Clamping diodes ________
A) Can suppress transient voltages
B) Are connected into a circuit with the positive voltage source to the cathode and the negative voltage to the anode
C) Are called despiking diodes
D) Are all of the above
D
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Answer the following statement(s) true (T) or false (F)
1. Control magnetic relays are used to control small loads. 2. Most of the relays used in machine tool control have double-break contacts. 3. Relays are used more often to open and close control circuits than to operate power circuits. 4. The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration. 5. Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.
Figure 30-2
In the accompanying figure, the brake is applied automatically when the motor is not operating.
Answer the following statement true (T) or false (F)
Symbols used to show cable tray systems on working drawings are explained in the _____.
a. NEC® b. legend c. detail drawings d. isometric drawings
Bone fragility is a more serious problem in caged layers as compared with floor-reared
layers. A. True B. False