## 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

A.Darrieus type
B.Sail type
C.Propeller type

A.300 to 400 rpm
B.60 to 80 rpm
C.200 220 rpm
D.180 to 190 rpm

A.temperature
B.pressure
C.volume
D.entropy

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

A.74
B.25
C.99
D.52

## The solar constant which is defined as the rate of which energy is received from the sun on a unit area perpendicular to the rays of the sun at the mean distance of the earth from the sun outside of the atmosphere has a standard value of

A.5669 W/m2
B.1353 W/m2
C.1.353 W/m2
D.none of the above

## For a steady state system

A.the rate of input is zero
B.the rate of the generation is zero
C.the rate of consumption is zero
D.the rate of accumulation is zero