Multi Option Question Page 700

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You Are On Multi Choice Question Bank SET 700

35001. Reason for operating an evaporator in multiple effect is to secure

35002. In a cooling tower, water becomes cool by

35003. In Fourier's law, the proportionality constant is called the

35004. The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.

35005. From which country India borrowed the scheme of Indian Federation?

35006. 'Duhring's plot' is of use in

35007. Which has the lowest Prandtl number ?

35008. International Day of the Girl Child is on:

35009. Prandtl number for most of dry gases is about

35010. Prandtl number is the reciprocal of

35011. 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

35012. For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is

35013. Multiple effect evaporation accounts for

35014. In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is

35015. Maximum water velocity in tubes of a 1-2 shell and tube heat exchanger may be around __________ metres/second.

35016. In Biot number, the characteristic length used is the ratio of the __________ of the solid.

35017. Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

35018. Heat transfer co-efficient equation for forced convection, Nu = 0.023 Re0.8 . Prn, is not valid, if the value of

35019. Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

35020. In case of a multipass shell and tube heat exchanger, the temperature drop in the fluid

35021. The purpose of providing expansion bellows in the shell of tubular exchanger is to

35022. A graph between __________ is called Wilson plot.

35023. Grashhoff number is given by

35024. The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2.K. The overall heat transfer co-efficient at this time is

35025. In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m2.s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m2/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is

35026. Whose autobiography is’Ente Nadukadathal’?

35027. What is the geometric mean of two heat transfer areas A1 and A2 ?

35028. Evaporation by thermocompression results in the

35029. Forced circulation evaporators are normally used for concentrating liquids having

35030. Steam economy in case of a triple effect evaporator will be

35031. Crystal size in a continuous crystalliser depends upon the

35032. Heat waves

35033. Air is best heated with steam in a heat exchanger of

35034. Which of the following is generally considered as opaque surface towards radiations?

35035. Black liquor generated during paper manufacture is concentrated in a

35036. Total reflux in a distillation operation requires minimum

35037. The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by

35038. The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is

35039. Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

35040. When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

35041. Name the scheme launched by the Government of India for online booking of LPG cylinders.

35042. __________ columns are used for liquid dispersion in a continuous gas phase.

35043. Overall efficiency of the distillation column is

35044. On addition of solute in the solvent, the __________ of the solution decreases.

35045. Which is the controlling factor for a drum drier?

35046. Drying operation under vacuum is carried out to

35047. Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

35048. Separation of two or more components of a liquid solution can not be achieved by

35049. Stefan's law describes the mass transfer by

35050. At minimum reflux ratio for a given separation

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35001. Reason for operating an evaporator in multiple effect is to secure (adsbygoogle = window.adsbygoogle || []).push({});