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Heat Engine, Refrigeration and Air Conditioning, Mechanical Engineering,
Text Transcript from Video
jhulka Marcin and in this video daughter
you are going to learn about a new
question which has been asked in gate
previous here in numerical data type all
right so what they have asking this
question that is important I mean this
is also important to know what topic is
this I mean in this question what is
they are talking about as you have read
the title that it is said that it's a
they said it's a question of heat engine
right that's why I came to know it's the
question of heat engine but if you will
land directly on the question without
knowing any title then probably you will
be in confusion that what's what I
thought what topic is this what the
question is asking so let me share with
you how you can find how you can able to
find out about it that is useful work
maximum useful work can be of temp of
the heat source from the last statement
we can come to know that this is a topic
this is a question of heat engine so
once we come to know this is a question
of heat engine without thinking anything
else first draw a diagram of heat engine
right and find out I mean just start
like this and now find out what they
have given they said source that means
this is a source so source temperature
is 500 Kelvin and provides thousand kilo
Joule
okay now the temperature the other
source is 27 degrees centigrade that
means 27 plus 273 so it's 300 Kelvin
okay now what they have asked maximum
useful work we have to find out W is
equal to what we have given three values
only so we have to look at the
relationship what relationship we are
having we know the efficiency is equal
to what output by input so output is
what W input is what thousand kilos or
now anyhow we have to find out also in
kilojoules so doesn't matter we don't
need to take kilo the algae is 10 to the
power 3 because we as it is it is as
that that
have to find out the answer in kilojoule
so we know that W is equal to thousand
multiple efficiency work done right now
if any how we can find out efficiency
then we can find out what is the work
done what is the useful work now again
we know that what is the formula for
efficiency in terms of temperature that
is t1 minus t2 by t1 so what is t1 minus
t2 that is t1 is 500 minus t2 is 300
divided by 500 so it's 200 by 500 this
cancels so it's today what is the value
of we are getting that is 2 by 5 that
means 0.4 now put the value of this
efficiency what we got point 4 here so
what we got thousand point 4 is equal to
400 kilo joules right now as it is a
numerical type question here fourth
answer is 400 kilo Joule yeah 400 kilo
Joule so the input is 1000 kilo Joule
and work done we are getting is 4,400
kilo Joule and the reject is 600 kilo
Joule
okay because incoming is equal to our
outgoing we know that so this is all
about the question of heat engine and
the same portion as in a previous year I
hope you will have understand the
quotient and if you'll get caution
related to a it in in upcoming zamnesia
and I hope you can solve it right so
thanks for watching thank you very much
and if you are getting help for my tour
tools don't forget to share with your
friends that's why they will also get
help from the Turtles all right so
thanks for watching thank you very much
bye bye hope to see you again in my next
video tutorial bye
you are going to learn about a new
question which has been asked in gate
previous here in numerical data type all
right so what they have asking this
question that is important I mean this
is also important to know what topic is
this I mean in this question what is
they are talking about as you have read
the title that it is said that it's a
they said it's a question of heat engine
right that's why I came to know it's the
question of heat engine but if you will
land directly on the question without
knowing any title then probably you will
be in confusion that what's what I
thought what topic is this what the
question is asking so let me share with
you how you can find how you can able to
find out about it that is useful work
maximum useful work can be of temp of
the heat source from the last statement
we can come to know that this is a topic
this is a question of heat engine so
once we come to know this is a question
of heat engine without thinking anything
else first draw a diagram of heat engine
right and find out I mean just start
like this and now find out what they
have given they said source that means
this is a source so source temperature
is 500 Kelvin and provides thousand kilo
Joule
okay now the temperature the other
source is 27 degrees centigrade that
means 27 plus 273 so it's 300 Kelvin
okay now what they have asked maximum
useful work we have to find out W is
equal to what we have given three values
only so we have to look at the
relationship what relationship we are
having we know the efficiency is equal
to what output by input so output is
what W input is what thousand kilos or
now anyhow we have to find out also in
kilojoules so doesn't matter we don't
need to take kilo the algae is 10 to the
power 3 because we as it is it is as
that that
have to find out the answer in kilojoule
so we know that W is equal to thousand
multiple efficiency work done right now
if any how we can find out efficiency
then we can find out what is the work
done what is the useful work now again
we know that what is the formula for
efficiency in terms of temperature that
is t1 minus t2 by t1 so what is t1 minus
t2 that is t1 is 500 minus t2 is 300
divided by 500 so it's 200 by 500 this
cancels so it's today what is the value
of we are getting that is 2 by 5 that
means 0.4 now put the value of this
efficiency what we got point 4 here so
what we got thousand point 4 is equal to
400 kilo joules right now as it is a
numerical type question here fourth
answer is 400 kilo Joule yeah 400 kilo
Joule so the input is 1000 kilo Joule
and work done we are getting is 4,400
kilo Joule and the reject is 600 kilo
Joule
okay because incoming is equal to our
outgoing we know that so this is all
about the question of heat engine and
the same portion as in a previous year I
hope you will have understand the
quotient and if you'll get caution
related to a it in in upcoming zamnesia
and I hope you can solve it right so
thanks for watching thank you very much
and if you are getting help for my tour
tools don't forget to share with your
friends that's why they will also get
help from the Turtles all right so
thanks for watching thank you very much
bye bye hope to see you again in my next
video tutorial bye
About this Video
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Apr 26, 2026 Last updated
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