If a bank has two single-phase transformers, one rated at 20 kVA and the other at 15 kVA, what would be their total capacity in kVA?

If a bank has two single-phase transformers, one rated at 20 kVA and the other at 15 kVA, what would be their total capacity in kVA?

• A. 30 kVA
• B. 25 kVA
• C. 35 kVA
• D. 40 kVA

Answer: (C)

To determine the total capacity of the two single-phase transformers, you simply add their individual capacities together. A single-phase transformer is rated in kVA (kilovolt-amperes), which represents its ability to handle electrical load.

In this case, you have one transformer rated at 20 kVA and another rated at 15 kVA. When you add these two ratings together:

20 kVA + 15 kVA = 35 kVA.

This total, 35 kVA, represents the combined capacity of both transformers working together. Thus, the total capacity in kVA of the two transformers is correctly noted as 35 kVA. This understanding of combining capacities is essential in electrical contracting when determining the load handling capabilities of transformers in various configurations.