NEIEP Power and Logic (700) Practice Test

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• What happens to the resistance of a conductor as its temperature increases?
• What determines the direction of elevator movement?
• What does the term "reactive power" signify in electrical systems?
• What are self-excited generators with shunt and series fields called?
• In electrical design, what can imbalance in load distribution lead to?
• What does a phase shift in AC circuits indicate?
• What device is used to measure volts, ohms, and milliamperes?
• What is the primary effect of connecting a collapsing field across a coil?
• What type of power is necessary for establishing electric fields in inductive loads?
• What device protects hydraulic elevator motors from damage?
• Where is the neutral wire connected in a three-wire system?
• Which method converts AC to DC and produces direct current?
• What type of electrical safety device can be used to protect sensitive instruments during maintenance?
• What is the role of silicon fluid in a dashpot overload?
• What type of device acts as a circuit breaker that trips with a shunt?
• What component stops the elevator from moving too far past landings?
• What distinguishes DC generators from motors?
• What is a common application of an inductor in a circuit?
• Which component is essential for troubleshooting controller problems?
• Which component is specifically referenced for avoiding chatter in AC relays?
• What is not a characteristic of a broken tape switch?
• What is a method used to control elevator speed and movement by varying strength?
• In electrical systems, what does a VOM multimeter typically measure?
• What is the primary purpose of a ground fault circuit interrupter (GFCI)?
• What is an essential step in assessing load distribution?
• Which devices convert AC to DC specifically for motor control?
• Why is it important to understand voltage drop in circuits?
• Which method can achieve door reversal in an elevator system?
• What component is commonly used in a three-phase full-wave power supply?
• At what speed does a synchronous motor operate?
• Which components are found in a resistor-capacitor (RC) circuit?
• What is the main function of an inductor in an electrical circuit?
• What role does a capacitor play in an AC circuit?
• Which issue is likely to cause a decrease in DC voltage in a rectifier?
• Which circuit type uses contact-based logic for determining operations?
• What is the main purpose of a circuit breaker?
• What is a primary purpose of low oil timers in hydraulic systems?
• How is the electrical power consumed by a circuit best expressed?
• What is the role of circuit protective devices?
• What refers to the maximum voltage and current that can be safely interrupted?
• Which type of motor protection is designed to prevent damage due to locked rotor conditions?
• What is the primary function of a power supply in electronic circuits?
• What controls hydraulic valves in elevator systems?
• How can engineers mitigate the risks associated with load distribution?
• What does "electrical isolation" refer to?
• In a three-phase system, what does the power factor (PF) represent?
• What can excessive load on a circuit cause?
• What are current limiting devices for electrical circuits called?
• Which device is best known for providing current limiting in electrical circuits?
• What kind of system allows for call reversal in elevators?
• What information does a wiring diagram provide?
• What describes the improvement in AC motor elevators compared to DC motor elevators?
• What safely discharges electrical energy from a capacitor?
• Which circuit component is known for increasing the efficiency of a power supply in a three-phase system?
• In a regulated power supply, what is the main benefit of using an exciter?
• What type of relay design is characterized by a plug-type configuration?
• How are safety switches wired for relay operation?
• What may result from an overloaded circuit?
• What moves with the elevator via an attached cable or steel tape?
• What does the term "load factor" indicate?
• What consists of two coils wrapped in opposite directions?
• Why is it important to consider load distribution when designing an electrical system?
• What is the main purpose of bypassing in electrical circuits?
• Which organization regulates elevator operations in the United States?
• What does "current leakage" in an electrical system imply?
• What is a common practice in load distribution for large electrical systems?
• What is used for tripping time control in timers by utilizing oil flow?
• Which safety measure is essential when working with electrical systems?
• Transformer efficiency measures what aspect of a transformer?
• What is the purpose of a duplex system in elevator operation?
• What is typically similar across elevator systems but differs in input/output functions?
• What is meant by the term "short circuit"?
• What control method ensures that an elevator system does not change direction until the highest call is answered?
• What does inductive reactance measure in an electrical circuit?
• What is connected in series with the hoist motor armature in an elevator system?
• What should engineers analyze to ensure effective load distribution?
• What typically causes capacitor failure in electrical systems?
• What technique involves dispatching elevators to different building levels for quicker service?
• What is a "test load" used for in electrical testing?
• What feature relates to the emergency operation of elevator systems during a fire?
• What action typically initiates door operation in an elevator system?
• What does a dashpot overload typically contain?
• Which type of circuit is designed to reverse a generator's self-excited field?
• Which method is used to control the hoist motor in static drives?
• What system is described to help increase responsiveness in elevator services?
• Which type of elevator control does not switch until all calls in one direction are answered?
• What type of timers are adjusted by dip switches for time settings?
• What is one major risk of inadequate load distribution?
• What distinguishes synchronous motors from asynchronous motors?
• What switch type is not commonly used on hydraulic elevators?
• What does the term 'electromagnet' refer to in the context of relays?
• A test load is crucial for evaluating what aspect of electrical equipment?
• What is the stopping distance for an elevator car traveling at 100 FPM?
• What is the result of uneven load distribution on electrical circuits?
• What is a characteristic of a relay that is held in with its own contact?
• Which device is characterized by its capability to keep contacts switched on without needing constant power?
• To what does the term 'bypassing' specifically apply?
• What is the definition of impedance in an AC circuit?
• In electrical systems, what is the difference between single-phase and three-phase power systems?
• What device is specifically used to measure insulation resistance?
• What is a potential consequence of not using a low oil timer in hydraulic elevators?
• When might it be essential to utilize a wiring diagram?
• Which device primarily protects against ground faults in electrical circuits?
• What is primarily monitored to avoid damage in hydraulic elevator systems?
• What is the primary purpose of load distribution in electrical design?
• How can contact arcing be reduced in a circuit?
• What aspect of energy usage does the load factor specifically assess?
• Which type of wiring system is commonly used in residential buildings?
• How is a kilowatt-hour defined?
• How does effective load distribution contribute to a system's performance?
• What prevents the elevator from quickly reversing direction?
• What is the term for selectors with two electrically connected motors?
• Which component is not typically used for supplying voltage in elevator systems?
• What is the significance of the power factor in electrical systems?
• What is the primary function of relays in elevator systems?
• Which device allows current to flow in only one direction?
• In electrical theory, what does reactive power refer to?
• What occurs when a circuit is overloaded?
• Which type of motor often requires special handling during installation due to its design?
• VVVF modifications are primarily used to improve what aspect of AC drives?
• What is a combination of an AC motor and a generator called?
• How do you calculate the total resistance of three resistors in series with values of 2Ω, 4Ω, and 6Ω?
• What is a key safety feature of grounding in electrical systems?
• How does electrical noise impact circuit performance?
• What prevents simultaneous opposite electrical functions in a circuit?
• What is a likely problem when a relay coil won't pull in?
• How is electrical power in a three-phase system calculated?
• In what way does a digital multimeter differ from an analog multimeter?
• What type of relays can be reset electrically?
• What happens when a fuse melts in an electrical circuit?
• Which system uses switches actuated by cam or vane for elevator operation?
• What is a key factor that influences strategies for load distribution?
• Where are relays typically mounted for their insulation and durability?
• Which term best describes the balanced spread of electrical loads across circuits?
• What is the primary purpose of a diode in an electrical circuit?
• Which brakes are considered inferior to DC brakes in elevator systems?
• How does a relay function in an electrical system?
• What type of rectifier is used to supply voltage for a door operator through AC to DC conversion?
• What effect does an increase in frequency have on inductors?
• Which type of motor is known to run at a constant speed?
• What is generated by a relay coil to pull the armature?
• How does an analog multimeter present measurements?
• How can you convert milliamperes to amperes?
• What does a lower transformer efficiency indicate?
• Which of the following is not a benefit of proper load distribution?
• What provides the appearance and location of elevator parts?
• What term describes the rubbing motion used to keep relay contacts clean?
• In elevator systems, what is the primary role of a triplex configuration?
• What is a load bank primarily used for?
• What do schematic diagrams use to represent electrical connections?
• What requires adjustment and lubrication for proper operation in elevator systems?
• Which type of relay is commonly used for circuits on solid-state equipment?
• How does Ohm's Law relate voltage, current, and resistance?
• Which device is commonly used in machine rooms with sprinkler systems?
• What happens when the coil of a relay is energized?
• What type of diagram uses lines and symbols to represent electrical circuits?
• What does a construction plan for elevator service typically include?
• What type of relay design prevents multiple relays from energizing simultaneously?
• Which of the following best describes the role of a neutral wire?
• What component is used to store and discharge electrical energy?
• What is the primary function of a transformer in an electrical system?
• What type of diagrams detail the wiring for electrical circuits?
• Which term describes using two contacts of the same relay in series?
• What is essential when the resistance range setting of an analog meter is changed?
• What is an advantage of using digital meters over analog meters?
• When should you ideally use a circuit breaker instead of a fuse?
• Which electrical component is primarily responsible for initiating a magnetic field in relay systems?
• What can cause inductors to behave differently in terms of inductive reactance?
• What are harmonics in an electrical system?
• Which assembly is used for selectors that utilize multiple stacks?
• What is the function of a check valve in hydraulic systems?
• What is the primary purpose of using a straight-line wiring diagram?
• Which device is used to increase or decrease voltage in an electrical circuit?
• What is a common issue caused by AC cycle reversal?
• A device draws 10A at 120V. How much power does it consume?
• What allows an elevator to register and hold calls in the opposite direction during an emergency?
• What is the main function of a wattmeter?
• What mechanism prevents an elevator from receiving a stopping signal when it is too close?
• What hydraulic components are available in various lead configurations?
• What does grounding in electrical systems primarily connect to?
• What safety feature prevents a hydraulic elevator piston from descending?
• Which method is commonly used for efficient motor starting in high-capacity applications?
• What is meant by the term "voltage drop" in an electrical circuit?
• What distinguishes AC current from DC current?
• What does load distribution help to prevent in electrical systems?
• What type of device produces almost pure DC voltage in a regulated power supply?
• What configuration is used when three elevators share the same hall call button riser?
• What is the primary function of a capacitor in an electrical circuit?
• What role does a surge protector serve in electrical circuits?
• When is the inductive reactance highest in an inductor?
• What type of electrical component is primarily used in static drives for motor control?
• Current leakage is primarily a concern because it can lead to what?
• What does the calculation P = V x I help determine?
• Which of the following devices would be used to convert alternating current for specific motor applications?
• Which of the following elements serves to protect circuits in electrical systems?
• What is the primary function of a fuse in an electrical circuit?