Basic Electrical Circuits
- Circuit tester
A tool used to sense if AC electricity is present is called a __________. - Circuit tester - Cathode - Surge protector - Circuit breaker
amp
An ohm is a unit of resistance and the unit of measurement for current is the ______. - amp - watt - volt - ohm
operator
A pushbutton switch consists of a(n) ________ and one or more sets of contacts. - positioner - arm - selector - operator
- Momentary
A pushbutton switch with a return spring is called a(n) __________ switch. - Automatic - Self-opening - Momentary - Intermittent
momentary
A selector switch that returns to its original position when the knob is said to have ______ action. - momentary - constant - temporary - maintained
- Linear
A solenoid is an output device that moves in a(n) __________ motion when current is applied. - Rotary - Linear - Elliptical - Oscillatory
automatic
A switch activated by a machine or device is described as ________. - manual - programmed - automatic - double throw
- Energize and de-energize circuits
A switch is used to __________. - Control current - Increase voltage - Energize and de-energize circuits - Change from A/C to DC current
- Resistance
Ohms are a measurement of __________. - Voltage - Wattage - Resistance - Current
switch
A(n) _______ is a simple method for opening and closing an electrical circuit. - switch - battery - conductor - insulator
knife
A(n) _______ switch uses a lever operator that conducts current between one or more sets of contacts. - limit - parallel - knife - blade
schematic
A(n) ________ diagram uses symbols to represent the components in an electrical circuit. - schematic - pictorial - power flow - line
- Schematic
A(n) __________ diagram uses symbols to represent electrical devices and how they are connected. - Pictorial - Isometric - Scaled - Schematic
- Closed
A(n) __________ electrical circuit provides a path for current to flow between the positive and negative terminals of a power supply. - Open - Closed - Incomplete - Series
- None of the above
A(n) __________ switch is not a manually operated switch. - Pushbutton - Selector - Knife - None of the above
- Selector
A(n) __________ switch uses a rotary motion to open and close contacts. - Automatic - Pushbutton - Selector - Knife
cycles
Alternating current pushes electrons in one direction for a time and then pushes them in the opposite direction in ________. - waves - phases - cycles - pulses
- Every 6 months or so
Devices such as fire alarms should have the backup batteries replaced __________ to be safe. - Annually - Every 6 months or so - Bi-annually - Every decade
negative
Electrons are small particles that exist in all atoms and have a(n) _______ charge. - neutral - positive - proton - negative
series
In a(n) ________ circuit all inputs must be closed for electricity to flow. - parallel - integrated - series - compound
overloads
Power supplies frequently have fuses or circuit breakers to prevent ________. - power surges - power interruptions - voltage drop - overloads
conventional
The _______ theory of current flow states that current flows from the positive terminal of the power supply to the negative terminal. - traditional - transverse - electron flow - conventional
conductor
The four basic components of an electrical circuit are a power supply, an input device, output device, and a(n) _______. - insulator - battery - switch - conductor
- Amp
The unit of measurement for current is the __________. - Ohm - Amp - Watt - Volt
- All of the above
What is the function of a power supply? - Regulate voltage or current - Create smooth output voltage or current - Prevent an overload - All of the above
motor
Which output device produces rotary mechanical motion? - motor - lamp - resistor - solenoid
regulation
_____ is the function of a power supply that provides either a constant voltage or constant current. - regulation - compression - filtration - compensation
current
_______ is the rate of flow of electrons through a conductor. - current - resistance - capacity - voltage
alternating current
________ is more efficient to transport over long distances from the power plant to the point of use. - direct current - high frequency - alternating current - high current
- Direct
__________ current flows in only one direction. - Alternating - Absolute - Direct - Inverse
- Voltage
__________ is the amount of force exerted to move electrons. - Current - Voltage - Resistance - Power
- Manual
__________ switches are operated by humans to control power flow to outputs. - Manual - Automatic - Pneumatic - Limit
