SECTION B
5.
answer any four of the following , each not
exceeding 150 words:
(a)
Draw a block diagram of operations for a
rice-processing center from receiving up to final storage. Label the diagram
and the processes clearly.
(b)
List the
main components of a cream separator Explain the process of cream separation
with two most important precautions for good cream separation.
(c)
Write down the following:
(i)
Instrument used to measure acceleration
(ii)
Quantity measured with stroboscope
(iii)
Expression to define decibel (db)
(iv)
Henderson’s equation for grain isotherm
(v)
The maximum recommended angle of inclination for
bucket elevator.
(d)
Using a microprocessor and appropriate circuits,
it is of a grain combine. The control is to system for operation of a grain
combine. The control is to maintain a constant height of cutting at a fixed
moisture content of the grains. In case the grain moisture exceeds the limit, the
combine is to sound a warning and stop forward movement. Show the schematic
design including elements of the control system. To elaborate on the working of
the design a block diagram may be used to show the functioning of the system.
(e)
Define or briefly explain the following :
(i)
Equilibrium moisture content
(ii)
Pasteurization
6.
(a) Explain falling rate period of drying
process including rate of heat transfer of material and falling rate drying
mechanism.
(b) With a neat diagram, explain the deep-bed- drying arrange mends and
psychometric Chart used for drying.
(c) Explain program transfer and problem analysis in Agricultural
Engineering.
7.
(a) Explain properties of agricultural materials
used in solving different processing problems in grain.
(b) Describe indirect dryers with
separate collector and drying chamber. Give expression for the efficiency of
solar energy collector.
(c) Explain basic laws for operating solar dryers and solar energy
utilization in crop drying.
8.
(a) Explain solar grain drying system. Show the
working of a double air pas solar grain dryer. Give points of consideration n
the selection of solar energy dryers.
(b) Explain the characteristics of any three of the following:
(I)
Oscillators
(II)
Multi-vibrators
(III)
Amplifiers
(IV)
Rectifiers
(C) Explain methods of size reduction. Give different laws for energy
requirement in size reduction.
