200+ câu Trắc nghiệm Tiếng Anh chuyên ngành kỹ thuật điện có đáp án - Phần 6
25 câu hỏi
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
Chọn đáp án C
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
Chọn đáp án B
The reverse conversion of electrical energy into mechanical energy is done by an electric.........
transformer
gennerator
circuit breaker
motor
Chọn đáp án D
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.
Chọn đáp án D
............... is a structure used in electric power transmission and distribution to transmit electrical energy across large distances.
A generator
A reactor
A capacitor bank
Chọn đáp án A
Hydroelectric power plants used water flowing directly through the turbines to power the
Boiler
Generator
Reactor
Dam
Chọn đáp án B
The symbol of electric currentis
Z
V
I
P
Chọn đáp án C
The symbol of resistanceis
Z
L
R
X
Chọn đáp án C
Power grid includes particular installations, substations, lines or cables for transmitting and ...... of electricity.
generating
distribution
distributing
generation
Chọn đáp án B
What is the unit ofelectromotive force?( sức điện động)
Coulomb
Volt
Ohm
Ampere
Chọn đáp án B
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
Chọn đáp án B
Generation of ...... is a process whereby electrical energy is obtained from some other form of energy
heat
fuel
electricity
steam
Chọn đáp án C
Smaller distribution stations may use ............ or fuses for protection protection of distribution circuits
Isolators
arrestors
Disconnect switching devices
recloser circuit breakers
Chọn đáp án D
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
Chọn đáp án C
In ............, voltage is changed for transmission and distribution.
inductrial factories
commercial centers
power stations
substations
Chọn đáp án D
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
Chọn đáp án B
Substations may be owned and .... by an electrical utility.
operating
operation
operated
operators
Chọn đáp án C
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.
Chọn đáp án D
The unit of electric resistanceis
Siemens
Tesla
Ohm
Coulomb
Chọn đáp án C
A coil of inductance 150mH and zero resistance is connected across a 100V, 50Hz supply. The inductive reactanceof the coil is:
41,72Ω
47,12Ω
47,72Ω
42,17Ω
Chọn đáp án B
A conductor has a conductance of 0.1 S. It’s resistance is:
10 Ω
1Ω
0.1 Ω
1mΩ
Chọn đáp án A
Generation of electricity is a process whereby electrical energy is obtained from some other form of …...
oil
fuel
energy
water
Chọn đáp án C
Conventional generators produce electricity at a ............ that is a multiple of the rotation speed of the machine.
power
voltage
current
frequency
Chọn đáp án D
Câu14: An electric gridor power grid is an interconnected network for ……. electricityfrom producers to consumers.
generating (phát điện)
changing (biến đổi điện)
delivering(cung cấp điện)
consuming (tiêu thụ điện)
Chọn đáp án C
In the Internation System of Units, the unit of conductance(điện dẫn) is ........
Volt
Farad
Ohm
Siemens
Chọn đáp án D
