The hole drilled in sheet metal for a tapping screw should be the approximate size of ____.
A. the thread diameter
B. the thread root diameter
C. the shank diameter
D. none of the above
Answer: B
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The shoe support pads ________
A) Prevent the brake shoes from rotating with the drum B) Are lightly coated with silicone brake grease to minimize wear C) Hold the shoes against the drum when the parking brake is applied D) Prevent the wheel cylinder pistons from coming out of their bores
What type of communication is generally of a point-to-point nature?
A. Terrestrial B. Microwave C. Satellite D. Voice-grade
In the operation of electrical circuits, which, in most cases, is an unwanted by-product?
A) mechanical motion B) light C) heat D) both B and C
For the circuit shown in Figure P18.10:
a. Determine the reluctance values and show the magnetic circuit, assuming that ? = 3,000?0.
b. Determine the inductance of the device.
c. The inductance of the device can be modified by cutting an air gap in the magnetic structure. If a gap of 0.1 mm is cut in the arm of length l3, what is the new value of inductance?
d. As the gap is increased in size (length), what is the limiting value of inductance? Neglect leakage flux and fringing effects.
