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