Screw threads are a helix or conical spiral form on the external surface of a shaft, or internal surface of a cylindrical hole.

Answer the following statement true (T) or false (F)


True

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Name three of the four characteristics used in rating DC motors.

What will be an ideal response?

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When used in control cable, which of the following must be grounded in order to be effective?

a. Drain wires b. Crimp connectors c. Conductors d. Screw terminals

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Temperature, quantity, and cleanliness are three important factors that should be addressed when referring to water quality.

Answer the following statement true (T) or false (F)

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Refer to Problem 9.38. Assume:


|io|avg = 600 mA |vo|avg = 50 V
Vr = 8% = 4V
vline = 170 cos(?t) V ? = 377 rad/s

Determine:

a. The turns ratio n.
b. The capacitor C.

Problem 9.38

In the full-wave power supply shown in Figure P9.38 the silicon diodes are 1N4001 with a rated peak reverse voltage of 25 V.

n = 0.05883
C = 80 ?F Ro = 1 k?
vline = 170 cos(377t) V

a. Determine the actual peak reverse voltage across each diode.
b. Explain why these diodes are or are not suitable for the specifications given.


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