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The noise produced by a transformer is termed as_______________________?
Related MCQs
Which of the following parts of a transformer is visible from outside ?
Which of the following insulating materials can withstand the highest temperature safely ?
The efficiency of two identical transformers under load conditions can be determined by__________?
Which of the following acts as a protection against high voltage surges due to lightning and switching ?
A good voltage regulation of a transformer means__________?
Which of the following protection is normally not provided on small distribution transformers ?
For a transformer, operating at constant load current, maximum efficiency will occur at__________?
A Transformer transforms__________?
A transformer can have regulation closer to zero__________?
In a transformer the resistance between its primary and secondary should be__________?
The secondary of a current transformer is always short-circuited under operating conditions because it__________?
A shell-type transformer has_________?
N atural air coo ling is generally restricted for transformers up to__________?
The size of a transformer core will depend on__________?
The secondary winding of which of the following transformers is always kept closed?
The function of breather in a transformer is__________?
The efficiencies of transformers compared with that of electric motors of the same power are__________?
The transformer oil should have ___ volatility and _______ viscosity?
In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of__________?
For the parallel operation of single phase transformers it is necessary that they should have__________?
Minimum voltage regulation occurs when the power factor of the load is__________?
Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is__________?
Short circuit test on transformers is conducted to determine__________?
If a transformer is switched on to a voltage more than the rated voltage__________?
Open circuit test on transformers is conducted to determine__________?
Part of the transformer which is most subject to damage from overheating is__________?
During open circuit test of a transformer:
The voltage transformation ratio of a transformer is equal to the ratio of__________?
A no-load test is performed on a transformer to determine__________?
Which type of winding is used in 3 phase shell-type transformer?
An open-circuit test on a transformer is conducted primarily to measure__________?
The transformer lamination’s are insulated from each other by__________?
When secondary of a current transformer is open-circuited its iron core will be__________?
The efficiency of a transformer, under heavy loads, is comparatively low because__________?
The maximum load that a power transformer can carry is limited by its__________?
The hum in a transformer is mainly attributed to__________?
Which of the following is the most likely source of harmonics in a transformer ?
If a transformer is continuously operated the maximum temperature rise will occur in__________?
Iron loss of a transformer can be measured by__________?
Which of the following loss in a transformer is zero even at full load __________?
Negative voltage regulation is indicative that the load is__________?
Helical coils can be used on__________?
If the supply frequency to the transformer is increased,”the iron loss will__________?
Which of the following is not a routine test on transformers ?
A transformer can have zero voltage regulation at__________?
An ideal transformer will have maximum efficiency at a load such that?
Noise level test in a transformer is a__________?
In an actual transformer the iron loss remains practically constant from no load to full load because:__________?
The path of the magnetic flux in transformer should have__________?
When a given transformer is run at its rated voltage but reduced frequency, its__________?
Which of the following properties is not necessarily desirable for the material for transformer core ?
The noise produced by a transformer is termed as_______________________?
A. zoom
B. hum
C. ringing
D. buzz
Correct Answer:
hum
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Last Updated:
June 29, 2018