The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation ? A. minimum B. maximum C. nil D. none of the above View Answer B. maximum
The action of electromagnetic machines can be related to which of the following basic principles ? Machine Design MCQs
__________ has a low relative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable ? Machine Design MCQs
________ is universally used for windings of electrical machines because it is easily workable without any possibility of fracture ? Machine Design MCQs
In _________ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft ? Machine Design MCQs
Electrical machines having power outputs ranging from a few kW up to approximately 250 kW may be classified as ? Machine Design MCQs
The efficiency of a machine should be as ____________ as possible to reduce the operating cost ? Machine Design MCQs
In induction motors, the length of air gap in kept as small as mechanically possible is order to have ? Machine Design MCQs
Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer ? Machine Design MCQs
__________ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ? Machine Design MCQs
The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc ? Machine Design MCQs
Electrical machines having a power output up to about 750 W may be called __________ machines ? Machine Design MCQs
If an insulating material is operated beyond the maximum allowable temperature, its life is ? Machine Design MCQs
The design of mechanical parts is particularly important in case of __________ speed machines ? Machine Design MCQs
The length cf air gap to be provided in __________ is primarily determined by power factor consideration ? Machine Design MCQs
