Energy Engineering Questions and Answers – Generation of Wind Energy
This set of Energy Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Generation of Wind Energy”.
1. “During the day, the air above the land heats up more quickly than the air over water”.
Explanation: The air above land heats up faster than the air above sea during the day. Warm air expands and rises over the ground, and heavier, cooler air rushes in to take its place, causing winds.
2. What happens when the land near the earth’s equator is heated?
a) All the oceans gets heated up
b) Small wind currents are formed
c) Rise in tides
d) Large atmospheric winds are created
Explanation: Because the area near the equator is heated more by the sun than the area near the north and south poles, the huge air winds that circle the world are formed. The primary application of wind energy is to create electricity.
3. What type of energy is wind energy?
a) Renewable energy
b) Non-renewable energy
c) Conventional energy
d) Commercial energy
Explanation: Because the wind will blow as long as the sun shines, it is said to as a renewable energy source. Wind power, as an alternative to burning fossil fuels, is abundant, renewable, widely spread, and clean, emitting no greenhouse gases during operation, consuming no water, and taking up minimal land.
4. What are used to turn wind energy into electrical energy?
c) Yaw motor
Explanation:Wind turbine blades catch mechanical energy from the wind and use it to move a driving shaft, gearbox, and generator to generate electrical energy. Wind turbine efficiency is influenced by a variety of factors, including turbine blade aerodynamics.
5. What is the diameter of wind turbine blades?
a) 320 feet
b) 220 feet
c) 80 feet
d) 500 feet
Explanation: Large utility-scale wind turbines can now generate more than a MW of electricity and transport it directly to the electric grid. These turbines are 200 feet tall at the rotor hub and feature blades that are 220 feet in diameter or more.
6. At what range of speed is the electricity from the wind turbine is generated?
a) 100 – 125 mph
b) 450 – 650 mph
c) 250 – 450 mph
d) 30-35 mph
Explanation: To avoid drive train damage, wind turbines are designed with cut-in and cut-out wind speeds, i.e. the wind speeds when the turbines start turning and shut off. Maximum power generation usually occurs at speeds of 30 to 35 mph.
7. When did the development of wind power in India began?
Explanation: Wind power development in India began in the 1990s. India is currently the world’s fourth largest wind power producer. The Indian energy sector has 32.72 GW of installed capacity. In today’s worldwide wind energy sector, India is a prominent player.
8. What does Heating and cooling of the atmosphere generates?
a) Thermo line circulation
b) Radiation currents
c) Convection currents
d) Conduction currents
Explanation: Wind energy can be used to generate electricity at a reasonable cost. Convection currents are created by the heating and cooling of the atmosphere. The absorption of solar radiation on the earth’s surface causes heating.
9. How much is the energy available in the winds over the earth surface is estimated to be?
a) 2.9 X 120 MW
b) 1.6 X 107 MW
c) 1 MW
Explanation: Wind energy available over the earth’s surface is projected to be 1.6 X 107 MW, which is nearly equal to current energy use. Wind energy can be used to power wind turbines, which in turn power generators.
10. How much wind power does India hold?
a) 20,000 MW
b) 12,000 MW
c) 140,000 MW
d) 5000 MW
Explanation: Wind power in India has a potential of 20,000 MW. Wind power provides for roughly 9.87 percent of India’s total installed capacity. Wind power generation in India is primarily concentrated in the southern states.
11. What is the main source for the formation of wind?
a) Uneven land
Explanation: Wind is a free and renewable source of energy that has been utilised to grind grain, power ships, and pump water throughout history. When the sun heats the ground unevenly, wind is formed.
12. Which country created wind mills?
Explanation: Persia was home to the world’s first windmills (Iran). Early wind turbines resembled enormous paddle wheels. The basic design of the wind mill was developed by the people of Holland centuries later. Windmills are well-known in Holland.
Wind power generating entails converting wind energy into rotational energy of the blades and then transferring that rotating energy into electrical energy by a generator. Because wind energy grows as the cube of wind speed, WTGs should be put in areas with higher wind speeds. Persia was home to the world’s first windmills (Iran). Early windmills looked large paddle wheels. The basic design of the wind mill was developed by the people of Holland centuries later. Windmills are well-known in Holland.