A current magnetic relay opens and closes its contacts based on the ____.
A. current in the start winding
B. voltage across the start winding
C. voltage across the run winding
D. current in the run winding
Answer: D
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When a flexible metal chimney liner is used, the _____.
a. liner must always be insulated with transite b. liner may need to be a larger diameter than the correct size of smooth, rigid pipe c. liner can be sized in the same way as solid metal vents d. furnace must always be common-vented with the water heater
Discuss the most important document when troubleshooting a circuit.
What will be an ideal response?
Which of the following logic families has the highest maximum clock frequency?
A) HCMOS B) S-TTL C) AS-TTL D) HS-TTL
Describe the two most popular ways to measure the air volume supplied by the system blower.
What will be an ideal response?