Condensation And Boiling MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Condensation And Boiling, a fundamental topic in the field of Heat Transfer. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Condensation And Boiling MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Condensation And Boiling mcq questions that explore various aspects of Condensation And Boiling problems. Each MCQ is crafted to challenge your understanding of Condensation And Boiling principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Heat Transfer tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Condensation And Boiling MCQs are your pathway to success in mastering this essential Heat Transfer topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Condensation And Boiling. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Condensation And Boiling MCQs | Page 2 of 7

Discover more Topics under Heat Transfer

Q11.
When evaporation takes place at the liquid-vapor interface, the heat transfer is solely due to free convection and the film coefficient follows the relation
Discuss
Answer: (a).Nu = f 1 (G r) f 2 (P r)
Discuss
Answer: (d).h = 1.973 (Q/A)^0.75
Q13.
A 0.10 cm diameter and 15 cm long wire has been laid horizontally and submerged in water at atmospheric pressure. The wire has a steady state voltage drop of 14.5 V and a current of 42.5 A. Determine the heat flux of the wire.
The following equation applies for water boiling on a horizontal submerged surface

H = 1.54 (Q/A)^0.75 = 5.58 (d t)³ W/m² K

where Q/A is the heat flux rate in W/m² and d t is the temperature difference between surface and saturation.
Discuss
Answer: (c).1.308 * 10โถ W/m²
Q14.
Natural convection heat transfer coefficients over surface of a vertical pipe and a vertical flat plate for same height. What is/are the possible reasons for this?

(i) Same height
(ii) Both vertical
(iii) Same fluid
(iv) Same fluid flow pattern

Select the correct answer
Discuss
Answer: (d).3 and 4
Q15.
The heat flux in nucleate boiling varies in accordance with
Discuss
Answer: (c).1/(h f g)²
Discuss
Answer: (a).Liquid properties, material and condition of the surface
Discuss
Answer: (b).Boiling occurs when a heated surface is exposed to a liquid and maintained at a temperature lower than the saturation temperature of the liquid
Q18.
Estimate the peak heat flux for water boiling at normal atmospheric pressure. The relevant thermo-physical properties are

p f (liquid) = 958.45 kg/m³
p g (vapor) = 0.61 kg/m³
h f g = 2.25 * 10โถ J/kg
ฯƒ = 0.0585 N/m
Discuss
Answer: (c).1.53 * 10โถ W/m²
Q19.
A 1.0 mm diameter and 300 mm long nickel wire is submerged horizontal in water at atmospheric pressure. At burnout, the wire has a current of 195 A. Calculate the voltage at burnout. The relevant thermos-physical properties are

p f (fluid) = 959.52 kg/m³
p g (vapor) = 0.597 kg/m³
h f g = 2257000 J/kg
ฯƒ = 0.0533 N/m
Discuss
Answer: (b).7.15 V
Discuss
Answer: (b).Vapor to a liquid phase
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