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Test your basic knowledge |
Industrial Electrical Transformer Principles
Start Test
Study First
Subjects
:
engineering
,
ib
Instructions:
Answer 12 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The effects of inductance are mutual between the primary and secondary. The current in the primary induces a voltage in the secondary.
KVA Rating
Secondary Winding
Mutual Inductance
Efficiency
2. The connection of a transformer to form a 'A' configuration. Delta connections can be made by connecting odd to even terminals.
Efficiency
Primary Winding
Delta Connection
Secondary Winding
3. (+) = Positive and (-) = Negative. Also see Transformer Polarity.
Polarity Markings
Additive Polarity
Mutual Inductance
Wye Connection
4. The result of the energy wasted in reversing the magnetization of the core every time the current reverses and magnetizes the core in a different direction
Mutual Inductance
Wye Connection
Hysteresis Losses
Secondary Winding
5. Polarity where the HI marking is opposite the X2 marking and the H2 marking is opposite the X1 marking.
KVA Rating
Mutual Inductance
Additive Polarity
Secondary Winding
6. The winding that is connected to the load. It does not necessarily have to be the low voltage winding.
Wye Connection
Polarity Markings
Efficiency
Secondary Winding
7. Efficiency is always the ratio of output to input. It is the ratio of true (output power) to apparent (input power).
Efficiency
Mutual Inductance
Transformer Polarity
Delta Connection
8. The rating of a transformer in kilovolt- amps.
Mutual Inductance
Efficiency
Hysteresis Losses
KVA Rating
9. The primary winding is the winding that is connected to the source voltage. It does not necessarily have to be the high voltage winding.
Primary Winding
Transformer Polarity
Hysteresis Losses
Mutual Inductance
10. The connection of transformer to form a 'Y' configuration. 'Y' connections can be made by connecting either the even terminals or the odd terminals together.
Wye Connection
KVA Rating
Hysteresis Losses
Mutual Inductance
11. A system of (ANSI) markings of the transformer leads. The high voltage leads are 'H' leads and the low voltage leads are 'X' leads.
Secondary Winding
KVA Rating
Transformer Polarity
Primary Winding
12. The multiplier from line to neutral in a 3- phase transformer. Example: A 3- phase 'Y' to neutral--208 volts divided by 1.73 equals 120 volts.
Hysteresis Losses
Primary Winding
Significance of 1.73
Mutual Inductance