SEPTA Electrician Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement best defines a diode?
• BJT is suitable for which of the following roles?
• What is the relationship between gear size and torque and speed?
• What is the primary function of a relay in an electrical circuit?
• Which device converts DC to variable frequency AC?
• Which NEC article covers fire-alarm systems?
• Which NEC article specifically covers electric rail systems?
• Which process of connecting the electrical system or equipment to the earth to safely dissipate fault current and stabilize voltage levels?
• Rigid Conduit is also known as what?
• Frequency units?
• Which statement correctly describes the relationship between inductance and magnetic fields?
• THHN/THWN conductors are typically used for what insulation type?
• In series, which statement about charge and voltage is true?
• How many amps are in 1 milliamp?
• What term describes a system that provides backup power to essential loads when the main supply fails?
• What is the rotor in an electric motor?
• What powers lights, doors, and controls when the main power is offline?
• Which circuit type is common in batteries and low-voltage systems?
• Which type of circuit is described as having current that flows in different directions and is used in single-phase or three-phase systems, more efficient for long-distance transmissions?
• A device uses 2500 milliwatts. How many watts is that?
• What does the commutator do in DC motors?
• Multirange Voltmeters are designed to use one meter movement to measure several ranges of voltage.
• Which device is used to control the speed of AC motors by adjusting the frequency of the supply?
• Which device uses a taut band suspension and is designed to detect very small currents?
• What is the primary winding connected to?
• A contactor is best described as
• Compared to the nano prefix, the mega prefix represents a what magnitude relationship?
• Twist-on connectors are called what?
• What is a key characteristic of IGBT devices?
• If kVA is known for a three-phase system, which expression gives current?
• Which process electrically connects metal parts of an electrical system to ensure they are at the same electrical potential?
• Overcurrent protection type?
• Which motor provides good speed regulation?
• Which statement describes a BJT?
• Which statement about the armature is true?
• Which mechanical element is primarily used to change the direction of a force and can provide mechanical advantage when arranged in a block and tackle?
• The isolation transformer provides electrical isolation between windings.
• In DC motors, which component reverses current direction to maintain rotation?
• Rigid Conduit is also known as RMC.
• Power-limited circuits are designed to limit what aspect of power?
• A resistance of 2 kilo-ohms equals how many ohms?
• Which tool is used to apply the correct torque to lugs and terminals?
• Which statement correctly describes DC motors in terms of control?
• How many milliamps are in 1 amp?
• EMT conduit is thin-wall metal conduit.
• In a series circuit, which statement is true about voltage, resistance, and current?
• A rheostat is a variable resistor used to control the flow of current by adjusting resistance.
• On a tagout record sheet what signature is only required when personnel other than the ships force are involved with maintenance of the ship?
• How many volts are in 1 kilovolt?
• What distinguishes contactors from standard relays?
• What are brushes in DC motors used for?
• Ground-fault protections provided by?
• Analog meters are characterized by using a point and scale to indicate values.
• How many milliwatts are in 1 watt?
• Which mechanism changes the direction of force or multiplies it to lift loads?
• Which device is used to measure resistance by applying a test current and reading voltage drop?
• Which instrument would you use to verify electrical continuity by measuring resistance?
• Which device provides ground-fault protection?
• What is the armature in an electric machine?
• What is the function of a resistor?
• Which tool is used to confirm the absence of voltage before work?
• Which transformer increases voltage from primary to secondary?
• An isolation transformer has which winding characteristic?
• What is the correct description of DC motors?
• Which statement describes a Synchronous Motor?
• What term describes locking a switch or breaker in the off position before working on it?
• Which term refers to the electrical potential difference between two points?
• What is the purpose of laminating the transformer core?
• What is inductance in an electrical circuit?
• Which device runs directly from DC power?
• Which of the following is an application for DC motors?
• What is the core typically made of to reduce eddy currents?
• MC cable is a type of what?
• Which device is used to support the rotor and allow smooth rotation?
• Gear ratio is determined by which factor?
• What is the primary purpose of flexible conduit?
• Which statement about gears is correct?
• Which hand tool is used to remove insulation from wires?
• Which DC motor is known for good speed regulation?
• Which statement best describes ground and bonding?
• The essential components of motor starters typically include
• A power factor meter measures what aspect of electrical power usage?
• Which characteristic primarily describes IGBT switching behavior?
• Inductive Reactance formula?
• Which instrument is used to test insulation resistance?
• Which item is NOT listed as essential PPE for electrical work?
• Which NEC article addresses emergency power systems?
• What quantities does an LCR meter measure?
• Terminal block is used for what?
• Which device is used to detect voltage presence?
• In a parallel circuit, which statement best describes current, voltage, and branch resistances?
• Which description characterizes a pneumatic system?
• What is the numeric value of the prefix milli (m)?
• Which component provides electrical contact with the rotating commutator?
• Which device is used to switch electrical power with high efficiency for motor control?
• Which DC motor is a mix of series and shunt windings?
• Where are inductors commonly found?
• In three-phase calculations, what is the purpose of the factor 1.73?
• Which statement describes a MOSFET?
• Which device secures large wire splices?
• For a single-phase motor, which expression correctly gives current from horsepower, voltage, efficiency, and power factor?
• What term describes a procedure that ensures energy sources are properly isolated before maintenance?
• Which motor requires an inverter to operate?
• Which instrument would you place in series with a circuit to measure current?
• MOSFETs are commonly used in which type of circuit due to their fast switching?
• What is the function of a capacitor?
• EMT conduit is a type of conduit that is best described as what?
• AC motors are usually brushless and rely on electromagnetic induction.
• Which mechanical device multiplies force to lift or move objects?
• Which method easily controls speed in DC motors?
• Which tool measures current without breaking the circuit?
• Which instrument measures electrical waves and phenomena?
• What is needed for speed control of AC motors?
• Which of the following is NOT a type of gear?
• Among the prefixes k, m, μ, and n, which represents a larger value?
• Which device is commonly used with IGBT in solar systems?
• Isolation transformer is used primarily for what?
• THHN/THWN wire is what type of insulation?
• What component do DC motors use to switch current direction and keep the rotor turning?
• Which meter is designed to be connected directly across the power source and has very high resistance?
• Which device uses a moving coil mechanism to indicate readings in a DC circuit?
• What describes a Compound DC Motor?
• Bearings in mechanical systems are designed to do what?
• Which motor type generally has lower maintenance due to no brushes?
• Which component collects AC from overhead wire?
• 500 mV is equal to how many volts?
• What is the opposite of current?
• For three-phase systems, which formula gives current when horsepower is known?
• In AC power measurement, which instrument is used to measure true power?
• For measuring current without interrupting a circuit, you would use a:
• What term describes the flow of electrical charge?
• What is the value of the mega prefix (M)?
• In parallel, how do capacitors combine and what is the voltage across each capacitor?
• What does a frequency meter measure?
• Which NEC article addresses wiring methods?
• What does a Variable Frequency Drive (VFD) do?
• An isolation transformer is defined by having the same number of turns on primary and secondary.
• Which statement best describes Ohm's Law for a circuit with both series and parallel elements?
• Which meter is used to measure resistance?
• Which component is designed to reduce friction and support rotating components?
• Which tool is used for stripping insulation on the wire?
• What does torque mean in gear systems?
• When a circuit contains both series and parallel components, what is the recommended analysis approach?
• Which term refers to the distance between the teeth?
• The d'Arsonval movement is a moving coil meter and is one of the most common analog meter movements. It is operated on DC circuit.
• Which tool would you use to pull a new wire through a tight conduit run?
• How many watts are in 1 kilowatt?
• Which NEC article governs ground and bonding?
• Which design feature of transformer cores helps reduce energy losses due to eddy currents?
• Which term describes electrical potential, the pressure that pushes charges through a circuit?
• Which practice specifically involves physically isolating energy sources before maintenance?
• Which tool is used to fasten lugs and terminals?
• In a synchronous motor, rotor speed is what relative to the magnetic field?
• A step-down transformer does what?
• Ground clamps used to join multiple ground wires?
• The d'Arsonval movement is a moving coil meter commonly used in which circuit type?
• XL=2πfL defines which electrical property?
• How many ohms are in 1 kilo-ohm?
• An ammeter is a very low impedance device and must be connected in series with the load to measure current.
• What is the numerical value assigned to the nano prefix (n) in this material?
• Which term is defined as the flow of electrical charge?
• If kilowatts are known, which expression gives current in a three-phase system?
• Which motor type typically has higher maintenance due to brushes and commutator wear?
• Flexible conduit is also known as which term?
• Starters in motor control primarily consist of
• What is the purpose of overload protection in motor systems?
• Lubrication systems in machinery serve what purpose?
• In an induction motor, the rotor is induced by what?
• Gears are primarily used to do what?
• Pulleys are used to
• Which tool is used to run wire through conduit?
• What is the stator in an AC motor?
• Which term refers to the distance across the gear?
• For AC motors, speed depends on which factors?
• Which tool is used to bend EMT and other conduit?
• Which component collects 600V DC power?
• Inductance is typically demonstrated by which component, and what does it do?
• MC cable stands for what?
• What is the numeric value of the prefix kilo (k)?
• A step-up transformer does what?
• What is a planetary gear system?
• Which NEC article covers basic installations?
• Capacitive Reactance formula?
• What term is defined as electrical potential, electrical pressure?
• Which is an application for AC motors?
• Which instrument is used to test insulation resistance?
• Which device allows an AC traction motor to operate from a DC source?
• How many millivolts are in 1 volt?
• The wattmeter measures true power in a circuit; two basic types are dynamic and electronic.
• Which tool is used to crimp terminals and lugs onto wire?
• Which tool measures current, voltage, and resistance?
• What is the correct description of AC motors?
• What is the purpose of bearings in a motor?
• What is a characteristic of a Series DC Motor?
• Which motor type is used for high starting torque and traction applications?
• Which NEC article governs power-limited circuits?
• Attaches ground wires to pipes or rods?
• A power rating of 4 kilowatts equals how many watts?
• Which transformer decreases voltage from primary to secondary?
• Which best describes a hydraulic system?
• What is the numeric value of the prefix micro (µ)?
• In Ohm's Law context, a combination circuit should be analyzed by which method?
• What is the secondary winding connected to?
• In a generator, what happens when the armature moves within a magnetic field?
• Which term describes electrically connecting metal parts of an electrical system to ensure they are at the same electrical potential?
• The component that powers lights, doors, and controls when the main system is offline is the:
• Which item secures large wire splices?
• A current of 0.002 A equals how many milliamps?
• What are the common types of AC motors?
• Which gear type is typically used to transmit motion between intersecting axes?