Radiation Shielding MCQ Quiz in मल्याळम - Objective Question with Answer for Radiation Shielding - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക
Last updated on Apr 8, 2025
Latest Radiation Shielding MCQ Objective Questions
Top Radiation Shielding MCQ Objective Questions
Radiation Shielding Question 1:
Two infinitely large parallel plates (I and II) are held at temperatures TI and TII (TI > TII) respectively and placed at a distance 2d apart in a vacuum. An infinitely large flat radiation shield (III) is placed in parallel in between I and II. The emissivities of all the plates are equal. The ratio of the steady-state radiative heat fluxes with and without the shield is:
Answer (Detailed Solution Below)
Radiation Shielding Question 1 Detailed Solution
In case if there are n screens used, all of them are having the same emissivity as those of plate.
Here, n = 1
Radiation Shielding Question 2:
Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of this radiant heat transfer by inserting thin parallel shields of same emissivity on both sides. The number of shields should be
Answer (Detailed Solution Below)
Radiation Shielding Question 2 Detailed Solution
Let N be the required number of shields. When emissivities of the main radiating surface and those of parallel radiation shields are equal, then
Given,
Or N = 3