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M.R.W – 004
Energy
Management IGNOU MRW 004 Solved
Assignment 2022-23
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NOTE: All questions are
compulsory.
Q.1 Distinguish between the
following:
(a) Economy Technology and
Provident Technology
(b) Preliminary Energy Audit
and detailed Energy Audit
(c) Motors and Generators
(d) Constant volume process and
adiabatic process.
Q.2 Explain the Significance of
Energy resources in economic development of a country.
Q.3 (a) What is the need of
energy conservation?
(b) Explain the principles of
Energy conservation.
Q.4 (a) Enlist mechanical and
electrical Parameters (Five each) important for the energy audit and the
instruments used for it.
(b) Explain the working
principle of Thermocouple.
Q.5 (a) Explain any five Energy
Efficient devices and their significance in energy conservation.
(b) Explain any five important
energy conservation measures required in any of the industry you have visited
recently.
Q.6 (a) Explain both the
statements of second law of thermodynamics.
(b) A milk chilling unit can
remove heat from the milk at the rate of 41.87MJ/h. Heat leaks into the milk
from the surroundings at an average rate of 4.187 MJ/h. Find the time required
for cooling a batch of 500 kg of milk from 45°C to 5°C. Take the cpof milk to
be 4.187 kJ/kg K.
Q.7 (a) What is cogeneration?
How is it important for energy conservation?
(b) Air flows through an
adiabatic compressor at 2 kg/s. The inlet conditions are 1 bar and 310 K and
the exit conditions are 7 bar and 560 K. Compute the net rate of availability
transfer and the irreversibility. Take T0= 298K.
Q.8 (a) Illustrate with
examples, Kirchhoff’s laws as applied to an electric circuit.
(b) A circuit consisting of
12Ω, 18 Ω and 36 Ω respectively, joined in parallel, is connected in series
with a fourth resistance. The whole is supplied at 60V and it is found that the
power dissipated in 12 Ω resistance is 36 W. Determine the value of fourth
resistance and the total power dissipated in the group.
Q.9 (a) Explain the principle
of operation and construction of a dc generator.
(b) What is electric power
supply system? Draw a single line diagram of a typical a.c. power supply
scheme.
Q.10 (a) What is earthing? Why
earthing is required?
(b) Explain the working
principle of fuse and MCB.
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MRW 004 Solved Assignment English Medium 2022-23 The Indira Gandhi National
Open University has updated the IGNOU Assignment Status
2022-23 December Session so that students can know if their submission is
completed or not. Now if you have also submitted your
Assignment/Practical/Project till 15 December 2022 then you must be worried
about the Assignment Status and Grade Card. So we decided to come up with https://ignouadmission.samarth.edu.in/
Assignment
2022-23.