a) System for energy exchange

b) System for transmitting and receiving telecommunications

c) System for ventilation and air conditioning

d) System for power generation

a) Only for lighting

b) Only for additional technological processes

c) For both main and additional technological processes

d) Only for maintaining comfortable working conditions for staff

a) Only message processing

b) Only message transmission

c) Commutation, amplification, transmission, processing, and reception of messages

d) Only equipment maintenance processes

a) Only general-purpose electrical networks

b) Only devices for energy transformation

c) A complex of facilities for power supply, transformation, allocation, regulation, and backup of electrical energy

d) Only AC and DC power supply systems

a) Only general-purpose electrical networks

b) Only devices for input, protection, commutation, and allocation of AC and DC

c) Electrical networks, commutation devices, and energy reserve sources

d) Only standalone sources of energy

a) First, second, and third categories

b) Only the first category

c) Only the second category

d) Only the third category

a) Only batteries

b) Only diesel power stations

c) Batteries and diesel power stations

d) Only guaranteed power supply

a) Only communication equipment

b) Only manufacturing and administrative facilities

c) Systems of illumination, air conditioning, ventilation, heating, and internal electric transport

d) Only backup power supply systems

a) Short-time breaks are allowed

b) Breaks are disallowed

c) Emergency diesel electric power stations are used

d) Batteries are used as a backup source

a) Low cost during installation

b) High resistance to temperature fluctuations

c) Reliability and guaranteed supply

d) Minimal voltage deviation

a) Electro Pulsation System

b) Emergency Power Source

c) Electric Power Station

d) Economic Power System

a) 220/380V AC, 48V DC, and 24/60V DC

b) 110/220V AC, 36V DC, and 72V DC

c) 380V AC only

d) 220V AC and 48V DC

a) Recording chronological order of faults

b) Selective disabling of faulty equipment

c) Monitoring economic indicators

d) Monitoring temperature fluctuations

a) To reduce installation costs

b) To allow expansion of power in the future

c) To minimize power distribution losses

d) To comply with safety regulations

a) Solar panels; charging mode only

b) Diesel generators; discharge mode only

c) Closed or sealed batteries; battery, buffer mode, continuous recharging, and discharge

d) Wind turbines; continuous recharging only

a) Supplied from the main AC network; phase voltage matching working lighting

b) Supplied from backup DC; any voltage level is acceptable

c) Supplied from closed batteries; voltage matching backup DC

d) Supplied from both main and backup sources simultaneously

a) Maximize voltage loss

b) Minimize voltage loss

c) Ignore voltage loss

d) Prioritize current flow over voltage loss

a) Steady-state voltage deviation within ±1% for all voltage levels

b) Voltage level of harmonic component not exceeding 50 mV

c) Ripple voltage on current value not exceeding 50 mV

d) All of the above

a) Building equipment should have a bolt for connection of protective conductor

b) External AC wires should be grounded

c) EPS equipment should be grounded in a five-wire network

d) All of the above

a) To generate electrical energy

b) To support equipment during breaks in the main power source

c) To control and service the electrical network

d) To simplify equipment configuration changes

a) 5 minutes; for reducing inrush currents

b) 30 minutes; for reducing equipment costs

c) 10-15 minutes; for correct switching off of the equipment

d) 2.4 hours; for continuous operation of equipment

a) 5 msec

b) 10 msec

c) 15 msec

d) 20 msec

a) Centralized, distributed, and mixed principles

b) Only centralized principle

c) Only decentralized principle

d) Centralized and decentralized principles

a) Flexibility in changing system configuration

b) Noncriticality to the power of individual consumers

c) Simplicity of implementation

d) Low cost and efficiency

a) Regulation of inrush currents

b) Support of connected equipment with electrical energy

c) Control of electrical network parameters

d) Reduction of power losses

a) Direct conversion of electrical energy into DC current

b) Double-conversion UPS with DC-AC conversion

c) Monitoring and decision-making based on network parameters

d) Re-synthesis of the output voltage

a) To reduce efficiency

b) To increase the cost of UPS

c) To provide an additional voltage regulator network

d) To decrease the speed of response

a) Direct conversion of electrical energy into DC current

b) Double-conversion UPS with DC-AC conversion

c) Monitoring and decision-making based on network parameters

d) Re-synthesis of the output voltage

a) Off-Line

b) Line-Interactive

c) On-Line

d) Double conversion

a) To convert alternating current to direct current

b) To provide electrical power supply to direct current equipment

c) To manage and control network parameters

d) To increase the efficiency of power distribution

a) It leads to the stop of equipment

b) It causes inrush currents

c) It is temporary and reversible

d) It requires the conversion of direct current to alternating current

a) Buffer system and buffer scheme with a separate RB

b) Buffer system and double-beam system

c) Buffer scheme with a stabilized converter and buffer circuit with a volts booster converter

d) Buffer scheme and buffer circuit without stabilizing devices

a) Rectifier device (RD) and Network voltage stabilizer

b) Rectifier device (RD) and Accumulator battery (AB)

c) Voltage booster converter (VBC) and Automatic switch (AS)

d) Inverter (INV) and Capacitor bank (CB)

a) Reduced cost; Lack of flexibility

b) Absence of switching during voltage miss; Increased cost

c) High reliability; Increased cost

d) Simplicity of implementation; Lack of flexibility

a) Rectification of alternating voltage

b) Additional stabilization of output voltage

c) Volts boosting of output voltage

d) Protection against overcurrent

a) Rectification of alternating voltage

b) Reduction of stabilized voltage

c) Increase of voltage in emergency operation

d) Voltage boosting during normal operation

a) To increase the efficiency of power distribution

b) To simplify equipment configuration changes

c) To increase reliability and facilitate maintenance operations

d) To reduce the cost of the accumulator battery

a) Higher specific cost

b) Longer service life

c) Lower specific cost

d) Greater temperature stability

a) To increase voltage

b) To prevent the closing of lead plates

c) To regulate electrolyte concentration

d) To facilitate charging and discharging of the accumulator element

a) To increase the competitiveness of the equipment

b) To reduce the level of reactive power and decrease energy costs

c) To simplify various changes in the equipment

d) To improve the form of the current consumed by devices

a) Sinusoidal current with phase lag

b) Sinusoidal current with phase coincidence

c) Nonlinear current

d) Discharge current

a) Power factor correction at the enterprise level and adjustment at the device level

b) Correction at the device level and adjustment at the enterprise level

c) Power factor correction using reactive power compensators and power factor correction using active harmonic filters

d) Power factor correction using active harmonic filters and correction at the device level

a) Increased power factor

b) Higher device cost

c) Simplified equipment changes

d) Improved competitiveness

a) Increase the level of reactive power

b) Reduce the level of reactive power and thus reduce energy costs

c) Increase energy costs

d) Improve competitiveness

a) High cost

b) Cannot increase power factor in the case of non-linear distortion current

c) Ineffective in reducing reactive power

d) Low reliability

a) Maximum active power

b) Maximum power plant (kVAr)

c) Rated active voltage

d) Number of equipment phases

a) In series

b) In parallel

c) On a "star" scheme

d) In a loop arrangement

a) Lower cost

b) Necessity of qualified staff

c) Simplicity of implementation and application

d) Noncriticality to the power of individual consumers

a) To provide continuous technical monitoring

b) To maintain required thermal conditions

c) To ensure lighting during power supply interruptions

d) To compensate for power factor fluctuations

a) Connecting wires to power sources.

b) Electrically connecting parts of equipment to an earthing device for grounding

c) Installing racks for electrical equipment.

d) Creating a circuit for the transmission of electrical current.

a) Medium with zero potential.

b) Source of electrical energy.

c) Storage place for charge.

d) Conductor to the ground.

a) Grounding for the electrical installation.

b) Protection against overvoltages.

c) Disconnection of electrical equipment.

d) Voltage regulation.

a) Creating conditions for equipment operation.

b) Protecting personnel from electric current.

c) Simultaneous application of working and protective grounding.

d) Linear-cable constructions of the telecommunications network.

a) TN-C, TN-S, TN-C-S, IT.

b) TN, TN-C, TN-S, TT.

c) TN-C, TN-S, IT, TT.

d) TN-C-S, IT, TT, TN.

a) Positive.

b) Negative

c) Both poles.

d) Depends on the equipment.

a) One or several rows of vertical (rarely horizontal) electrodes.

b) One horizontal plate.

c) Long ropes with grounders at the ends.

d) Electrical conductor with built-in sensors.

a) Glass tubes.

b) Steel water pipes.

c) Plastic cable structures.

d) Wooden posts.

a) Only special conductors.

b) Only copper conductors.

c) Only aluminum conductors.

d) Conductors with a cross-section not less than those providing power supply.

a) Voltmeter.

b) Ammeter.

c) Ohmmeter.

d) Faradmeter.

a) Negative

b) Positive

c) Zero

d) Floating

a) To toggle between radio stations

b) To rehabilitate equipment power supply through automatic connection of standby power supply

c) To control traffic signals

d) To generate electrical power

a) Temperature rise, equipment cooling, electromagnetic impulses, pressure surge

b) Voltage boost, current deficiency, insulation perfection, power surge

c) Voltage dump, voltage overload, current overload, insulation defect

d) Frequency deviation, phase shift, harmonic distortion, power factor improvement

a) To create incidents

b) To provide a path for carrier's work

c) To generate electricity

d) To control atmospheric conditions

a) Maximum switch time, reliability of operation, frequent response

b) Minimum switch time, reliability of operation, commutation delay, single response at voltage dump

c) Unlimited switch time, low reliability, quick response

d) Continuous switch time, random response, variable delay

a) Negative

b) Positive

c) Neutral

d) Earth

a) To protect from current overload

b) To increase current flow

c) To regulate voltage

d) To amplify signals

b) Simplicity, high reliability, low cost

c) Multiple applications

d) Complex design

a) Low cost

b) Multiple responses

c) Disposable, need replacement after use

d) Inability to protect against surges

a) Measures temperature balance

b) Measures pressure balance

c) Measures current balance between entering conductors

d) Measures atmospheric conditions

a) Completely grounded neutral with matched zero conductors

b) Separated neutral and zero conductors

c) Grounding through equipment or devices with high resistance

d) Isolated neutral with grounded open conductive parts

a) To amplify electrical signals

b) To provide short circuits

c) To protect against surges by limiting voltage levels

d) To regulate current flow

a) To generate electricity

b) To measure atmospheric conditions

c) To prevent equipment casualties

d) To protect against electric shock

a) To increase harmonic distortion

b) To reduce reactive power and correct nonlinear distortion

c) To control traffic signals

d) To toggle between power sources

a) Active power

b) Voltage levels

c) Reactive power

d) Current flow

a) TN-C

b) TN-S

c) IT

d) TN-C-S

a) Residual Circuit Disturbance

b) Reactive Current Device

c) Residual Current Device

d) Reactive Circuit Disturbance

a) To generate electrical power

b) To measure temperature balance

c) To automatically toggle between power sources

d) To control traffic signals

a) The number of phases

b) The power factor

c) The rated operating voltage

d) The frequency

a) Slower response time

b) Limited voltage levels

c) Inability to protect against surges

d) Faster response time for impulse noise protection

a) To increase electricity bills

b) To minimize peak demands and efficiently use power plant capacities

c) To encourage higher demand on utility infrastructure

d) To promote excess electricity consumption

a) By providing unlimited power

b) Through penalties on excessive demand

c) By reducing power plant capacities

d) By offering free electricity during peak hours

a) A curved power cable

b) A curve representing utility profits

c) A graphical representation of consumer demand against time

d) A curve used in electric circuits

a) To increase simultaneous maximum demand

b) To improve the load factor and reduce maximum demand

c) To encourage higher demand during peak hours

d) To ignore the demand patterns

a) By increasing maximum demand

b) By using more electricity during peak periods

c) By reducing the need for electricity during off-peak hours

d) By eliminating the need for electricity

a) Using electric heaters during peak hours

b) Implementing an ice bank system in the dairy industry

c) Increasing demand during off-peak periods

d) Ignoring load factor improvement

a) To increase maximum demand

b) To save energy during peak hours

c) To encourage excessive electricity use

d) To minimize the load factor

a) By increasing maximum demand

b) By reducing load shedding

c) By switching off non-essential loads when a preset demand is reached

d) By promoting excessive electricity use

a) During off-peak periods

b) At random intervals

c) When demand reaches the peak value

d) During periods of low electricity consumption

a) By increasing the power factor

b) By promoting excessive electricity use

c) By reducing the load factor

d) By eliminating electricity consumption during peak hours

a) Kilo Watts (kW)

b) Kilo Volt-Amperes Reactive (kVAr)

c) Kilo Volts-Amperes (kVA)

d) Watts (W)

a) Capacitive and resistive

b) Resistive and inductive

c) Resistive and conductive

d) Inductive and conductive

a) True power

b) Apparent power

c) Working power

d) Reactive power

a) The ratio of active power to apparent power

b) The ratio of reactive power to apparent power

c) The ratio of apparent power to active power

d) The ratio of apparent power to reactive power

a) By adding more resistive loads

b) By adding power factor correction capacitors

c) By reducing active power consumption

d) By increasing reactive power demand

a) Increase in line and voltage losses

b) Increase in output voltage

c) Reduction in line and voltage losses

d) Decrease in transformer efficiency

a) Ratio of input to output voltage

b) Losses related to magnetic properties of the core

c) Power losses in the transformer windings

d) Percentage relationship between maximum and minimum voltage

a) Ratio of overall maximum demand of the plant to the sum of individual maximum demand of various equipment

b) Percentage ratio of load to transformer's maximum power

c) Ratio of the number of equipment to the total maximum power

d) Ratio of average load to overall maximum load

a) Thermal losses and magnetic losses

b) No-load losses and load losses

c) Core losses and winding losses

d) Electrical losses and voltage losses

a) By changing the number of turns in the winding

b) By using additional windings

c) By altering the current in the winding

d) By changing the transformer's power