A. Inversely with thermal conductivity
B. Directly with heat transfer co-efficient
C. Directly with thermal conductivity
D. Inversely with the dimension of the solid
Related Mcqs:
- Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________?
A. Gr0.25, Gr
B. Gr0.25, Gr0.33
C. Gr, Gr0.25
D. Gr0.33, Gr0.25 - Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as______________________?
A. Re0.5, Re0.8
B. Re0.8, Re-0.5
C. Re0.8, Re0.5
D. Re-0.8, Re0.5 - Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal_________________?
A. Tensile strength
B. Compressive strength
C. Young’s modulus
D. Thermal co-efficient of expansion - Electrometallurgical methods of metal extraction is normally used for those metals___________________?
A. Whose oxide/ore is not reduced by carbon
B. Which fall in the category of alkali & alkaline earth metals
C. Which stands higher in the electrochemical series of the metal
D. All A, B. & C. - Pick out the correct statement ?
A. Jet engine can work, where there is no atmosphere
B. Rocket engines cannot work, where there is no atmosphere
C. Rocket engines carry oxygen required for the combustion in the form of oxidiser
D. Jet engines also carry oxidiser - For grinding of softer materials, the grinding wheel should have _________________ grain size ?
A. Finer
B. Coarser
C. Medium
D. Any type of - High endurance limit of carburised machine parts is because of the fact that carburisation __________________?
A. Suppresses any stress concentration produced in the parts
B. Enhances the yield point of the material
C. Introduces a compressive layer on the surface
D. Produces a better surface finish - Triple point of water is__________________?
A. 0.01 °C
B. 492°R
C. 0°K
D. -273°C - Electrometallurgy is not involved in the extraction of ___________________ from its ore?
A. Aluminium
B. Tin
C. Lead
D. Both B. & C. - One of the methods of purification of leach liquor is ion exchange, which involves_________________?
A. Exchange between two liquid phases
B. Exchange between a gaseous phase and a liquid phase
C. Exchange between a liquid phase and an organic resin phase
D. Exchange between a solid phase and a gas phase
