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Heat and Mass Transfer

Heat and Mass Transfer
Temperature of steam at around 540°C can be measured by

Thermistor
Thermocouple
None of these
Thermometer

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Heat and Mass Transfer
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by

Conduction and convection
Convection
Radiation
Conduction

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Heat and Mass Transfer
A non-dimensional number generally associated with natural convection heat transfer is

Grashoff number
Prandtl number
Nusselt number
Weber number

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Heat and Mass Transfer
When α is absorptivity, ρ is reflectivity and τ is transmissivity, then for a diathermanous body,

α = 0, ρ = 0 and τ = 1
α = 1, ρ = 0 and τ = 0
α = 0, ρ = 1 and τ = 0
α + ρ = 1 and τ = 0

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Heat and Mass Transfer
The emissive power of a body depends upon its

Wave length
Physical nature
All of these
Temperature

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Heat and Mass Transfer
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is

Directly proportional to the difference of temperatures between the two bodies
Directly proportional to the surface area
Both (A) and (B)
Either (A) or (B)

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