SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Efficiency is always the ratio of output to input. It is the ratio of true (output power) to apparent (input power).
Secondary Winding
KVA Rating
Efficiency
Significance of 1.73
2. A system of (ANSI) markings of the transformer leads. The high voltage leads are 'H' leads and the low voltage leads are 'X' leads.
Additive Polarity
Hysteresis Losses
Efficiency
Transformer Polarity
3. The primary winding is the winding that is connected to the source voltage. It does not necessarily have to be the high voltage winding.
Hysteresis Losses
Secondary Winding
Additive Polarity
Primary Winding
4. (+) = Positive and (-) = Negative. Also see Transformer Polarity.
Polarity Markings
KVA Rating
Additive Polarity
Transformer Polarity
5. The connection of a transformer to form a 'A' configuration. Delta connections can be made by connecting odd to even terminals.
Hysteresis Losses
Wye Connection
Delta Connection
Transformer Polarity
6. 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.
Transformer Polarity
Efficiency
Significance of 1.73
Hysteresis Losses
7. The rating of a transformer in kilovolt- amps.
Primary Winding
Hysteresis Losses
KVA Rating
Transformer Polarity
8. Polarity where the HI marking is opposite the X2 marking and the H2 marking is opposite the X1 marking.
Efficiency
Additive Polarity
KVA Rating
Wye Connection
9. The winding that is connected to the load. It does not necessarily have to be the low voltage winding.
KVA Rating
Secondary Winding
Primary Winding
Wye Connection
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.
Primary Winding
Hysteresis Losses
Wye Connection
Mutual Inductance
11. 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
Transformer Polarity
Polarity Markings
Hysteresis Losses
Primary Winding
12. The effects of inductance are mutual between the primary and secondary. The current in the primary induces a voltage in the secondary.
Secondary Winding
KVA Rating
Additive Polarity
Mutual Inductance