Explain why the NEC® and local utility companies require the service entrance disconnecting means, if located inside a house, to be installed as close as possible to where the service conductors enter the house.
What will be an ideal response?
Electrical utility companies provide limited overcurrent protection to service conductors and in the event of a fault, the service conductors could ignite nearby combustible materials.
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If the input impedance is defined as Zin = Vs/Is, find the input impedance of the op amp circuit in Fig. 10.116 when R? = 10 k?, R? = 20 k?, C? = 10 nF, C? = 20 nF, and ? = 5000 rad/s.
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Technician A says that many bearings also have a thin overlay of babbitt. Technician B says that bearings should have spread and crush to keep them from spinning when the crankshaft rotates. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
What is flow separation? What causes it? What is the effect of flow separation on the drag coefficient?
What will be an ideal response?
When laying out a wall, why should the sole plate and the top plate be different lengths?
a. To prevent butt joints from falling directly above each other b. To use up shorter lengths of lumber c. To eliminate the need for splicing d. To provide a nailing surface for ceiling joists