In USA the mixture of 26.5% diphenyl and 73.5% diphenyl oxide is known as
A.Dowtherm G
B.Dowtherm J
C.Dowtherm A
D.Dowtherm HT
Category: Renewable Sources of Energy Mcqs
In an ideal Stirling cycle heat is added at constant
A.temperature
B.pressure
C.entropy
D.volume
The perihelion occurs on about
A.21-Jun
B.3-Jul
C.2-Jan
D.21-Mar
An advantage of using copper for the absorber plate is that
A.it has a higher thermal conductivity than other metals
B.it weights less than steel or aluminium
C.it is cheaper than steel or aluminium
D.it will not corrode easily so that water can be used as heat-exchange fluid.
One eV is defined as the energy gained by an electron when it is accelerated by a voltage difference of
A.1 V
B.1 kV
C.1 MV
D.1 mV
Which of the following is not combustible?
A.H2
B.CO
C.CCI4
D.CH4
In solar ponds there is a diffusive transport of heat and salt in the
A.UCL
B.NCL
C.LCL
D.all of the above
The radiation coming from the sun appears to be essentially equivalent to that of coming from a blackbody at a temperature of
A.10000 K
B.5762 K
C.600 K
D.1800 K
