In a forward feed multiple effect evaporator unit
In a forward feed multiple effect evaporator unit
What is the unit of thermal conductivity ?
What is the unit of thermal conductivity ?
The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are
The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are
Which one gives the monochromatic emissive power for black body radiation?
Which one gives the monochromatic emissive power for black body radiation?
The Graetz number is concerned with the
The Graetz number is concerned with the
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred
Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.
Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.
In forced convection, the Nusselt number is a function of
In forced convection, the Nusselt number is a function of
Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second.
Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second.
LMTD can't be used as such without a correction factor for the
LMTD can't be used as such without a correction factor for the
Vibrations in the tubes of a shell and tube heat exchanger is induced due to the
Vibrations in the tubes of a shell and tube heat exchanger is induced due to the
If heat transfer rate varies with the time, it is termed as
If heat transfer rate varies with the time, it is termed as
Which of the following is generally considered as opaque surface towards radiations?
Which of the following is generally considered as opaque surface towards radiations?
Pick out the wrong statement:
Pick out the wrong statement:
Heat transfer by __________ may not necessarily require the presence of a medium.
Heat transfer by __________ may not necessarily require the presence of a medium.
Which of the following situations can be approximated to a steady state heat transfer system?
Which of the following situations can be approximated to a steady state heat transfer system?
Water always boils when its
Water always boils when its
Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.
Radiation heat losses from satisfactorily insulated high pressure boilar may be about __________ percent.
Economy of an evaporator is influenced by the
Economy of an evaporator is influenced by the
The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is
The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is
Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats
Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?
Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids?
Which is the most suitable for cold viscous feed?
Which is the most suitable for cold viscous feed?
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.
The advantage of backward feed multiple effect evaporators over forward feed units is that
The advantage of backward feed multiple effect evaporators over forward feed units is that
While the total emissivity of a perfect black body is unity, the same for a real body is
While the total emissivity of a perfect black body is unity, the same for a real body is
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is
Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)
Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)
Heat flux through several resistances in series in analogous to the current flowing through several
Heat flux through several resistances in series in analogous to the current flowing through several
