parts in internal combustion engines. (5 Marks)
2. Write concise notes on components of a mechanical seed metering drill. (15 Marks)
3. Discuss the factors to consider when selecting a tractor for farm operations. (15 Marks)
4. a) Explain the operation of the Knapsack sprayer. (6 marks)
b) Explain the factors to consider during care and maintenance of farm sprayers.
(9 Marks)
5. a) Describe the cooling, sealing and cleaning effects of lubricants.
(6 Marks)
b) Explain the adjustments done to control depth and width of ploughing to increase pulverization in disc ploughs. (9 Marks)
