Question { 8826 }

why the exhaust temp of gas turbine is more than steam
turbine

Answer

Of course we can expand the combustion products of gas
turbine to the extent as in steam turbine. But that would be
economical to let the exhaust gases at higher temperatures
to have Optimum out put from the cycle ( i.e, GT & HRSG).
That means the Output from the cycle by expanding the gases
to the extent as in steam turbines would be relatively lower
that that of the Output of cycle (GT & STG) by recovering
the heat from high temperature exhaust gases from GT.

Question { 3106 }

question related 2 soal car:
Working under a bright light bulb or in direct sunlight,
experiment with the angle of light hitting the solar
panels. What angle gives you the fastest rotation of the
wheels?
How would you modify this car to make the wheels turn
faster?
How would you modify this design to make a car that could
carry or pull a heavier load?
How could you modify this design so that your car could run
for short periods in complete darkness or low light
situations?

Answer

The amount of solar energy absorbed from the source will not
depends upon how much brighter the source but depends on the
intensity of radiation of generation and angle of projection
on to the surface of solar panels.
Capability of absorption of radiation depends upon the
length of radius from source to solar surface and would be
maximum at 90 deg angle as reflection from the surface will
be minimum.
I would be know that in a solar car the torque for the
wheel is supplied from an electric motor. The source for the
electric motor is from the batteries which can be charged by
solar energy. wheels can run faster as u give higher voltage
to the motor. So the speed of car depends on your motor
capacity and the distance you could travel depends on your
battery bank charging capacity.
If you increase the capacity of motor you will have
higher speed as well as you can modify the design to make
your car that could carry heavy loads.
By increasing the size of the battery bank (in sens
capacity to store energy will be increased) you can run the
car for short periods in complete darkness or low light
situations.

Question { NTPC, 15689 }

how do you come to know air is fully saturated

Answer

We will confirm that the air is fully saturated if dry bulb
temperature and wet bulb temperature are same.