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The noise resulting from vibrations of laminations set by magnetic forces, is termed as_________________?
Related MCQs
Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
The transformer ratings are usually expressed in terms of__________?
An ideal transformer has infinite values of primary and secondary inductances. The statement is__________?
The chemical used in breather is__________?
The chemical used in breather for transformer should have the quality of__________?
The use of higher flux density in the transformer design__________?
In a transformer the tappings are generally provided on__________?
What will happen if the transformers working in parallel are not connected with regard to polarity ?
If the percentage impedances of the two transformers working in parallel are different, then__________?
If R2 is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be__________?
Two transformers operating in parallel will share the load depending upon their__________?
The power transformer is a constant__________?
The purpose of providing iron core in a step-up transformer is?
Greater the secondary leakage flux__________?
Spacers are provided between adjacent coils?
No-load current of a transformer has__________?
Transformer breaths in when__________?
The maximum efficiency of a distribution transformer is__________?
Power transformers are designed to have maximum efficiency at__________?
Natural oil cooling is used for transformers up to a rating of__________?
In the transformer the function of a conservator is to__________?
In a transformer routine efficiency depends upon__________?
The no load current in a transformer lags behind the applied voltage by an angle of about__________?
A common method of cooling a power transformer is__________?
In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are__________?
Efficiency of a power transformer is of the order of__________?
Which winding in a transformer has more number of turns ?
Primary winding of a transformer__________?
A transformer cannot raise or lower the voltage of a D.C. supply because__________?
A transformer transforms__________?
In the transformer following winding has got more cross-sectional area__________?
While conducting short-circuit test on a transformer the following side is short circuited?
Which of the following is not a part of transformer installation ?
The purpose of providing an iron core in a transformer is to__________?
No-load current in a transformer__________?
The efficiency of a transformer will be maximum when__________?
The permissible flux density in case of cold rolled grain oriented steel is around__________?
Sumpner’s test is conducted on transformers to determine__________?
The dielectric strength of transformer oil is expected to be__________?
No-load on a transformer is carried out to determine__________?
The path of a magnetic flux in a transformer should have__________?
The no-load current drawn by transformer is usually what per cent of the full-load current ?
The degree of mechanical vibrations produced by the laminations of a transformer depends on__________?
A transformer core is laminated to__________?
In a transformer the energy is conveyed from primary to secondary_________?
Which of the following does not change in a transformer ?
The noise resulting from vibrations of laminations set by magnetic forces, is termed as_________________?
A. magnetostrication
B. boo
C. hum
D. zoom
Correct Answer:
hum
✔
Last Updated:
June 28, 2018