A.Dry concrete
B.Dry concrete having 0.4% rein-forcement
C.Concrete having 10% moisture by volume
D.Concrete having 10% meisture by volume and 0.4% reinforcement
E.Concrete having 10% moisture by volume and 0.6% reinforcement
A.Water
B.Air
C.Cork
D.Wood
E.None of the above
A.absorptivity = 0
B.reflectivity = 0
C.absorptivity = reflectivity = 1
D.absorptivity + reflectivity = 1
A.If a physical body is impermeable to any kind of rays
B.If the parts of a body are not in motion relative to one another
C.If the bodies are kept in vacuum
D.If the bodies are immersed in water
E.If the temperature difference between the bodies does not exist
A.1
B.1.33
C.1.4
D.1.41
E.1.67
A.Prandtl number
B.Grashoff number
C.Stanton number
D.Weber number
A.Less than 1
B.1
C.5 to 1
D.10 to 5
E.More than 10
A.momentum transport by molecular friction
B.heat energy transport through conduction
C.heat evergy transport through convection
D.conversion of momentum into heat energy
A.Ice
B.Water
C.Lamp black
D.All of the above
E.None of the above
A.Long vertical tube evaporator
B.Short vertical tube evaporator
C.Agitated film evaporator
D.Zig-zag film evaporator
E.Falling film evaporator
