Articles Posted in the " Radiation " Category

  • MCQ ON RADIATION EXCHANGE BETWEEN SURFACES

    MCQ ON RADIATION EXCHANGE BETWEEN SURFACES

      MCQ ON RADIATION EXCHANGE BETWEEN SURFACES Shape factor F12 between two bodies depends on the (a) Shape and size of the two bodies (b) Shape and size of the bigger body (c) Shape, size and orientation of the bigger body (d) None ANS:(d) Shape factor F12 between two bodies depends on the (a) Shape […]


  • MCQ ON RADIATION HEAT TRANSFER

    MCQ ON RADIATION HEAT TRANSFER

    MCQ ON RADIATION HEAT TRANSFER   Plank’s law gives the radiation flux for a (a) A single wavelength (b)  Two wavelengths  ( c) Three wavelengths (d) None ANS: (a) Plank’s law gives the radiation flux for a (a) A Black body (b)  A Grey body  ( c) All types of bodies (d) None ANS: (a) Stefan’s Boltzmann […]


  • HEAT TRANSFER MCQ-RADIATION, CONVECTION, BOILING—

    HEAT TRANSFER MCQ-RADIATION, CONVECTION, BOILING—

    HEAT TRANSFER MCQ-RADIATION, CONVECTION, BOILING— Law for the monochromatic radiation emissive power is (a) Stephen’s Boltzmann Law (b) Planck’s Law (c) Wien’s displacement Law (d)None ANS: (b) Radiosity is defined as (a) Total reflected radiations (b) Total emitted radiations (c) Difference of emitted and reflected radiations (d) None ANS: (b) Absorbtivity is zero for an opaque […]


  • HEAT TRANSFER—M C Q on Radiation, Convection and Boiling

    HEAT TRANSFER—M C Q on Radiation, Convection and Boiling

    HEAT TRANSFER—M C Q on Radiation, Convection and Boiling Which Law gives the monochromatic emissive power? (a) Stefan’s Boltzmann Law (b) Kirchoff’s Law (c) Wien’s Displacement Law (d) None ANS: (d) All types of radiations are emitted from a body at (a) Room temperature (b) Boiling temperature of water (c) Melting temperature of steel (d) None ANS: (d) Radiations are more harmful with […]


  • HEAT TRANSFER-MECHANICAL ENGINEERING- QUESTION BANK ON PTU PATTERN — RADIATION

    HEAT TRANSFER-MECHANICAL ENGINEERING- QUESTION BANK ON PTU PATTERN — RADIATION

    HEAT TRANSFER–MECHANICAL ENGINEERING- QUESTION BANK ON PTU PATTERN — RADIATION RADIATION 1 MARK OBJECTIVE QUESTIONS According to Kirchoff’s law, Radiated heat is proportional to the fourth power of absolute temperature Emissivity is equal t absorbtivity Emissive power depends on absolute temperature None Ans: (b) All the radiations from a black body are Reflected Transmitted Partly […]