The wavelength of which of the following is the largest?
A.Radio waves
B.Light waves
C.X-ray waves
D.Gamma ray waves
Category: Renewable Sources of Energy Mcqs
As the temperature of a hot glowing object increases the wavelength at the maximum of the blackbody radiation curve
A.increases
B.decreases
C.remains the same
D.increases linearly
In a shell and tube heat exchanger the baffles are used
A.to provide mixing of the fluid
B.to deflect the flow in a particular direction
C.to reduce the fouling of the tube surface
D.to reduce the pressure drop
The summer solstice occurs on about
A.21-Jun
B.22-Apr
C.22-May
D.21-Jul
The performance of a windmill rotor is indicated by plotting the variation of
A.coefficient of performance against tip speed ratio
B.maximum power available in the wind against wind speed
C.power delivered by the rotor against wind speed
D.maximum power available in the wind against speed at the tip of the rotor
An expression for the hour angle ? is where ts is the solar time in hours
A.? = 15(ts-6)
B.? = 15(ts+6)
C.? = 15(ts-12)
D.? = 15(ts-12)
