Electrical Engineering Mcqs — Test 86
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Question 1
On which of the following variables heat convected depends ?
Question 2
The mcrease in heat dissipation by air blasts is due to increase in______________?
Question 3
Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto_______________?
Question 4
Hydrogen has a heat transfer co-efficient __________ times that of air?
Question 5
With conventional hydrogen cooling it is possible to increase the rating of a single unit to___________?
Question 6
cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall______________?
Question 7
The thermal conductivity of hydrogen is _____________ times that of air?
Question 8
The noise produced by a ___________ cooled machine is less as the rotor moves in a medium of smaller density?
Question 9
The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ?
Question 10
Which of the following is an advantage of hydrogen cooling ?