The time taken by the machine to attain 0.632 of its final steady temp – McqOptions

MCQOPTIONS

1.	The time taken by the machine to attain 0.632 of its final steady temperature rise iscalled
A.	heating time constant
B.	cooling time constant
C.	either (a) or (b)
D.	none of the above
Answer» B. cooling time constant

Discussion

No Comment Found

Related MCQs

By which of the following methods the temperature rise of windings and other partsmay be determined ?
______is extensively used for those portions of magnetic circuit which carry steady fluxand need superior mechanical properties ?
The thermal conductivity of hydrogen is ______ times that of air
Electrical machines having power outputs ranging from a few kW upto approximately250 kW may be classified as
________ has a lowrelative permeability and is used principally in field frames when costis of primary importance and extra weight is not objectionable.
Which of the following methods does not take into account the maximum temperaturerise under variable load conditions ?
In induction motors, the length of air gap in kept as small as mechanically possible isorder to have
The efficiency of a machine should be as ______ as possible to reduce the operatingcost.
The heat dissipating capability of transformers of ratings higher than 30 kVA inincreased by providing which of the following ?
Which of the following methods may be adopted to reduce the effects of armaturereaction ?