Dưới đây là một số câu hỏi tham khảo cho các bạn học Tiếng Anh Chuyên nghành Kỹ Thuật Điện, chỉ mục đích là tham khảo không có mục đích gì khác:
Câu 1 : The unit of the active power is
Watt-Hour
Volt-Ampere Reactive
*Watt
Volt-Ampere
Câu 2 : The unit of the reactive power is
Watt-hour
Watt
*Volt-Ampere Reactive
Volt-Ampere
Câu 3 : The unit of the apparent power is
Watt-hour
Watt
*Volt-Ampere
Volt-Ampere Reactive
Câu 4 : The unit of electric resistance is
Siemens
Tesla
*Ohm
Coulomb
Câu 5 : The unit of charge is
Siemens
Tesla
*Coulomb
Ohm
Câu 6 : The unit of conductance is
Ohm
Tesla
* Siemens
Coulomb
Câu 7 : Ampere is the unit of
Impedance
Voltage
*Current
Energy
Câu 8 : Ohm is the unit of
Current
Voltage
* Impedance
Energy
Câu 9 : Joule is the unit of
Impedance
Voltage
*Energy
Current
Câu 10 : Volt is the unit of
Electric Circuit
Electric Current
*Potential Difference
Volt-meter
Câu 12 : Ampere is the unit of
Electric Circuit
Voltage
* Electric Current
Volt-meter
Câu 13 : Write out V 1 = V 2 + V 3 in full
Voltage one equals Voltage two plus Voltage three
V one equal to V two plus V three
*V one equals V two plus V three
Voltage one equals Voltage two minus Voltage three
Câu 14 : Write out V 2 + V 3 = V 1 in full
Voltage two plus Voltage three is equal to Voltage three
V one equals V two plus V three
*V two plus V three is equal to V one
V two plus V three equal to V one
Câu 15 : The symbol of resistance is
Z
L
*R
X
Câu 16 : The symbol of electric current is
Z
V
*I
P
Câu 17 : The symbol of potential difference is
Z
I
* V
P
Câu 18: A source e.m.f of 5V provides a current of 5A for 1minute. How much energy is
provided in this time?
250J
150J
*1.5kJ
25J
Câu 19: A resistance of 5k ohm has a conductance of?
2S
0.2kS
*0.2mS
2mS
Câu 20: Write out R 2 + 15Ω = R 1 in full
Resistance two plus fifteen ohms equals resistance one.
R one minus R two equals fifteen ohms.
* R two plus fifteen ohms is equal to R one.
R two plus fifteen multiplied by ohm is equal to R one.
Câu 21: Write out R 2 + 15Ω = R 1 in full
Resistance two plus fifteen ohms equals resistance one.
R one minus R two equals fifteen ohms.
*R two plus fifteen ohms is equal to R one.
R two plus fifteen multiplied by ohm is equal to R one.
Câu 22: “The sum of I one, I two, and I three equals I four” is the full expression of
I 1 + I 2 & I 3 = I 4
I 4 = I 1 + I 2 + I 3
*I 1 + I 2 + I 3 = I 4
I + 1 + I + 2 + I + 3 = I 4
Câu 23: “I one plus I two equals four fifths of I three” is the full expression of
I 1 + I 2 = I 3
I 1 + I 2 = I3
*I 1 + I 2 = I 3
I 3 = I 1 + I 2
Câu 24: Write out P = VIcos in full
The active power equals the product of the voltage, the current, and power factor.
P equals to the product of V, I, and cos.
*P equals the product of V, I, and cos.
P equals the product of V, I, c, o, s, and .
Câu 25: Write out Y = in full
The reciprocal of Z is equal to Y.
Z is equal to the reciprocal of Y.
* Y is equal to the reciprocal of Z.
The admittance is equal to the reciprocal of the impedance.
Câu 1: Generation of electricity is a process whereby electrical energy is obtained from some other form of …...
oil
fuel
* energy
water
Câu 2: Generation of …… is a process whereby electrical energy is obtained from some other form of energy.
heat
fuel
* electricity
steam
Câu 3: A battery of e.m.f of 12 V supplies a current of 10 A for 6 minutes. How much energy is supplied in this time?
12 VAh
* 720 VAh
7200 VAh
20 VAh
Câu 4: A current of 5 A flows through a conductor and 10 W dissipated. What voltage exists across the ends of the conductor?
*2 V
50 V
0,5 V
0,2 V
Câu 5: A conductor has a conductance of 0.1 S. It’s resistance is:
* 10 Ω
1 Ω
0.1 Ω
1 mΩ
Câu 6: A conductor has a resistance of 10 Ω. It’s conductance is:
* 0.1 S
10 S
0.1 mS
1 S
Câu 7: What is the unit of electromotive force?
Coulomb
*Volt
Ohm
Ampere
Câu 8: What does the “potential difference” mean?
A change in resistance between two points in an electric circuit.
A change in power between two points in an electric circuit.
A change in electric current between two points in an electric circuit.
* A change in electric potential between two points in an electric circuit.
Câu 9: What is the power factor?
The ratio of apparent power to reactive power.
The ratio of apparent power to active power.
The ratio of reactive power to apparent power.
*The ratio of active power to apparent power.
Câu 10 What is the unit of mutual inductance?
Farad
Siemens
Ohm
*Henry
Câu 11: What is the rated frequency of Vietnam electric power system?
32 GW
400 V
500 kV
* 50 Hz
Câu 15: Which equipment is used to produce electricity?(thiết bị dùng để sản xuất điện)
A transformer
A motor
A cable
*A generator
Câu 16: ............ convert the energy stored in the fuel (mainly coal, oil, natural gas, enriched uranium) or renewable energies (water, wind, solar) into electric energy.
Transformers
Consumers
Substations
* Power plants
Câu 17: Cogenerators are facilities that utilize heat for ........ electricity and for another form of useful thermal energy (steam or hot water).
distributing
maintaining
consuming
*generating
Câu 18: Conventional generators produce electricity at a ............ that is a multiple of the rotation speed of the machine.
power
voltage
current
* frequency
Câu 19: Where electricity is generated?
In transmission lines
In transmission substations
In distribution substations
* In power plants
Câu 20: What are the norminal voltages of the transmission system in Vietnam?
22 kV, 35 kV
6 kV, 10 kV
220 V, 380 V
* 220 kV, 500 kV
Câu 21: Generation, transmission and distribution system are parts of .........
a consumer
a power plant
a substation
* an electric power system
Câu 22: What is the electric power system?
Lines and transformers
Transmisstion systems
Loads
* A very large network that links power plants to loads
Câu 23: Generators provide nearly all of the ………. for electric power grids.
frequency
current
voltage
* power
7: Four letters c in “The 4C approach to successful business writing” stand respectively for ...
Complex, Concise, Correct, and Courteous
Countable, Concise, Correct, and Comprehensive
* Clear, Concise, Correct, and Courteous
Correlative, Clear, Concise, and Corect
câu 1: the current in a wire………….
depends only on the resistance of the wire
does not depend on resistance and potential difference
depends only on the potential difference applied
*depend on both resistance and potential difference
câu 2: one kilowatt hour of electrical energy is the same as……..
36 x 10⁵ B.T.U
36 x 10s ergs
36 x 10⁵ watt
*36 x 10⁵ joules
Câu 3: In the Internation System of Units, the unit of conductance(điện dẫn) is ........
Volt
Farad
Ohm
* Siemens
Câu 4: The instantaneous values of a sinusoidal waveform is given by the formula :
Vi= Vmaxtgot
Vi= Vmaxcosωtsinωt
Vi=Vmaxcosωt
*Vi= V maxsinωt
Câu 5: For any node in ............, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node; or equivalently:
Counter
Electric power plante
An winding
*An electrical circuit
Câu 6: The Hertz is defined as:
Minutes per cycle
Seconds per cycle
Cycles per one minute
*Cycles per one second
Câu 7: A coil of inductance 150mH and zero resistance is connected across a 100V, 50Hz supply. The current flowing through the reactance is :
2,72A
2,21A
2,27 A
*2,12A
Câu 8: A coil which has an inductance of 40mH and a resistance of 2Ω is connected together to form a LR series circuit. If they are connected to a 20V DC supply. Which is the final steady state value of the current ?
1A
*10A
0,1A
100A
Câu 9: What will be the value of a capacitor in farads when it has a capacitive reactance of 200 Ω and is connected to a 50Hz supply.
15,29uF
12,59uF
19,22uF
*15,92uF
Câu 10: In power system, which of following statements is correct ?
* The device which takes electrical energy is known as the electric load
The source which generate electrical energy is known as the electric load
a dam is considered as a load
a transformer being separed from the power network is considered as a load
Câu 11 : Hydroelectric power plants used water flowing directly through the turbines to power the
Boiler
*Generator
Reactor
Dam
Câu 12: Filaments of electric bulbs are usually made of ………….
Nichrome
*Tungsten
Copper
Carbon
Câu 13: ………..converts mechanical power supplied by the turbine into electrical power.
The motor
* The electric generator
Transformer
Alternator
Câu 14 : ............... are used to "transform" voltage from one level to another.
Motor
Generator
*Transformer
Insulator
Câu 15 : Resistance of a wire is R ohms. The wire is stretched to double its length, then its resistance in ohms is
R/4
4R
*R/2
2R
Câu 16: Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them are in the ratio :
2:1
* 1:2
1:1
4:1
Câu 1: Four cells each of e.m.f 'E' are joined in parallel to form a battery. The equivalent e.m.f of the battery will be …………..
4E
*E
E=0
E/4
Câu 2: Three 3 ohm resistors are connected to form a triangle. What is the resistance between any two of the corners?
3/4 ohms
* 2 ohms
4/3 ohms
3 ohms
Câu 3: The power factor is a ratio of ……...
Real power to reactive power
*Real power to apparent power
Reactive power to apparent power
Reactive power to real power
Câu 4: A circuit contains two un-equal resistances in parallel
smaller resistance has smaller conductance
*potential difference across each is same
large current flows in larger resistor
current is same in both
Câu 6: A coil of inductance 150mH and zero resistance is connected across a 100V,
50Hz supply. The inductive reactance of the coil is:
41,72Ω
*47,12Ω
47,72Ω
42,17Ω
Câu 7: A coil which has a resistance of 2Ω is connected to a 20V DC supply. Which is the value of current?
1A
* 10A
0,1A
100A
Câu 8: Calculate the capacitive reactance value of a 220nF capacitor at a frequency of 1kHz.
734,2Ω
*723,4Ω
744,2Ω
732,2Ω
Câu 9: In the alternative current circuit, which of following statements is correct?
The voltage across a capacitor leads the current by 90°.
* The voltage across a capacitor lags the current by 90
The voltage across a capacitor in phase the current
All 3 statement above are true.
Câu 10: Electrical generating is concerned with ………….
Planes
*Power station
Cables and switchgear
Roads and bridges
Câu 11 : When there is an electric current passing through a wire, the particles
moving are ..............
Ions
Molecules
* Electrons
protons
Câu 12: Electric generators transform kinetic energy(động năng) into electricity.
Renewable energy
* Classic energy
Kinetic energy
Potential energy
Câu 13: Which one is the classic energy sources used in electrical power generation.
* Hydroelectric energy
Solar
Wind
Distributed generation
Câu 14: Which kinds of fuels(nhiên liệu) are used in the thermal power plant for generating electricity?
Water
* Coal
Solar
Tidal Harnesses
Câu 15: Resistivity of a wire depends on ...........
Material
*Length
Cross section area
None of the above
Câu 16: Kirchhoff's second law is based on law of conservation of ...
Momentum
*Energy
Mass
Speed.
Câu 1: Which type of substation is usually located near power plants ?
Distribution substation
Step-down transmission substation
Step-up transmission substation
* Generation substation
Câu 2: Which type of substation is usually located near consummers ?
Generation substation
Step-down transmission substation
Step-up transmission substation
* Distribution substation
Câu 3: The ......... substations are constructed in the open air.
underground
distribution
indoor
* outdoor
Câu 4: One of the fuctions of a substation is to?
convert electrical energy into mechanical energy
consume electricity
generate electricity
* change voltage from one level to others
Câu 5: Substations usually consist of following devices:
photovoltaic panels
damps, turbines
thermal generators, motors
* transformers, insulators, and circuit breakers
Câu 6: Which devices are used to interurpt short-circuit currents in the power system?
Current transformers
Voltage transformers
Isolators
* Circuit breakers
Câu 7: An electrical substation plays an important role in the electrical system as it acts as a bridge in transferring the electricity from the power plant to ......
systems
motors
power plants
* consumers
Câu 8: A distribution substation .......... voltage to a value suitable for local loads.
supports
increases
remains
* reduces
Câu 9: In switching substation, there is not any .......
insulator
isolator
circuit breaker
* transfomer
Câu 10: The power from ............. substations is distributed to industrial, commerccial, and residential customers.
generation
power
transmission
* distribution
Câu 11 : .......... substations are built in urban areas to decrease the noise from the transformer for reasons of appearance, or to protect switchgear from extreme climate or pollution conditions.
Distribution
Transmission
Outdoor
* Indoor
Câu 12 : In ............, voltage is changed for transmission and distribution.
inductrial factories
commercial centers
power stations
* substations
Câu 13: In transmission substations, the ........... is stepped up for transmission.
capacitance
power
current
* voltage
Câu 14: What is the main purpose of a distribution substation?
to convert mechanical energy into electricity
to generate electricity
to transfer power from the distribution system to the transmission system
* to transfer power from the transmission system to the distribution system
Câu 15 : What is the main purpose of a transmission substation?
to convert mechanical energy into electricity
to generate electricity
to transfer power from the distribution system to the transmission system
* to connect various transmission lines together.
Câu 16 : Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial ....
people.
administrators.
operators.
* customers.
Câu 17 : Smaller distribution stations may use ............ or fuses for protection protection of distribution circuits
Isolators
arrestors
Disconnect switching devices
* recloser circuit breakers
Câu 18 : Other devices such as capacitors and ......... may also be located at a substation
cooling tower
governer
current regulators
*voltage regulators
Câu 19: Earth ....... at a substation can cause a ground potential rise
disconnection switch
devices
wires
* faults
Câu 20 : Where a substation has a metallic fence, it must be properly ........, to protect people from this hazard.
distributed
isolated
maintained
* grounded
Câu 23 : If all of the plant's main generators are shut down, station service power is supplied by drawing power from the .... through the plant's transmission line.
* plant's distribution line
* power transformer
* grid
* feeder
Câu 24: The electric power which ...... is stepped up to a higher voltage at which it connects to the transmission grid.
* are generating
* generates
* is generated
* transformer
Câu 25 : Electronic power conditioning and control of the production and distribution of electricity .... important aspects of the smart grid.
* is
was
are
were
Câu 26 : Generation of electricity is a process whereby electrical energy is obtained from other form of ......
oil
fuel
* energy
water
Câu 27 : Generation of ...... is a process whereby electrical energy is obtained from some other form of energy
heat
fuel
* electricity
steam
Câu 28 : A substation is a part of an electrical ......., transmission, and distribution system.
generator
generating
* generation
power plant
Câu 29 : Power grid includes particular installations, substations, lines or cables for transmitting and ...... of electricity.
generating
distribution
* distributing
generation
Câu 30 : An electric grid or power grid is an interconnected network for ........ electricity from producers to consumers.
generating
changing
* delivering
consuming
Câu 1:............... is a structure used in electric power transmission and distribution to transmit electrical energy across large distances.
A generator
A capacitor bank
* An overhead power line
Câu 2: An overhead power line consists of one or more conductors suspended by ....... or poles.
isolators
capacitors
resistors
* towers (cột điện)
Câu 3: Since most of the ......... is provided by air, overhead power lines are generally the lowest-cost method of power transmission for large quantities of electric energy.
tranformation
distribution
conduction
* insulation
Câu 4: .......... must support the conductors and withstand both the normal operating voltage and surges due to switching and lightning.
Turbines
Transformers
Generators
* Insulators
Câu 5: The most common conductor in use for transmission today is ..........
copper bar
lightning cable
power cable
* aluminum conductor steel reinforced (ACSR).
Câu 6: The ground conductor is usually grounded at the top of the supporting structure, to minimize the likelihood of direct ......... to the phase conductors.
overload currents
under voltage sags
short circuit currents
* lightning strikes
Câu 7: Power ......... comprise a number of conducting cores of copper or aluminium, insulation, and armouring.
towers
insulators
bare wires
* cables
Câu 8: In transmission substations, the ........... is stepped up for transmission.
capacitance
power
current
* voltage
Câu 9: Residential customers are supplied with .......... levels of 220/380 V
potential
electromotive force
current
* voltage
Câu 10 : ........... is a device designed to detect the faults in the power system.
Boiler
Current transformer
Turbine
* Protective relay
Câu 11 : .......... carry power from the generators to the loads.
Inductors
Resistors
Capacitors
* Conductors
Câu 12: An electric current running through a wire produces ... around the wire
an electromanet
a current
* a magnetic field
an electric field
Câu 13: What is the main purpose of a transmission substation?
to convert mechanical energy into electricity
to generate electricity
to transfer power from the distribution system to the transmission system
* to connect various transmission lines together.
Câu 14: .......... is used to provide isolation.
A transformer
A gennerator
A circuit breaker
* An isolator
Câu 15 : The reverse conversion of electrical energy into mechanical energy is done by an electric.........
transformer
gennerator
circuit breaker
* motor
Câu 16 : .......... is the stationary part of a generator.
Drive shaft
Armature
Rotor
* Stator
Câu 17: Primary of a ........... is connected in series with the power circuit.
boiler
turbine
votage transformer
* current transformer
Câu 18: Primary of a ........... is connected in parallel with the power circuit.
boiler
circuit breaker
current transformer
* votage transformer
Câu 19 : ........ feeds power from one point to another without being tapped from any intermediate point.
Transformer
Circuit breaker
Generator
* Feeder
Câu 20 : The consumer in the ....... electrical distribution system will be in darkness if feeder or transformer are failured.
double-feed
loop
ring
* radial
Câu 21 : Ring network is fed by more than one..........
consummer
bus
circuit breaker
* feeder
Câu 22: Motor converts electrical energy into ....... energy.
solar
wind
chemical
* mechanical
Câu 23: ......... does not readily release electrons
Cooper
Aluminum
Steel
* Rubber
Câu 24: Electrical installation is concerned with ........
power stations
factories
roads and bridges
* cables and switchgears
Câu 25: Electric power network includes particular installations, substations, lines or cables for the transmission and distribution of………...
heat.
water.
* electricity.
energy.
Câu 27: Substations may be owned and .... by an electrical utility.
operating
operation
* operated
operators
Câu 28 : Substations may be owned by a large industrial or ....... customer.
commercing
commerces
* commercial
commerced
