Transformer MCQs Part 35

Electrical Engineering MCQ on Transformer

Reduction in core losses and increase in permeability are obtained with transformer that have

Reduction in core losses and increase in permeability are obtained with transformer that have

1. Core built-up of laminations of cold rolled grain oriented steel
2. Core built-up of laminations of hot rolled sheet
3. Either of above
4. None of above

Correct answer: 1. Core built-up of laminations of cold rolled grain oriented steel

The leakage flux in a transformer depends on

The leakage flux in a transformer depends on

1. Load current
2. Load current and voltage
3. Load current, voltage and frequency
4. Load current, voltage, frequency and power factor

Correct answer: 1. Load current

In a transformer routine efficiency depends on

In a transformer routine efficiency depends on

1. Load current
2. Power factor of load
3. Both of above
4. None of above

Correct answer: 4. None of above

The permissible flux density in case of cold rolled grain oriented steel is about

The permissible flux density in case of cold rolled grain oriented steel is about

1. 1.7 wb/m²
2. 2.7 wb/m²
3. 3.7 wb/m²
4. 4.7 wb/m²

Correct answer: 1. 1.7 wb/m²

The protection that is normally not provided on small distribution transformers

The protection that is normally not provided on small distribution transformers

1. Buchholz relay
2. Over fluxing protection
3. Overcurrent protection
4. All of above

Correct answer: 1. Buchholz relay