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With direct water cooling it is possible to have ratings of about_____________?
Related MCQs
In self cooled motors the cooling time constant is about __________ than the heating time constant because cooling conditions are worse at standstill?
Direct water cooling of rotor winding presents__________?
In direct cooled system using hydrogen both stator and rotor conductors are made__________?
The resistivity of water should not be less than__________?
Machines cooled by direct cooling method may be called__________?
The density of hydrogen is __________ times the density of air?
Which of the following is an advantage of hydrogen cooling ?
The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ?
The noise produced by a __________ cooled machine is less as the rotor moves in a medium of smaller density?
The thermal conductivity of hydrogen is __________ times that of air?
cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall__________?
With conventional hydrogen cooling it is possible to increase the rating of a single unit to__________?
Hydrogen has a heat transfer co-efficient __________ times that of air?
Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto__________?
The mcrease in heat dissipation by air blasts is due to increase in__________?
On which of the following variables heat convected depends ?
Which of the following materials is used in the manufacture of resistance grids to be used in the starters of large motors ?
The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc?
__________is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer?
Hot rolled sheets have __________ value of permeability?
Materials exhibiting zero value of resistivity are known as __________ ?
__________is universally used for windings of electrical machines because it is easily workable without any possibility of fracture?
__________ has a low relative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable?
Commercial available medium size machines have a speed range of __________ ?
The change in flux linkages can be caused in which of the following ways ?
The action of electromagnetic machines can be related to which of the following basic principles __________?
The length cf air gap to be provided in __________ is primarily determined by power factor consideration?
The design of mechanical parts is particularly important in case of __________ speed machines?
impose limitation on design__________?
If an insulating material is operated beyond the maximum allowable temperature, its life is__________?
Electrical machines having a power output up to about 750 W may be called__________machines?
In induction motors, the length of air gap in kept as small as mechanically possible is order to have__________?
Which of the following is the major consideration to evolve a good design ?
The efficiency of a machine should be as __________ as possible to reduce the operating cost?
Electrical machines having power outputs ranging from a few kW up to approximately 250 kW may be classified as__________?
In _________ machines, the size of the shaft is decided by the critical speed which depends on the deflection of the shaft?
With direct water cooling it is possible to have ratings of about_____________?
A. 200 MW
B. 300 MW
C. 400 MW
D. 600 MW
Correct Answer:
600 MW
✔
Last Updated:
December 22, 2018