UPSC IFS 2018 Question Paper for Agriculture Engineering Paper - II

EXAM-(M) 2018 FS I -D-AGRE

AGRICULTURAL ENGINEERING
Paper - II

Time Allowed: Three Hours Maximum Marks : 200

Question Paper Specific Instructions

Please read each of the following instructions carefully before attempting
questions:

There are EIGHT questions in all, out of which FIVE are to be attempted.

Questions no. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are
to be attempted selecting at least ONE question from each of the two Sections A and B.

Attempts of questions shall be counted in sequential order. Unless struck off, attempt of a
question shall be counted even if attempted partly. Any page or portion of the page left
blank in the Question-cum-Answer Booklet must be clearly struck off.

All questions carry equal marks. The number of marks carried by a question/pan is
indicated against it.

Answers must be written in ENGLISH only.

Unless otherwise mentioned, symbols and notations have their usual standard meanings.
Assume suitable data, if necessary and indicate the same clearly.

Neat sketches may be drawn, wherever required.

FSI-D-AGRE

SECTION A

Ql. (a) Define tillage. What do you understand by primary tillage and
secondary tillage ? Classify implements on the basis of how they are
attached to the tractor. 8

Explain the working of 4-stroke cycle diesel engine with the help of
labelled sketch. 8

Define Ergonomics and Anthropometry. Describe in brief about the
human factors considered in design of modern tractors. 8

What is traction ? Explain with proper equations/expressions how the
traction can be improved under (i) sandy soil, and (ii) clayey soil
conditions. 8

Explain the working principle of a downdraft type gasifier with a
suitable diagram. 8

Q2. (a) What is the function of furrow opener in a seed drill ? Write down the
different types of furrow openers, their construction and the soil
conditions in which they are suitable. 10

What is the function of a mower ? Write down the different parts of a
conventional reciprocating mower. What do you understand by
Alignment and Registration of mower? 10

Define the following: 20
Volumetric efficiency
Octane number
IHP
Detonation
Ignition delay
Theoretical field capacity
Scouring
Centre of resistance of MB plough
Disc angle
Solar constant
FSI-D-AGRE 2

Q3. (a) What are the different phases of anaerobic digestion for bio-gas
production ? What are the advantages of anaerobic digestion? 10
How is power transmitted from the engine to the traction wheels and
PTO shaft of two-wheel drive tractor ? Explain with a suitable schematic
diagram 10
A tractor operated hydraulic sprayer has 13 nozzles at 40 cm spacing. The
application rate and speed of travel are 800 lit/ha and 5 kna/h,
respectively. Determine the nozzle flow rate in lit/min.
Also determine the working pressure and power requirement of the pump
if the nozzle diameter is 0.5 mm Consider the coefficient of discharge and
mechanical efficiency of the pump as 0.35 and 0.6, respectively. 20

Q4. (a) Explain the principle of operation of concentrating type solar collector
with a suitable diagram.
What are the advantages and disadvantages of such collectors over flat
plate solar collectors ? 15
Determine the cost of operation in /hour of a 45 hp tractor of
t 6.0 lakh purchase price following straight line method of depreciation.
Consider the operational life of the tractor is 10 years and its salvage
value as 10% of purchase price. Assume all other necessary parameters
as and when necessary. 15
The cut-in wind speed of a horizontal axis wind generator having 8 m
diameter blade span is 5-0 m/s. The wind turbine generates 4.0 kW
electrical power at 6.5 m/s wind speed. Determine the overall efficiency
of the wind turbine generator considering the density of air as
1-2 kg /m3. 10

FSI-D-AGRE 3

SECTION B

Q5. (a) What are the reasons for fouling of heat exchangers during milk
processing? 8

Explain with a neat diagram how a diaphragm can be used for
measuring pressure difference in a system. 8

What is meant by sphericity of a particle ? Write the expression for
determining sphericity of a body. How does a jaw crusher work? 8

What are the steps involved in producing alcohol from sugarcane
bagasse? 8

Name any two input devices and two output devices of a computer.
What are the primary and secondary storage of a computer system ?
What is the function of the central processing unit of a computer? 8

Q6. (a) With a neat diagram describe the operation of a belt conveyor indicating
the placement of valves and motors. 15

(b) The mass of a material on a belt conveyor of length 20 m is 200 kg and
the conveyor is moving with a speed of 2 m/min Calculate the capacity
i.e. the flow rate of material on the belt conveyor in kg/s. 10

What is Seebeck effect ? How is this principle applied in the operation of
a thermocouple used for measuring temperature? 15

Q7. (a) Write the basic mass and energy balance equations for a single effect
evaporator, clearly defining each term. 10

What is meant by dry and wet basis calculations for moisture content in
solids ? How much water must be removed from parboiled paddy with
45% moisture content (wet basis) to produce 500 kg of dry parboiled
paddy with 15% moisture content (wet basis) ? 15

What is a filter aid? Name any one material that is used as a filter aid.
Describe the operation of any one batch filter used in agricultural
processes. 15

FSI-D-AGRE 4

Q8. (a) Draw the flowchart of making butter from milk in a continuous
process. 15

What is the difference between sterilisation and pasteurisation ? What
are the steps involved in making cheddar cheese from milk? 15

Write the algorithm in any programming language for calculating the
Reynolds number when various sets of values of diameter of a pipe (D),
linear velocity of a fluid through the pipe (v), density of the fluid (p) and
viscosity of the fluid (µ) are given. 10

FS I -D-AGRE 5