Description : Surface renewal model of mass transfer was enunciated by (A) Toor and Marcello (B) Fick (C) Danckwerts (D) Stefan
Last Answer : (C) Danckwerts
Description : Penetration model (theory) for mass transfer was enunciated by (A) Danckwerts (B) Toor and Marcello (C) Higbie (D) Kissinevskii
Last Answer : (C) Higbie
Description : Mass transfer co-efficient is directly proportional to DAB 0.5 , according to __________ theory. (A) Penetration (B) Surface renewal (C) Film (D) None of these
Last Answer : (A) Penetration
Description : Mass transfer co-efficient is directly proportional to DAB according to the __________ theory. (A) Film (B) Penetration (C) Surface-renewal (D) None of these
Last Answer : (A) Film
Description : Calculation of mass transfer co-efficient is mostly/normally done using __________ theory. (A) Surface renewal (B) Film (C) Penetration (D) None of these
Last Answer : (B) Film
Description : _________ developed the film theory. (A) Higbie (B) Fick (C) Ergun (D) Levenspiel
Last Answer : (A) Higbie
Description : __________ equation applies to diffusivities in liquids. (A) Gilliland (B) Hirschfelder (C) Wilke and Chang (D) None of these
Last Answer : (A) Gilliland
Description : Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) (A) t 4 (B) T 4 (C) 1/t 4 (D) 1/T 4
Last Answer : (B) T
Description : In Fourier's law, the proportionality constant is called the (A) Heat transfer co-efficient (B) Thermal diffusivity (C) Thermal conductivity (D) Stefan-Boltzmann constant
Last Answer : (C) Thermal conductivity
Description : Mass transfer co-efficient 'K' according to penetration theory varies with mass diffusivity as (A) D0.5 (B) D (C) 1/D (D) D1.5
Last Answer : (A) D0.5
Description : Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as (A) K ∝D (B) K ∝√D (C) K ∝D1.5 (D) K ∝D
Last Answer : (B) K ∝√D
Description : Pick out the wrong statement. (A) In a first order reaction, A → products; the reaction becomes slower as it proceeds, because the concentration of A decreases and the rate is proportional to the concentration ... irreversible reaction, A + B → 2C is k.CA .CB , then the reaction is always elementary
Last Answer : (C) According to the penetration theory, the mass transfer co-efficient decreases, if the exposure time of an eddy to the solute decreases
Description : Ten percent law of energy transfer in a food chain was enunciated by
Last Answer : Ten percent law of energy transfer in a food chain was enunciated by A. Elton B. Lindeman C. Haeckel D. Schimper
Description : Dragon Quest VIII: What do you think happened to Marcello?
Last Answer : I think he heals up, regroups his thoughts, comes up with another devious plan and stronger than ever.
Description : If you wanted to be part ofan onlinecommunity that creates an educational web site that allows its members to add toor change its information, what type of web site would youneed? A) Educational or .edu B) Social networkingsite C) Wiki D) Web 2.0
Last Answer : Wiki
Description : Danckwerts developed the __________ theory. (A) Penetration (B) Surface renewal (C) Film (D) None of these
Last Answer : (B) Surface renewal
Description : Which of the following statements about continuous cardiac output monitoring are true? A. Continuous cardiac output monitoring may unmask events not detected by intermittent cardiac output measurements. ... stroke volume by detecting changes in resistance to a small, applied alternating current.
Last Answer : Answer: AD DISCUSSION: Various techniques are available to measure cardiac output continuously. The advantages of continuous cardiac output monitoring, as compared with intermittent methods, are (1) ... function of the stroke volume, which then can be used to calculate the cardiac output
Description : Which of the following law deals with hydraulic gradient in soil a. Fick law b. Stoke law c. Darcy law d. Liebig law
Last Answer : c. Darcy law
Description : The statement that "maximum wavelength of radiation is inversely proportional to the temperature" is __________ law. (A) Stefan-Boltzmann’s (B) Planck's (C) Wien's displacement (D) None of these
Last Answer : (C) Wien's displacement
Description : The value of Stefan-Boltzmann constant in SI unit is (A) 5.6697 × 10 -8W/m2 .°K4 (B) 0.1714 × 10 -8W/m2 .°K4 (C) 5.6697 × 10 -8kcal/m2 . °K4 (D) 0.1714 × 10 -8kcal/m2 . °K4
Last Answer : (A) 5.6697 × 10 -8W/m2 .°K4
Description : The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2 . The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10 -8 W/m2 .K4 ) (A) 1000 (B) 727 (C) 800 (D) 1200
Last Answer : (A) 1000
Description : Pick out the wrong statement: (A) With change in temperature, the radiant energy emitted by a black body remains unchanged (B) Absorptivity of a body approaches unity in case of diffuse reflection (C) Absorptivity of ... unity (D) Value of Stefan-Boltzmann constant is 4.876 10 -8 KCal/m2 .hr.°K4
Last Answer : (A) With change in temperature, the radiant energy emitted by a black body remains unchanged
Description : The Stefan-Boltzmann constant depends on the (A) Medium (B) Temperature (C) Surface (D) None of these
Last Answer : (D) None of these
Description : Stefan-Boltzmann law applies to __________ body. (A) Black (B) White (C) Grey (D) Any colour
Last Answer : (A) Black
Description : Which one gives the monochromatic emissive power for black body radiation? (A) Planck's law (B) Kirchhoff’s law (C) Wien's law (D) Stefan-Boltzmann law
Last Answer : (A) Planck's law
Description : The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium". This is __________ law. (A) Kirchoff’s (B) Planck's (C) Wien's displacement (D) Stefan-Boltzmann
Last Answer : (A) Kirchoff’s
Description : During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the (A) Gas film (B) Liquid film (C) Liquid-gas interface
Last Answer : (B) Liquid film
Description : Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as (A) K ∝ D (B) K ∝√D (C) K ∝ D1.5 (D) K ∝ D
Last Answer : (A) K ∝ D
Description : The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by (A) Increasing the gas film co-efficient (B) Increasing the liquid film co-efficient (C) Increasing the total pressure (D) Decreasing the total pressure
Last Answer : (A) Increasing the gas film co-efficient
Description : According to the film theory of mass transfer, the mass transfer coefficient is proportional to (where, D = molecular diffusivity). (A) D (B) D2 (C) D0.5 (D) 1/D
Last Answer : (A) D
Description : Pick out the wrong statement. (A) The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one (B) Sherwood number for flow in pipes can be expressed ... flux of a component A in binary mixture of A and B is given by - Dab'.dCA/dz
Last Answer : (C) According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by DAB(B)P - 3, Q - 2
Description : Pick out the wrong statement. (A) Mechanical agitation is required, if the system has low interfacial tension (B) Sieve tray towers are generally used for systems having low ... Prandtl analogy for heat and mass transfer considers the transfer through both laminar and turbulent layers
Last Answer : (A) Mechanical agitation is required, if the system has low interfacial tension
Description : The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc ) for the same system is. (A) 100 (B) 10 (C) 5 (D) 1
Last Answer : (B) 10
Description : A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A ... (D) Effectiveness factor for a zero order reaction cannot be 7/8 as it must always be 1
Last Answer : (A) Inner catalyst core of radius R/8 does not participate in reaction (
Description : Pick out the correct statement about the condensation. (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation (B) Suitable coating or vapour additive is used to promote film ... place on it (D) Reynolds number of condensing liquid is based on its mass flow rate
Last Answer : (B) Suitable coating or vapour additive is used to promote film wise condensation
Description : Pick out the wrong statement. (A) Atoms with same number of nucleons but different number of protons are called isobars (B) Atoms with same number of protons but different number of nucleons are ... product formed by emission of α-particle has mass number less by 4 units than the parent nuclide
Last Answer : (B) Atoms with same number of protons but different number of nucleons are called isoters
Description : Shortening of top link of tractor three-point hitch system a) Increases weight transfer on rear wheels b) Decreases weight transfer on rear wheels c) Increases penetration of implement d) Decreases penetration of implement Ans. d
Last Answer : Ans. d
Description : By whom was the quantum theory first enunciated? -Do You Know?
Last Answer : answer:
Description : By whom was the principle of ‘Black hole’ enunciated? -Do You Know?
Description : By whom was the law of constant proportions enunciated? -Do You Know?
Description : Gregor Mendel is often referred to as the Father of Genetics since he first enunciated the Principles of Heredity. His experimental material was (a) fruit fly (b) bread mould (c) pea plant (d) rhesus monkey
Last Answer : Ans:(c)
Description : Who enunciated the laws of planetary motion? (1) Nicolaus Copernicus (2) Johannes Kepler (3) Isaac Newton (4) Galileo
Last Answer : (2) Johannes Kepler Explanation: Kepler's laws of planetary motion are three scientific laws describing orbital motion, each giving a description of the motion of planets around the Sun. The laws are: the ... of a planet is directly proportional to the cube of the semi-major axis of its orbit.
Description : By whom was the principle of ‘Black hole’ enunciated?
Last Answer : S. Chandrashekhar
Description : By whom was the quantum theory first enunciated?
Last Answer : By Max Planck
Description : By whom was the law of constant proportions enunciated?
Last Answer : Proust
Description : Unit Hydrograph theory was enunciated by (A) Merril Bernard (B) W.W. Horner (C) Le-Roy K. Shermen (D) Robert E. Horten
Last Answer : Answer: Option C
Description : The principles of antihypertensive drug usage enunciated in JNC VI and WHO-ISH guidelines include the following except: A. Therapy for grade I and II hypertension should be initiated with a single drug ... initially fails to lower BP, it should be replaced by a drug/combination from another class
Last Answer : C. All subjects with BP higher than 140/90 mmHg should be put on antihypertensive medication immediately
Description : 1. Who was the author of the famous work All Contributions to the Critic of Political Economy' ? 2. Nobel Prize winning scientist James D. Watson is known for his work in which area? 3. ... -around an axis pointing towards which side? 20. Which Sultan built the fifth storeys of Qutub Minar?
Last Answer : Answer : 1. Karl Marx 2. Genetics3. Proust 4. Tamil Nadu 5. Atharvaveda 6. Carbon monoxide 7. Lok Sabha 8. Creditors 9. Sindri 10. Nandas 11. Compiler 12. 819°C 13. DNA 14. July 4th 15. Amil 16. Judge of Supreme Court 17. Rome 18. Recession plus inflation 19. The pole star 20. Firoz Shah Tughlaq
Last Answer : Johannes Kepler
Description : Where can i find and english copy of Stefan Zweig's "World of Yesterday"?
Last Answer : Try http://www.bookfinder.com/