NOCTI ENGINEERING PT4
Terms in this set (32)
Main function of DC power supply?
convert alternating current into direct current
Function of an ammeter
measures electrical current in a circuit
transfers heat through direct contact
Heat transfer in a gas or liquid by the circulation of currents from one region to another.
changes direct current (DC) to alternating current (AC)
In a simple DC circuit with a constant voltage, as resistance increases, current will
The ____ is an electrical component that can hold a charge for a period of time
The junction of two dissimilar metals that produces a voltage proportional to the amount of heat applied is a
Increasing a flowing liquids viscosity or friction, or changing flow direction will result
an increase in heat production
A system is considered to have_________ elements if any single element can fail while still maintaining a completed circuit
Unit of capacitance is:
Diode is a device that will
Permit current to flow through it in only one direction
The primary function of DC power supplies
Convert for AC to DC
The AC voltage waveform is called a ___ wave
Install purge protection on electrical equipment to
Shield equipment from sudden power increases
The resistance of a wire is a function of it length, diameter and
The __ is used to measure electrical current
The equation for the basic unit of electrical power (the watt) is
When measuring DC voltage, the meter should be connected in?
An electrical component referred to as a rheostat is a type of?
Because switches can fail after opening a disconnect, the safest practice is to
Lock and tag the disconnect
An electronic inverter
Changes DC to AC
Engineer connected to an oscilloscope to measure the output of a standard wall electrical outlet. The oscilloscope shows a 60 hertz sine wave measuring 120 volts. The signal is
When measuring current, the meter should be connected in
Which switch opens automatically when the current exceeds a predetermined safety level
The primary function of the fuse in a circuit should be to
Protect from open circuits
When replacing a motor, special attention to information on the nameplate is important because the nameplate specifies the ___ at which the motor may be operated
Ohm's Law states
R = E/I
Circuit breakers are wired in _____ with the load.
Cell surrounding iron core, voltage applied, is an
Oscilloscope connected to measure output of a standard wall electrical outlet. The signal is
If the meter function is set for AC voltage a " no voltage" reading taken across a fuse in a powered circuit indicates that the
Fuse is blown
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