Power System - I (3140914) MCQs

MCQs of Introduction to Wind and Solar Power Generation

Showing 61 to 70 out of 137 Questions
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61.
Tip speed of a wind turbine rotor of radius 20 m and speed of 30 RPM is
(a) 30 m/s
(b) 60 m/s
(c) 120 m/s
(d) 200 m/s
Answer:

Option (b)

62.
Torque available at the rotor shaft for
Turbine rotor diameter = 80 m
Turbine speed = 15 RPM
Wind speed = 8 m/s
Air density = 1.225 kg/m3
Power coefficient = 0.4
(a) 1,25,440×103 Nm
(b) 1,25,440×10–3 Nm
(c) 1,25,440 Nm
(d) 1,25,440×109 Nm
Answer:

Option (c)

63.
Maximum wind energy available is proportional to
(a) Air density
(b) (Wind velocity)3
(c) (Rotor diameter)2
(d) All of above
Answer:

Option (d)

64.
Maximum possible efficiency of wind power plant is
(a) 30%
(b) 48%
(c) 59%
(d) 65%
Answer:

Option (c)

65.
Which type of wind power plants are termed as cross wind axis machine
(a) Horizontal axis wind machines
(b) Vertical axis wind machines
(c) Both (a) and (b)
(d) None of above
Answer:

Option (b)

66.
Which type of generator is used in wind power plant
(a) Synchronous generator
(b) Induction generator
(c) Both (a) and (b)
(d) None of above
Answer:

Option (b)

67.
Wind turbines are of
(a) Vertical axis type
(b) Horizontal axis type
(c) Both (a) and (b) type
(d) None of above
Answer:

Option (c)

68.
What kind of energy does a wind turbine use?
(a) Kinetic energy
(b) Potential energy
(c) Chemical energy
(d) Thermal energy
Answer:

Option (a)

69.
Which of the following countries ranks first in installation of wind power?
(a) Germany
(b) USA
(c) India
(d) Denmark
Answer:

Option (a)

70.
Which of the following states in India ranks first in the installation of wind power?
(a) Gujarat
(b) Andhra Pradesh
(c) Maharashtra
(d) Tamil Nadu
Answer:

Option (d)

Showing 61 to 70 out of 137 Questions
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