The accompanying figure shows the steps involved in dividing a line segment into three equal parts. Explain these steps.
What will be an ideal response?
From point A, draw line AC forming any convenient angle with AB as in (a).On AC, with a compass, lay off any three equal segments, AD, DE, and EF ((a)).Connect point F with point B as in (b). With centers at points F, E, and D, draw arcs of equal radii. The arc with a center at point F intersects AC at point G and BF at point H. Set distance GH on the compass and mark off this distance on the other two arcs. The points of intersection are K and M.Connect points E and K, and D and M, extending the lines past AB. Line AB in (c) is divided into three equal segments; AP PS SB.
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Figure 3-10A shows a three position selector switch. When the operator is in the center position, ____.
a. Contact 1 is open
b. Contact 2 is open
c. Contact 3 is closed
d. Contact 4 is open
Why are single-element fuses particularly suited for the protection of circuit breakers with low interrupting ratings?
a. They have a high speed of response to overcurrents. b. They have a low speed of response to short circuit currents. c. They can be applied in circuits subject to temporary motor overload. d. They can be used in circuits other than motor branch circuits and feeders, such as lighting circuits.
If the idler arm and pitman arm are not level to each other, the car will experience ____________________.
Fill in the blank(s) with the appropriate word(s).
A tight nut can be removed using an impact wrench, squeezing the trigger rapidly to produce short bursts of power, or by spinning the shaft.
Answer the following statement true (T) or false (F)