RE Flip CLass

Which of the following is a correct statement about Renewable Energy?

• It is formed from fossil fuels over millions of years

• It causes high levels of pollution like coal and oil.

•  It comes from natural sources that are constantly replenished.

• It is non-sustainable and increases carbon emissions.

What is the main importance of Wind Power?

• It is a non-renewable energy source

• It increases environmental pollution

• It is a sustainable and clean alternative to fossil fuels

• It is expensive and limited to specific regions

What is the basic principle of Wind Energy Conversion?

• Converting heat energy into mechanical energy

• Converting kinetic energy of wind into mechanical energy

• Converting chemical energy into electrical energy

• Converting solar energy into wind energy

Which component of a wind turbine is responsible for converting mechanical energy into electrical energy?

• Gearbox

• Rotor

• Generator

• Controller

Which of the following sequences correctly represents the energy conversion process in a horizontal axis wind turbine?

• Kinetic Energy → Electrical Energy → Mechanical Energy → Heat Loss

• Kinetic Energy → Mechanical Energy → Electrical Energy → High Voltage Transmission

• Potential Energy → Kinetic Energy → Electrical Energy → Mechanical Energy

•  Mechanical Energy → Kinetic Energy → Electrical Energy → Low Voltage Transmission

Which of the following statements is incorrect regarding the features and working mechanism of wind turbines?

• Small wind turbines use wind vanes for direction control, while large turbines rely on wind sensors coupled with servo motors for yaw control.

• The rotor in wind turbines is preferably placed downwind of the tower to minimize turbulence and maximize power output.

• The gearbox in the nacelle increases the rotor's low-speed rotation to a higher speed suitable for electricity generation.

•  Blades in some downwind turbines are designed to bend in high winds to minimize resistance and avoid structural damage.

Which of the following statements regarding Horizontal Axis Wind Turbines (HAWT) is incorrect?

• HAWTs experience much lower cyclic stress than VAWTs due to their lift-based energy extraction mechanism.

• Tall towers in HAWTs provide access to lower wind shear regions, thereby increasing power output exponentially.

• HAWTs require a Yaw Mechanism to orient the rotor perpendicular to the wind direction for maximum efficiency.

• One of the major disadvantages of HAWTs is the need for a braking system to prevent structural damage under high wind conditions.

Which of the following is a disadvantage of Vertical Axis Wind Turbines (VAWT) when compared to Horizontal Axis Wind Turbines (HAWT)?

• VAWTs require a yaw mechanism to face the wind direction for maximum efficiency.

• VAWTs experience greater turbulence effects near the ground, leading to increased vibration and wear.

• VAWTs cannot be installed on rooftops due to their large size and complexity.

• VAWTs have complex maintenance processes since their components are located at high altitudes.

Which of the following is an advantage of Vertical Axis Wind Turbines (VAWT)?

• Requires yaw mechanism for wind direction

• Difficult to maintain due to height

• Suitable for rooftops and areas with space restrictions

• High power generation due to tall towers

Correct Spelling of my SURNAME ?

• Chhetri

• Chettri

• Chetri

• Chhettri