Field windings of DC motors are normally made of copper wire and are insulated from but wrapped around metal plates, called _____________________.
Fill in the blank(s) with the appropriate word(s).
pole shoes
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Answer the following statement(s) true (T) or false (F)
1. A 1:1 relation exists between the primary and the secondary coils of the isolation transformer. 2. The secondary of an isolation transformer is usually grounded. 3. The “hot” power line is staked at a permanent ground reference by the power company. 4. A primary protector is used to protect the main system from higher voltage lightning strikes or switching transients on the input side of the power line. 5. Motor-driven generators are able to provide DC-to-AC conversion.
What is a suitable width for a secondary walk?
a. 1½ feet c. 2½ feet b. 2 feet d. 3 feet
_____ have traditionally served as the seedstockof the commercial swine industry.
Fill in the blank(s) with the appropriate word(s).
The adjustment of mechanical lifters is being discussed. Technician A says that lifters adjusted with too much clearance could result in burned valves. Technician B says that lifters adjusted with too much clearance will result in decreased valve lift and duration. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B