The temperature difference between water at the surface and the lower levels of the ocean (over a few handred metres) is about
A.40?C
B.60?C
C.20?C
D.50?C
Category: Renewable Sources of Energy Mcqs
The adiabatic throttling process of a perfect gas is one of constant
A.kinetic energy
B.enthalpy
C.potential energy
D.pressure
When visible light is scattered by air molecules which wavelengths are scattered the leave?
A.Violet
B.Yellow
C.Blue
D.Red
Darrieus type windmill______________?
A.requires less surface area as compared to Savonius type windmill
B.has two or three blades shaped like aerofoils
C.runs independently of the direction of the wind
D.all of the above
The coefficient of performance of the Carnot cycle_____________?
A. Is a function of the temperature limits
B. Can vary from zero to infinite
C. Both Aand B
D. Neither a nor b
Which of the following windmills runs independently of the direction of the wind ?
A.Darrieus type
B.Sail type
C.Propeller type
D.Multiblade type
Sail type windmill runs at speeds of_____________?
A.300 to 400 rpm
B.60 to 80 rpm
C.200 220 rpm
D.180 to 190 rpm
In the ideal Rankine cycle heat is added at constant
A.temperature
B.pressure
C.volume
D.entropy
For zenith angle of 60? at sea level air mass is
A.0
B.1
C.2
D.3
Which of the following angles is aero at solar sunset?
A.Latitude angle
B.Hour angle
C.Solar zenith angle
D.Solar altitude angle
