(e) (b) and (c) above. Ans: d, 35. (b) emissive power Ans: b, 2. (d) all of the above

They are mostly used in gas-to-gas and gas-to-liquid heat 9. (a) more than those for liquids The quantity of heat needed to change the temperature of n …

(d) refrigerator condenser coils Ans: d, 97. (d) radiation (a) radiant heat is proportional to fourth power of absolute temperature (a) 3 (e) partly reflected and partly absorbed. (a) absolute temperature (T) 11.

(a) 0.45 (c) radiation

(e) none of the above. 1. (d) all of the above

(b) density (d) a vapour seal Ans: c, 8. Ans: b, 59. (b) 6 (c) different atomic structure

This aims to answer some of the more common questions raised by the sometimes obscure heat exchanger terminology. (e) air. (d) a physical property of the material The value of the wavelength for maximum emissive power is given by — Ans: c, 99. Combining each of these resistances in series gives: 1 UA = 1 (ηohA)i 1 Skw 1 (ηohA)o (5.7) where η0 is the surface efficiency of inner and outer surfaces, h is the heat transfer coefficients for the … (d) convert water into steam and superheat it (b) T2 (e) for a polished body. (c) 0.7 (d) X = 0, a + p = 1 (c) same Ans: c, 77. 0 with reviews - Be the first. (d) all of the above Emissivity of a white polished body in comparison to a black body is

(e) fully opaque. WorldCat is the world's largest library catalog, helping you find library materials online.

This preview shows page 1 - 3 out of 9 pages. (d) Grashoff no., Prandtl no. (e) Kirchhoff’s law. (e) all of the above. Ans: d, 13. This statement is known as (e) none of the above. (a) less than those for gases (d) inversely proportional to the thickness of the body (c) more than those for solids (b) hot medium inlet and outlet

Ans: c, 80. Create lists, bibliographies and reviews: Your request to send this item has been completed.

You may have already requested this item. (b) Nusselt number (c) 9 (c) Stefan’s law (c) kcal/m2 hr The insulation ability of an insulator with the presence of moisture would In order to read or download heat exchanger question answer ebook, you need to create a FREE account. (c) radiation and Reynold no. (c) transmitted Please choose whether or not you want other users to be able to see on your profile that this library is a favorite of yours. Ans: d, 19. (e) Reynold number. The unit of Stefan Boltzmann constant is Ans: b, 89. 3. Ans: b, 73.

(a) conduction All radiations in a black body are (a) varies with temperature Ans: c, 83. If index of compression for first stage of compression is higher than second stage, then for perfect inter-cooling and minimum total work, the first stage shares work than second. [(r2-r1) / Log (r2/r1)] (b) convection Ans: a, 74. (c) cooling of parts in furnace 10. Answers: 1. increases 2. Ans: d, 95. (c) less thermal conductivity insulator

DHANALAKSHMI COLLEGE OF ENGINEERING. (c) temperature gradient Ans: b, 79. The compression law (pv)1.4 = constant on temperature – entropy diagram is represented by _____line. Ans: b, 4. Working with heat exchangers : questions and answers.\" ; Export to EndNote / Reference Manager(non-Latin), http:\/\/www.worldcat.org\/oclc\/839739530>.

(d) 1.7

Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. (b) lower (b) wave length eBook includes PDF, ePub and Kindle version. (a) 0.002 (d) Planck’s constant (d) both convection and conduction

(b) p=l,T = 0anda = 0 A non-dimensional number generally associated with natural convection heat transfer is (d) may increase or decrease depending on temperature Which of the following has least value of conductivity

(b) change liquid into vapour

(e) none of the above. Heat exchanger are found in refrigerators, water boilers and a wide range of appliances. (a) increases 1. (a) p = 0, x = 0 and a = 1 (d) may increase or decrease depending on temperature (a) absolute temperature (b) different specific heat (d) convert water into steam and superheat it (b) longer wavelength (b) their atoms-are relatively far apart Ans: d, 33.

(c) kind and extent of its surface (d) depends upon the shape of body (b) 0.23 (e) lead. Ans: a, 61.

lol it did not even take me 5 minutes at all!

Log mean temperature difference in case of counter flow compared to parallel flow will be Ans: d, 100. (a) p = 0, x = 0 and a = 1 A grey body is one whose absorptivity

(d) conduction and convection Which of the following is/are example/s of heat exchanger? The unit of overall coefficient of heat transfer is (a) p = 0, x = 0 and a = 1 (c) forced convection Ans: b, 31. (b) 0.3 (a) same

(a) blast furnace Mean radius for heat transfer by conduction through hollow sphere of radii r1 and r2. Nusselt Number 9. radiation 15. We have made it easy for you to find a PDF Ebooks without any digging. Thermal diffusivity of a substance is (d) ratio of emissive power to absorptive power is maximum for perfectly black body Ans: b, 11.

(a) Krichoff’s law (c) p = 0, T= l,anda = 0

(e) none of the above. The ratio of (product of coefficient of heat transfer and length) and thermal conductivity. (e) boiling water. Heat is closely related with (d) thermocouple (b) solid ice (c) emissive power and absorptivity are constant for all bodies Copyright 2020 , Engineering Interview Questions.com, 300+ TOP HEAT TRANSFER Multiple Choice Questions and Answers. Ans: c, 103. (e) a = 0,x + p= 1. (e) none of the above.

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(c) Prandtl no. (d) Kirchoff’s law (e) Stefan’s law.

Thermal conductivity of a material may be defined as the (e) kcal-m/m2 °C. (c) conduction Finally I get this ebook, thanks for all these Heat Exchanger Question Answer I can get now! (d) inversely proportional to k2 where a = absorptivity, p = reflectivity, X = transmissivity. (c) Wien’ law (b) nature of the body Ans: a, 93. Unit of thermal conductivity in M.K.S. (d) all of the above

(a) reflected (c) increase the temperature of a liquid or vapour Heat Transfer Objective Questions :- MCQs.

(d) depends on the area of heat exchanger Upto the critical radius of insulation, (A) Added insulation will increase heat loss (B) Added insulation will decrease heat loss (C) Convective heat loss will be less than conductive heat loss (D) Heat flux will decrease. (a) better insulation should be put over pipe and better one over it

(c) radiation (a) moisture

units is (c) 0.01 (d) dynamic viscosity


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