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ВходЗачетный тест для гр.Техническая эксплуатация и обслуживание электромеханического оборудования
Список вопросов теста
Вопрос 1
The phenomenon due to which there is an induced current in one coil due to the current in a neighbouring coil is?
Варианты ответов
- Mutual inductance
- Steady current
- Electromagnetism
- Susceptance
Вопрос 2
If the current in one coil becomes steady, the current in neighbouring coil is?
Варианты ответов
- Halves
- Zero
- Doubles
- Infinity
Вопрос 3
Practical application of mutual inductance is ____________
Варианты ответов
- Transformer
- Capacitor
- AC generator
- DC generator
Вопрос 4
The capacitor doesn’t allow sudden changes in ___________
Варианты ответов
- Current
- Resistance
- Capacitance
- Voltage
Вопрос 5
Electricity may be generated by a wire:
Варианты ответов
- carrying current
- wrapped as a coil
- that has neutral domains
- passing through a flux field
Вопрос 6
The co-efficient of coupling between two air core coils depends on
Варианты ответов
- mutual inductance and self inductance of two coils
- self-inductance of two coils only
- mutual inductance between two coils only
- none of the mentioned
Вопрос 7
Which of the following circuit elements will oppose the change in circuit current ?
Варианты ответов
- Inductance
- Resistance
- Capacitance
- All of the above
Вопрос 8
Mutually inductance between two magnetically-coupled coils depends on
Варианты ответов
- cross-sectional area of their common core
- the number of their turns
- permeability of the core
- all of the above
Вопрос 9
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
Варианты ответов
- remain the same
- increase
- decrease
- initially increase and then decrease
Вопрос 10
Higher the self-inductance of a coil,.....
Варианты ответов
- longer the delay in establishing steady current through it
- greater the flux produced by it
- lower the e.m.f. induced
- lesser its weber-turns
Вопрос 11
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as....
Варианты ответов
- self-inductance
- mutual inductance
- series aiding inductance
- capacitance
Вопрос 12
What is the best way to verify the connection of three single-phase transformers?
Варианты ответов
- With a voltmeter
- With a megger
- With ammeter
Вопрос 13
Two transformers are connected in parallel, one has twice the internal impedance of the other,
Варианты ответов
- The higher-impedance transformer will carry Jess than half the load of the lower-impedance transformer.
- The lower impedance transformer will carry more than twice as much load as the higher impedance transformer
- The lower impedance transformer will overload.
Вопрос 14
D.c. is a current that.....
Варианты ответов
- flows in one direction.
- changes its direction of flow.
Вопрос 15
A.c. flows provided.....
Варианты ответов
- a direct voltage source is applied.
- an alternating voltage source is applied.
Вопрос 16
In an alternating current circuit....
Варианты ответов
- current flows in one direction 60 times per second.
- current flows in one direction 60 times and in the other direction 60 times per second.
Вопрос 17
A.c....
Варианты ответов
- can be changed into d.c.
- cannot be changed into d.c.
Вопрос 18
Переведите слова "loose"......
Варианты ответов
- свободный,
- прибор
- нежесткий
- самоиндукция
- переносить
Вопрос 19
Переведите слово "to couple" -
Варианты ответов
- поле
- сцеплять
- отделять
- соединять
- переносить
Вопрос 20
Допишите: A high-pass filter is used ....
Вопрос 21
Допишите: A low-pass filter is used ....
Вопрос 22
Соотнести слова с переводом:
1.
Wire
2.
Unit of measure
3.
Matter
Варианты ответов
- Провод
- Единица измерения
- Вещество, материя
Вопрос 23
Закончите предложения:
An alternating current changes its direction of flow …, ...
Вопрос 24
Закончите предложения:
A direct current flows provided a direct voltage source is applied..., ... .
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