The highest value of thermal conductivity is expected for
A.Solid ice
B.Melting ice
C.Water
D.Boiling water
E.Steam
Category: Heat Transfer Mcqs
A radiation shield should have
A.low reflectivity
B.high reflectivity
C.high emissivity
D.None of the above
Oxygen boils at -183?C, this temperature is
A.? 215?F
B.? 227?F
C.? 329?F
D.? 361?F
E.? 398?F
Dropwise condensation occurs on a
A.Glazed surface
B.Smooth surface
C.Oily surface
D.Coated surface
E.None of the above
Metals are good conductors of heat because
A.They contain free electrons
B.Their atoms are relatively far apart
C.Their atoms collide frequently
D.They have reflecting surfaces
E.None of the above
Which one of the following will have least value of thermal conductivity?
A.Copper
B.Silver
C.Glass
D.Water
E.Air
Diffusion coefficient of water into air at 26?C is nearly
A.0.026 cm2/s
B.0.26 cm2/s
C.2.6 cm2/s
D.5.2 cm2/s
E.2.6 cm2/sec
?40?C is equivalent to
A.172?R
B.273?K
C.500?R
D.? 40?K
E.? 40?F
Radio active nuclear waste is treated in
A.Pulsed column extractor
B.Mixer settler extractor
C.Sieve plate extraction column
D.Bollman extractor
E.None of the above
Transmission of heat by molecular collision is
A.Conduction
B.Convection
C.Radiation
D.Scattering
E.Transmission
