DEA Design of tank and cooling tubes of transformers

What is the function of the cooling tubes in a transformer tank?

• A. To reduce the noise level of the transformer

• B. To increase the magnetic flux density in the core

• C. To dissipate the heat generated by the windings

• D. To provide additional insulation to the windings

Which of the following is not a common method of cooling the windings in a transformer?

• A. Air cooling

• B. Water cooling

• C. Oil cooling

• D. Gas cooling

Which of the following is not a common type of transformer cooling system?

• A. Direct cooling

• B. Indirect cooling

• C. Forced air cooling

• D. Natural air cooling

What is the formula used to calculate the volume of oil required for a transformer tank?

• A. V = πr^2h

• B. V = πr^2h/2

• C. V = πr^2h/4

• D. V = πr^2h/8

What is the purpose of the tank in a transformer?

• A. To protect the transformer from physical damage

• B. To provide insulation between the transformer and the environment

• C. To contain the transformer's oil and prevent it from leaking

• D. To cool the transformer's oil

What is the function of cooling tubes in a transformer tank?

• A. To increase the surface area of the oil

• B. To decrease the surface area of the oil

• C. To provide insulation between the oil and the tank

• D. To prevent oil leaks

Which type of cooling tube is commonly used in transformer tanks?

• A. Smooth tubes

• B. Finned tubes

• C. Perforated tubes

• D. Welded tubes

What is the advantage of using finned tubes in transformer tanks?

• A. They increase the surface area of the oil

• B. They decrease the surface area of the oil

• C. They provide better insulation between the oil and the tank

• D. They prevent oil leaks

What is the purpose of cooling fans in transformer tanks?

• A. To circulate the oil inside the tank

• B. To regulate the temperature of the oil

• C. To increase the cooling efficiency of the transformer

• D. To prevent oil leaks

Which of the following is a disadvantage of using water-cooled transformer tanks?

• A. They are more expensive to install

• B. They require more maintenance

• C. They are less efficient than air-cooled tanks

• D. They are more prone to leaks