PPSCFPSCNTSPakistan govt jobs
- Subject
- Heat Transfermechanical-engineering-mcqs › heat-transfer
- Published
- 24 Jan 2019
- Last updated
- 28 May 2026
Explanation
In free convection, the Nusselt number is primarily influenced by the Grashof and Prandtl numbers, as these represent the buoyancy-driven flow and fluid properties, respectively. Reynolds number is more relevant in forced convection scenarios.
More Heat Transfer MCQs
Practice related questions from the same subject.
- 1.According to Wien's displacement law, the wavelength at which a blackbody emits maximum radiation is directly related to which of the following?
- 2.Under what condition, based on radiative characteristics, is a material considered opaque?
- 3.Under which condition based on radiative characteristics does an object appear white?
- 4.Which principle states that the ratio of a body's emissive power to its absorptive power is constant for all materials and equals the emissive power of an ideal black body?
- 5.How do the thermal diffusivities of solids typically compare to those of liquids and gases?
- 6.According to Stefan's law, the total energy radiated per second per unit area by a black body is directly proportional to which of the following?
- 7.Under which conditions related to radiative properties is a body considered black?
- 8.The total emissive power refers to the total radiation energy emitted by a black body per unit of what?
More in Mechanical Engineering Mcqs
- Compressors, Gas Turbines and Jet Engines
- Engineering Materials
- Engineering Mechanics
- Fluid Mechanics
- Hydraulic Machines
- I.C. Engines
- Machine Design
- Nuclear Power Plants
- Production Technology
- Refrigeration and Air Conditioning
- Steam Boilers, Engines, Nozzles and Turbines
- Strength of Materials
- Theory of Machines
- Thermodynamics
- Workshop Technology