What problems may result if the taps are not connected properly on a three-phase transformer or bank of transformers?
What will be an ideal response?
The following problems may result if the taps are not connected properly:
• The output voltage on each of the three secondary voltages is not the same. This produces high unbalanced currents that causes overheating of induction motors.
• An undesirable circulating current creates a “false load ” condition if the transformer is connected delta-delta.
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What will be an ideal response?
For steels containing more than ____ % carbon, preheating and subsequent heat treatment generally are required.
A. 0.30 B. 0.40 C. 30 D. 40
In a slowly cooled hypereutectoid iron?carbon steel, the pearlite colonies are normally separated from each other by a more or less continuous boundary layer of cementite. Explain how it is that this microstructure develops. Use simple sketches to illustrate your answer.
What will be an ideal response?
The show ring routine consists of walking, _____, and teaching how to move around the ring.
Fill in the blank(s) with the appropriate word(s).