Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto

Related MCQs

• Transformers with a capacity of upto _____ have a cooling radiator system with natural cooling
• With conventional hydrogen cooling it is possible to increase the rating of a single unit to
• cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall
• In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill.
• Machines cooled by direct cooling method may be called
• Electrical machines having a power output upto about 750 W may be called_______machines.
• Electrical machines having power outputs ranging from a few kW upto approximately 250 kW may be classified as
• In D.C. machines, the ____ in field mmf results in increase in size and cost of machines.
• Which ofthe following methods is used for air cooling of turbo-alternators ?
• D.C. machines designed with a large value of air gap length have