91. The heated parts of an electrical machine dissipate heat into their surroundings by which of the followingmodes of heat dissipation ?
92. The action of electromagnetic machines can be related to which of the following basic principles ?
93. Which of the following properties a damping oil must possess ?
94. In transformers using hot rolled steel, the cross-section of the yoke is made about _____ greater than that of the core
95. An induction meter can handle current up to
96. _______ is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?
97. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of
98. Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto
99. The household energy meter is
100. The flash point of transformer oil should be higher than
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