Electrical Level 3 Module 7 Questions n n n n n
with Correct Answers | Rated A+ n n n n n n
Which force allows the transfer of power from one circuit to another or creates a new service -
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CORRECT ANSWER -Mutal induction
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What are the three parts of a basic transformer - CORRECT ANSWER -Two coils and a single magnetic
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core
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Why aretransformers grounded - CORRECT ANSWER -To stabilize voltage, remove static electricity,
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ground case in case of contact
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Transformers are rated in - CORRECT ANSWER -Kilovaltampres (KVA) n n n n n n n n
Name the advantages and disadvantages of auto transformers - CORRECT ANSWER -Lower purchase
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price, better voltage regulation, lower sound levels and smaller size
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To ensure maximum safety in a control transformer the secondary control circuit is - CORRECT
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ANSWER -Isolated from the primary line circuit
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In a step down transformer with a turn ratio of 8:1 what will be the voltage on the secondary if the
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primary voltage is 4160 - CORRECT ANSWER -520v
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Which type of transformers can be ventilated , air cooled, or sealed - CORRECT ANSWER -Dry- type
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When a field from one coil cuts through the turns or a second coil, what actions occur -
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CORRECT ANSWER -Induction
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with Correct Answers | Rated A+ n n n n n n
Which force allows the transfer of power from one circuit to another or creates a new service -
n n n n n n n n n n n n n n n n n
CORRECT ANSWER -Mutal induction
n n n n
What are the three parts of a basic transformer - CORRECT ANSWER -Two coils and a single magnetic
n n n n n n n n n n n n n n n n n
core
n
Why aretransformers grounded - CORRECT ANSWER -To stabilize voltage, remove static electricity,
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ground case in case of contact
n n n n n n
Transformers are rated in - CORRECT ANSWER -Kilovaltampres (KVA) n n n n n n n n
Name the advantages and disadvantages of auto transformers - CORRECT ANSWER -Lower purchase
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price, better voltage regulation, lower sound levels and smaller size
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To ensure maximum safety in a control transformer the secondary control circuit is - CORRECT
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ANSWER -Isolated from the primary line circuit
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In a step down transformer with a turn ratio of 8:1 what will be the voltage on the secondary if the
n n n n n n n n n n n n n n n n n n n n
primary voltage is 4160 - CORRECT ANSWER -520v
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Which type of transformers can be ventilated , air cooled, or sealed - CORRECT ANSWER -Dry- type
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When a field from one coil cuts through the turns or a second coil, what actions occur -
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CORRECT ANSWER -Induction
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