1011901
| Questão | Responda |
| A(n) ___ device is an electronic component that switches or controls the flow of current in a circuit with no moving parts. | Solid state |
| A(n) ___ board is a thin plate of insulating material, such as fiberglass or phenolic, with conducting paths laminated to one or both sides. | Printed Circuit |
| ___ voltage is temporary, undesirable voltage spike, ranging from a few volts to several thousands volts and lasting a few microseconds up to several milliseconds. | Transient |
| A voltage sag is a ___ decreased below the normal rated line voltage. | 10% |
| T or F A PC board must be handled under static-free conditions only. | True |
| T or F The fundamental line frequency it the U.S is 60 Hz | True |
| T or F Diodes are marked or shaped to indicate their anode and cathode. | True |
| A(n)___ is an electrical component that converts AC to DC by allowing voltage and current to move in only one direction. | Rectifier |
| A(n) ___ is a three-terminal semiconductor device that controls current flow depending on the amount of voltage applied to the base. | Transistor |
| A(n) ___ is an electrical switch that is actuated by a separate circuit. | Relay |
| ___ current is the small amount of current flowing through a solid-state device when it is not conducting. | Linkage |
| A(n) ___ is a control device that uses a preset time period as a control function. | Timer |
| A(n) ___ is a device that changes DC voltage into AC voltage of any frequency. | Convertor |
| A(n) ___ is a solid-state control device that is programmed and reprogrammed to automatically control an industrial process or machine. | PLC |
| A voltage swell is a ___ increase above the normal rated line voltage. | 10%+ |
| A ___ is a material that has little resistance and permits electrons to move through it easily. | Conductor |
| ___ -type material is semiconductor material with empty spaces (holes) in its crystalline structure. | P |
| ___ -type material is semiconductor material with free electrons in its crystalline structure. | N |
| A(n) ___ is an electronic component that allows current to pass in only one direction. | Diode |
| A(n) ___ rectifier containing four diodes. | Bridge |
| A ___ sensor is a device that reacts to the proximity of a target with out physical contact | Proximity |
| A(n) ___ fault is the malfunction of only a section or several sections of a machine | Partial |
| T or F Computer operations cannot be adversely affected by momentary power interruptions. | False |
| T or F Heat sinks are devices that conduct and dissipate heat away from a component. | True |
| T or F A large percentage of electronic device failures are caused by static electricity discharge. | True |
| T or F A half-wave rectifier is a circuit containing a diode that permits both the positive and negative halves of the AC sine wave to pass | Flase |
| ___ current is the minimum current required to keep an SCR conducting | Holding |
| A(n) ___ is a device that combines the effect of a photo-diode and the switching capability of a transistor. | Photo-transistor |
| A ___ is a device that produces electricity when two different metals that are joined together are heated. | Thermocouple |
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