Power System - I (3140914) MCQs

MCQs of Introduction to Wind and Solar Power Generation

Showing 21 to 30 out of 137 Questions
1 2 3 4 5 6
21.
Wind energy is converted into electrical energy with the use of
(a) Turbine
(b) Generators
(c) Motors
(d) Blades
Answer:

Option (a)

22.
Usual blade diameter of wind turbine is
(a) 25 m
(b) 70 m
(c) 100 m
(d) 150 m
Answer:

Option (a)

23.
A rotor installed in a fixed orientation with the swept area perpendicular to the predominate wind direction is called
(a) Nacelle
(b) Yaw fixed machines
(c) Blades
(d) Turbine
Answer:

Option (b)

24.
Which part of the wind turbines senses wind speed, wind direction, shaft speed and torque?
(a) Blade
(b) Shaft
(c) Rotor
(d) Controller
Answer:

Option (d)

25.
Total power Pt for wind power plant is
(a) ρπd2v3/8
(b) ρπd2v3/4
(c) ρπd2v3/2
(d) ρπd2v3
Answer:

Option (a)

26.
Usual efficiency of wind power plant ranges between
(a) 10 – 12%
(b) 18 – 20%
(c) 50 – 70%
(d) 80 – 90%
Answer:

Option (c)

27.
What is air density for 10 m/s wind at 1std atmospheric pressure and 15°C?
(a) 0.1 kg/m3
(b) 1 kg/m3
(c) 1.2 kg/m3
(d) 2 kg/m3
Answer:

Option (c)

28.
Severe fluctuations in power is undesirable in wind power plant because
(a) It creates power oscillations
(b) It damages the parts
(c) It reduces the efficiency
(d) All of above
Answer:

Option (a)

29.
The amount of energy available in the wind at any instant is proportional to
(a) (Wind speed)1/2
(b) Wind speed
(c) (Wind speed)2
(d) (Wind speed)3
Answer:

Option (d)

30.
Wind speed suitable to operate wind turbines is
(a) 5 – 25 m/s
(b) 10 – 35 m/s
(c) 20 – 45 m/s
(d) 30 – 55 m/s
Answer:

Option (a)

Showing 21 to 30 out of 137 Questions
1 2 3 4 5 6