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