Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
A. Grashoff number
B. Grashoff number & Reynolds number
C. Reynolds number
D. Grashoff number & Prandtl number
Answer: Option D
A. Grashoff number
B. Grashoff number & Reynolds number
C. Reynolds number
D. Grashoff number & Prandtl number
Answer: Option D
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
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