A. Total condenser
B. Vacuum evaporator
C. Partial condenser
D. Double pipe heat exchanger
Correct Answer: Partial condenser ✔
Last Updated: March 03, 2019
Related MCQs
- Film boiling is usually not desired in commercial equipments, because__________?
- The advantage of backward feed multiple effect evaporators over forward feed units is that__________?
- In case of a multipass shell and tube heat exchanger, providing a baffle on the shell side __________ the heat transfer rate?
- With the increase of temperature, the Col-burn jH factor__________?
- Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second?
- In a heat exchanger, floating head is provided to__________?
- Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?
- The equivalent diameter for pressure drop is __________ that for heat transfer?
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- Fouling factor__________?
- If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid__________?
- The unit of heat transfer co-efficient in SI unit is__________?
- Which type of heat exchanger is preferred for heavy heat loads ?
- With increase in porosity, the thermal conductivity of a solid substance__________?
- Vacuum is generally maintained in the vapour space of an evaporator mainly to__________?
- The number of kg vaporised per kg of steam fed to the evaporator is defined as__________?
- Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone?
- Which of the following is unimportant in forced convection ?
- Steam consumption in kg/hr in case of an evaporator is given by (where, C & E are capacity the economy of the evaporator respectively) ?
- Dittus-Boelter equation cannot be used for molten metals mainly due to its very low__________?
- The heat flux (from outside to inside) across an insulating wall with thermal conductivity, K = 0.04 W/m.°K and thickness 0.16m is 10 W/m2. The temperature of the inside wall is – 5°C. The outside wall temperature is__________?
- In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head?
- Heat produced when a steady state current, I passes through an electrical conductor having resistance, ‘R’ is__________?
- The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by__________?
- Fourier’s law applies to the heat transfer by__________?
- As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the__________?
- When vaporisation takes place directly at the heating surface, it is called__________?
- Thermal conductivity of a conducting solid material depends upon its__________?
- Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the__________?
- The actual temperature drop across the heating surface in an evaporator depends on the__________?
- Heat flux is the time rate of heat transfer per unit__________?
- The steam ejector is used to__________?
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- Fourier’s law of heat conduction applies to __________ surfaces?
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- Harmonic mean temperature difference is given by__________?
- If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length__________?
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- Heat transfer occurs by natural convection because change in temperature causes difference in__________?
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- Which is the most suitable for the concentration of foamy & frothy liquors ?
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