Answer the following statement(s) true (T) or false (F)
1. Motors that used a centrifugal switch to disconnect the start windings cannot be used with variable voltage control.
2. Double-face clutches have both the armature and field discs mounted on the same hub.
3. The accompanying diagram has a double-face magnetic clutch.
4. Clutches cannot provide a smooth start for loads that can be damaged by sudden starting, or for high inertia loads such as centrifuges or flywheels
5. The problem with eddy current clutch circuits is that they lack a speed sensing device that automatically increases or decreases the DC excitation current when load is added or removed
1. True
2. True
3. False
4. False
5. False
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Consider an iron?carbon alloy containing 1.0 percent carbon.
(a) If this composition is slowly cooled from the austenite region, what would be the respective percentages of the constituents and the phases in this microstructure? (b) Now assume that it has been cooled at a rate rapid enough to yield a proeutectoid constituent of only 1.2 percent. What would be the percentage of the constituents and the phases in this case?
The four types of soft foot that may exist are parallel soft foot, angular soft foot, ____ soft foot, and induced soft foot.
A. springing B. bent C. twisted D. vibrating
Internally, PLCs operate on voltages less than or equal to _____
A) 12 V B) 2.5 V C) 24 V D) 5 V
The proper selection of a respirator is based on the _____
a. user?s size and level of activity b. contaminant present and its concentration c. amount of time it will be worn d. wearer?s personal preference