1. Maximum wind energy available is proportional to:
a) Air density
b) Cube of wind velocity
c) Square of the rotor diameter
d) All the above
2. Theoretical maximum efficiency of wind power is about
a) 30%
b) 48%
c) 59%
d) 65%
3. Which type of wind mills are termed as ''cross-wind axis'' machines:
a) Horizontal axis wind mills
b) Vertical axis wind mills
c) Both (a) and (b)
d) None of the above
4. The drawbacks of wind energy is:
a) Unreliability an non-steadiness
b) Output voltage and frequency fluctuations
c) Can affect the bird life
d) All the above
5. Which type of Generator is employed in wind power plant:
a) Synchronous generator
b) Induction generator
c) Permanent magnet motor
d) Brushless motor
6. The kinetic energy per unit volume is given by where ρ is the density of the air and v is the velocity of wind in m/sec
a) 0.5xρxV2
b) ρxV2
c) 2xρxV2
d) 4xρxV2
a) Air density
b) Cube of wind velocity
c) Square of the rotor diameter
d) All the above
2. Theoretical maximum efficiency of wind power is about
a) 30%
b) 48%
c) 59%
d) 65%
3. Which type of wind mills are termed as ''cross-wind axis'' machines:
a) Horizontal axis wind mills
b) Vertical axis wind mills
c) Both (a) and (b)
d) None of the above
4. The drawbacks of wind energy is:
a) Unreliability an non-steadiness
b) Output voltage and frequency fluctuations
c) Can affect the bird life
d) All the above
5. Which type of Generator is employed in wind power plant:
a) Synchronous generator
b) Induction generator
c) Permanent magnet motor
d) Brushless motor
6. The kinetic energy per unit volume is given by where ρ is the density of the air and v is the velocity of wind in m/sec
a) 0.5xρxV2
b) ρxV2
c) 2xρxV2
d) 4xρxV2
only 6 questions!
ReplyDelete