Question

Can the plain walled tanks accommodate the transformer for both large and small outputs?

(a) the plain walled tanks can accommodate for large outputs but cannot accommodate for small outputs

(b) the plain walled tanks can accommodate for large outputs and small outputs

(c) the plain walled tanks cannot accommodate for large outputs and small outputs

(d) the plain walled tanks can accommodate for small outputs but cannot accommodate for large outputs

The question was asked during an interview.

This key question is from Temperature Rise in Transformers in chapter Design of Transformers of Design of Electrical Machines

Answer 1

Correct option is (d) the plain walled tanks can accommodate for small outputs but cannot accommodate for large outputs

To explain: The plain walled tanks are large enough to accommodate the transformer and oil has sufficient surface to keep the temperature rise within limits for small outputs. But the plain walled tanks cannot accommodate the transformers for large outputs.