Time Allowed: Three Hours Maximum Marks: 200
Candidates should attempt Questions 1 and 5 which are
compulsory, and any THREE of the remaining questions, selecting at least ONE question
from each Section.
Assume suitable data if considered necessary, and indicate
the same clearly.
SECTION A
1.
Write short notes not exceeding 150 words each,
on any four the following:
(a)
Paddy transplanter
(b)
Solar phot-
voltaic Panel
(c)
Smokeless Chulah
(d)
Transformer and Voltage Stabilizer
(e)
Prony-brake dynamometer
2.
(a) With
the help of the sketch, describe the most commonly used fuel supply system of a
farm tractor. What improvements will you suggest to achieve a better performance
?
(b) Why power tillers coul nto be popularized In India farming conditions?
(c) A farmer has purchased a 35 hp tractor for Rs. 2,50.000/- He wishes
to use it for custom hiring with a 20% profit on its actual cost of operation
.Assuming all reasonable data, calculate
the hourly charges for the tractor.
(b) What are the precautions to be
following during installation, operating & repair of an electric motor on
the farm?
(c) During a motor performance
test, following measurements are recorded:
Voltage = 220 volt; Current= 12Amp.
Speed = 1440 rpm; Torque = 12 N-m
Input Power = 2.1 k W.
Calculate the following:-
(i)
Power factor
(ii)
Horse –power output
(iii)
Motor efficiency
4.
(a) Describe the safety arrangements for the
operator in the following farm- machines:
(i)
Power thresher
(ii)
Hand operated chaff cutter
(iii)
Sugarcane crusher
(b) Describe different types of threshing
mechanisms used in crop-threshers. Describe three most commonly used performance
parameters of a power thresher.
(c) A 2.4 m wide disc-harrow at
km/h speed is ploughing a field 10 cm deep. The measured draft is 450 kg.
Calculate the specific draft & draw ber horse power of the implement.
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