Electrical Mechanic Technician Practice Test

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• What term describes the total opposition a circuit offers to current flow?
• Resistance to the flow of electrons is measured in what unit?
• What is the function of an inverter?
• What does an ammeter measure?
• What effect does adding branches to a parallel circuit have?
• What is the unit of measurement for capacitive reactance?
• What type of switch is often used in electrical circuits?
• Which component would you use to change current flow in a circuit without switching it completely off?
• What happens in a series circuit if there is a break in the circuit?
• Which factor does NOT affect the strength of a magnetic field?
• What is the primary function of a two-way switch?
• Hertz (Hz) is the unit of measurement for what?
• Which of the following is not a measure of electrical parameters?
• Which device is used to measure electrical current?
• In a three-phase Y connected AC power system, what is the voltage between each pair of hot legs if the voltage from leg to ground is 120 volts?
• What safety risk do improperly rated fuses introduce in an electrical circuit?
• How does a conductor behave at the atomic level?
• At what angle should a wrench be held for optimal performance?
• To measure the electrical power in a balanced three-phase circuit, which instrument should be used?
• What is a short circuit?
• What is the principle of electromagnetic induction?
• Which type of motor is described as an AC motor that may trip when over?
• What is a common example of a device that converts energy to kinetic energy?
• Which instrument should be used to measure the state of charge of a lead-acid storage battery?
• What is meant by continuity in an electrical circuit?
• What is the primary use of hertz, kilohertz, and megahertz in electronics?
• What must exist for electricity to flow?
• In which type of battery would you typically find liquid electrolytes?
• What does an oscilloscope display?
• Which type of coil is better for magnetic lines of force?
• What does the term electromotive force (emf) refer to?
• When cutting .045 inch thickness sheet metal, what is the recommended teeth per inch for a hacksaw blade?
• What separates a fuse from other safety devices?
• What does impedance refer to in an AC circuit?
• What defines the main characteristic of a dual on/off switch?
• What might occur if a 40 ampere fuse is used in place of a 20 ampere fuse in a circuit?
• At what level do electronic devices typically operate?
• What happens when a push switch is not pressed?
• What does magnetic flux measure?
• What type of battery uses dry chemicals to produce an electric current?
• What is indicated by the color code on a resistor?
• If a 40-watt bulb operates for 5 hours, how many kilowatt-hours does it consume?
• Which of the following measures insulation resistance in millions of ohms?
• What is the voltage throughout a parallel circuit?
• Which type of variable resistor has only two contacts?
• Which characteristic does an electrical insulator have?
• What does inductance measure in a circuit?
• What identifies a capacitor's ability to store electrical energy?
• What is a common function of a motor controller?
• What is the formula described by the Pythagorean Theorem?
• What type of variable resistor is designed to control voltage?
• What does the 'micro' prefix signify?
• What is a relay switch capable of doing?
• What type of current is primarily used in transformers?
• What is the primary function of a distribution transformer?
• What is the effect of increasing current in a circuit?
• What is the main purpose of a diode in an electronic circuit?
• Which material has the least amount of resistance?
• In electrical circuits, what does the term "voltage" refer to?
• What are the three basic components of an atom?
• What is a push switch primarily used for?
• What is the main characteristic of a series circuit?
• Which device is used to measure electrical potential or voltage?
• Which instrument would you use to measure the thickness of a wire?
• What characterizes an insulator?
• In which unit are inductors rated?
• What is the effect of the current in a circuit with a fuse when too much current passes through?
• What is the definition of resistance in a DC circuit?
• What characterizes a wet cell battery?
• How does a dry cell battery generate electricity?
• How is energy typically measured?
• What defines a conductor?
• What feature makes squirrel cage induction motors economically favorable?
• Of the following materials, which one is NOT suitable as an electrical insulator?
• If 1 ampere is equal to how many coulombs per second?
• Which type of switch is known for isolating both live and neutral connections?
• Which terminal of a transistor serves as the voltage input?
• What does a voltage drop represent in an electrical circuit?
• What happens to current flow if a break occurs in a parallel circuit?
• What does a transducer do?
• Which instrument is specifically used for checking insulation resistance in electrical systems?
• What does amperage measure in an electrical system?
• Which phenomenon occurs if you add more branches to a parallel circuit?
• What does the prefix 'milli' represent?
• What is a key characteristic of a rubber-covered electrical cable?
• What type of device is an ohmeter?
• What is the unit of conductance?
• What characteristic do diodes possess regarding current flow?
• What does the power factor in an AC circuit refer to?
• What does CT stand for in electrical terminology?
• What is the correct relationship of coulombs to amperes?
• In an electrical context, what does the term "ground" mainly refer to?
• What type of current flows in only one direction?
• Which unit represents inductance?
• What is a transformer primarily used for?
• Which of the following correctly defines electrical conductivity?
• In the context of electrical circuits, what does the term "series" indicate?
• What does a multimeter NOT measure?
• Which of the following best describes how alternating current behaves?
• What do resistors do in a circuit?
• What is the main function of a filter in a power supply?
• What is the function of a circuit breaker?
• What is the primary use of Nichrome in electric heaters?
• How is power computed in electrical systems?
• What is the definition of voltage?
• Which two forces are responsible for keeping electrons in place?
• What is the term for the work required to be done in an electric circuit?
• In the context of electrical circuits, what does the term 'current' refer to?
• What is an ampere a measure of?
• What describes the operation of a push-to-break switch?
• Which measuring instrument can be used to measure current, voltage, and resistance?
• What is the principle behind a rectifier?
• What typically happens when a circuit breaker is activated?
• Which components make up a transistor?
• What is the purpose of a fuse in an electrical circuit?
• What is the purpose of a rheostat?
• Which circuit arrangement allows multiple paths for current to flow?
• What type of current do batteries typically produce?
• Which of the following is NOT a function of a variable resistor?
• What does the symbol 'E' in Ohm's law represent?
• What effect does adding a load in parallel have on the total resistance of a current?
• When tightening a bolt to a specified foot-pound measurement, which tool is most effective?
• What should you aim to achieve when operating a synchronous motor?
• Which of the following is a property of inductance?
• What wire size is most commonly used for branch lighting circuits in homes?
• What happens in a Zener diode when a threshold is met?
• What is the equation for Ohm's law?
• Which electrical measurement describes the flow rate of electric charge?
• What term describes a device that protects a motor from short circuiting?
• Which instrument should be used to measure the insulation of a rubber-covered electrical cable?
• What does a bolt specified as 1/4-28 indicate about its size?
• Which of the following properly describes capacitive reactance?
• Resistance is inversely proportional to what electrical property?
• What is the primary function of a rectifier?
• Which formula represents power (in watts)?
• What characteristic distinguishes a hydraulic bender from other types of benders?
• What are the primary components of a Wheatstone Bridge circuit?
• What is defined as the potential difference expressed in volts?
• What unit is used to measure electric charge?
• The difference in voltage between two points is referred to as what type of potential?
• Which electrical device is not typically used in direct current circuits?
• What is the value represented by the prefix 'Giga'?
• Which motor does not utilize brushes in its operation?
• In capacitors connected in parallel, how is the total capacitance calculated?
• What is the frequency of an air-conditioning unit that completes 60 alternating cycles per second?
• What does the term 'DC' stand for in electrical terminology?
• Which of the following is true about a Light Emitting Diode (LED)?
• What unit is used to measure capacitance?
• How is voltage applied in each branch of a parallel circuit?
• What is the electrolyte used in a lead plate storage battery?
• What does a delta connection in electrical circuits refer to?
• Which option is an example of a unit measuring power in electrical circuits?
• What material is typically wrapped around to create soft-iron coils?
• What measures the storage of energy in a capacitor?
• What is the SI unit equivalent of electric charge?
• In electrical terms, what does the term "load" refer to?
• What is the significance of holding a wrench at 15 degrees?
• What is the primary function of a wattmeter?
• What does the term wattage refer to?
• What is the measurement unit for a wattmeter?
• What is a semiconductor?
• What constitutes one kilowatt-hour (kWh)?
• Which statement about current flow is true?
• Which instrument is used for precise linear measurements?
• What type of wave is produced by alternating current?
• What are inductors primarily used for?
• How is one watt-second defined?
• What is the typical role of a power transformer?
• What does a micrometer measure?
• What is the resistance of a bathroom heating unit that draws 10 amperes at 115.5 volts?
• Which type of material has at least a half-full valence shell?
• What is the relationship between amperage and voltage in the power formula?
• What do we understand by the term 'frequency' in electrical systems?
• What instrument would be best for measuring the small gap between relay contacts?
• What is the primary function of an RC circuit?
• Which type of energy conversion could be performed by a lighting lamp?
• In which direction does current flow within an electrical circuit?
• What describes Alternating Current (AC)?
• Which measuring tool is used to measure distances in flooring plans?
• What unit measures electrical resistance?
• How many coulombs constitute one ampere passing a given point in one second?
• How many watts are equivalent to one horsepower?
• What does the term "microfarads" measure?
• In a series circuit, what is the total resistance if the individual resistances sum to 7 ohms?
• What instrument is best suited for accurately checking the diameter of a reamed hole?
• In what unit is inductance measured?
• How do you calculate total capacitance when capacitors are connected in series?
• Which trigonometric function corresponds to the definition SIN in the SOH CAH TOA triangle?
• Which tool is the correct choice for bending a 2-inch diameter conduit?
• Which material is commonly used as an electric heating element?
• What is the purpose of grounding in electrical circuits?
• What does the prefix 'Mega' denote in terms of numerical value?
• In a right triangle, which side is represented by 'c' in the Pythagorean Theorem?
• Why is it important to measure the ripple frequency in a power supply?
• What is a short circuit?
• What does magnetic flux measure?
• What standard does a wire gauge indicate?
• Which instrument is used to accurately measure the resistance of a 47,000 ohm resistor?
• Which of the following best describes a characteristic of semiconductors?
• Capacitors are primarily rated in which unit?
• Which component converts AC to DC?
• Which type of electrical circuit often uses a transformer?
• What is the role of the base terminal in a transistor?
• Which type of device is a transistor?
• What is the function of an architect's scale?
• According to Cal OSHA, which is considered high voltage?
• What is a key property of capacitors?
• What distinguishes a preset variable resistor from other variable resistors?
• What is the primary function of a planimeter in engineering?
• What is a Wheatstone Bridge used for?
• What is the primary function of a transistor in a circuit?
• What does the term 'ampere' measure?
• Which of the following factors can affect the resistance of a conductor?
• Which of the following switches is likely used for a doorbell?
• What is the SI unit of power?
• What does an increase in current do to the strength of a magnetic field?
• What is the primary use of diagonal pliers?
• What is an antenna primarily used for?
• What is the primary function of a transistor?
• What is the purpose of a frequency meter?
• What happens to the equivalent resistance when resistors are connected in series?
• What unit is used to measure electrical resistance?
• What measurement unit is used to express resistance in electrical components?
• How does energy transfer occur in a transformer?