Section A
Q1.
(a) Write about the scope of agricultural mechanization for marginal and small land-holding fields in India.
(b)
Differentiate between the following in brief :
(i) 2-Stroke and 4-Stroke engine
(ii) Draft control and Position control hydraulic system
(iii) Spraying and Dusting
(iv) Seed drill and Transplanter
(c)
Justify the following in brief :
(i) Why is the size of rear wheels of tractor larger than the front wheels?
(ii) Why is producer gas not used directly for domestic purpose?
(iii) Why is the compression ratio of CI engines higher than SI engines?
(iv) Why is thermostat valve used in cooling system?
(d) What is gasification? Explain the working of up-draft type gasifier with a neat diagram.
(e) What factors are required to be considered for selection of electric motor used in agricultural operations? Write about the regular maintenance needed by an electric motor.