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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 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
Significance of 1.73
Transformer Polarity
Hysteresis Losses
Wye Connection
2. (+) = Positive and (-) = Negative. Also see Transformer Polarity.
Additive Polarity
Polarity Markings
Efficiency
Transformer Polarity
3. 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.
Polarity Markings
Primary Winding
Mutual Inductance
Significance of 1.73
4. Efficiency is always the ratio of output to input. It is the ratio of true (output power) to apparent (input power).
Polarity Markings
Additive Polarity
Efficiency
Mutual Inductance
5. 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
Transformer Polarity
Polarity Markings
Additive Polarity
6. The winding that is connected to the load. It does not necessarily have to be the low voltage winding.
Secondary Winding
Wye Connection
Significance of 1.73
Primary Winding
7. Polarity where the HI marking is opposite the X2 marking and the H2 marking is opposite the X1 marking.
Efficiency
Hysteresis Losses
Additive Polarity
Wye Connection
8. 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
Polarity Markings
Primary Winding
KVA Rating
9. The effects of inductance are mutual between the primary and secondary. The current in the primary induces a voltage in the secondary.
Secondary Winding
Mutual Inductance
Efficiency
KVA Rating
10. The primary winding is the winding that is connected to the source voltage. It does not necessarily have to be the high voltage winding.
Mutual Inductance
Significance of 1.73
Primary Winding
Polarity Markings
11. The rating of a transformer in kilovolt- amps.
Primary Winding
KVA Rating
Efficiency
Delta Connection
12. The connection of a transformer to form a 'A' configuration. Delta connections can be made by connecting odd to even terminals.
Transformer Polarity
Wye Connection
Significance of 1.73
Delta Connection