How does a diode operate?
What will be an ideal response?
The diode operates like an electric check valve in that it permits current to flow through it in only one direction. If the diode is to conduct current, it must be forward biased. The diode is forward biased only when a positive voltage is connected to the anode and a negative voltage is connected to the cathode. If the diode is reverse biased, the negative voltage connected to the anode and the positive voltage connected to the cathode, it will act like an open switch and no current will flow through the device.
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Technician A says installing straight seam cam bearings is best accomplished using an expanding mandrel. Technician B says lubricating the outside of the bearing with 90- or 140-weight oil makes installation much easier. Who is right?
A. Technician A B. Technician B C. Both technicians D. Neither technician
By raising the forearm in the air, index finger pointing upward and holding the hands straight, the operator will know to raise the cable on the crane.
Answer the following statement true (T) or false (F)
Domestic cats and dogs have excellent homing instincts. This ability to find their way back home is apparently accomplished by smell and observing landmarks
A. True B. False
What type of refrigerant oil is used in R-134a systems?
A) POE B) PAG C) Mineral D) Either A or B, depending on the vehicle