Magnetic field strength is measured in ________
A) Density B) Coil strength C) Ampere-turns D) Flux
C
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Answer the following statement(s) true (T) or false (F)
1. A compound motor can be obtained by placing both a series field winding and a shunt field winding on the field poles of the motor. 2. Not all electric motors are suited to have their speed controlled with smooth acceleration or deceleration, but DC motors do have this ability. 3. The cadmium-controlled rectifier (CCR) is the most popular device among the thyristors, or electronic switches. 4. The direction of rotation of a DC motor can be reversed by changing the connections of either the armature or the field leads. 5. In the brush-type PM motor, the armature winding is no longer rotating, but is mounted within the outer frame structure, and is now called the stator.
The depth of penetration of flare-formed groove welds is assumed to extend to ____.
A. the ends of the members B. the tangent points of the members C. the distance equal to the width of the members D. the closest flush surface of the members E. none of the above
The process of depositing connective weld beads parallel to one another is known as _____
a. padding b. stringing c. pooling d. weaving