Transformer

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Q1:-Shell type transformer is commonly used because

1. it has more magnitude flux leakage 
2. it has less magnetic flux leakage
3. it has two magnetic paths
4. both 2 and 3 

ANSWER:-4

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Q2:-The steel for construction of transformer core is made to have 

1. high permeability and low hysteresis loss
2. low permeability and high hysteresis loss
3. low permeability and high hysteresis loss
4. high permeability and high hysteresis loss

ANSWER:-1

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Q3:-The transformer oil used in transformers provides 

1. insulation and cooling
2. cooling and lubrication 
3. insulation and lubrication 
4. insulation cooling and lubrication

ANSWER:-4

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Q4:-The use of higher flux density in transformer design

1. increases the weight per KVA
2. decreases the weight per KVA
3. increases the weight per KVA
4. decreases the weight per Kw

ANSWER:-2

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Q5:-What type of core is used for a high frequency transformer ?

1. open iron core 
2. air core
3. closed iron core
4. none of these

ANSWER:-2

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