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.

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Condensation And Boiling MCQs | Page 3 of 7

Q21.
Condensation process is very common in

(i) Boilers
(ii) Condensers
(iii) Evaporators

Identify the correct statements
Discuss
Answer: (c).1, 2 and 3
Q22.
The convective coefficients for condensation usually lie in the range
Discuss
Answer: (d).2500-10000 W/m² K
Q23.
Drop wise condensation usually occurs on
Discuss
Answer: (a).Oily surface
Q24.
Consider the following statements:

(i) If a condensing liquid does not wet a surface, then drop wise condensation will not take place on it
(ii) Drop wise condensation gives a higher transfer rate than film wise condensation
(iii) Reynolds number of condensing liquid is based on its mass flow rate
(iv) Suitable coating or vapor additive is used to promote film wise condensation

Identify the correct statement
Discuss
Answer: (d).1, 2 and 3
Q25.
Depending upon the behavior of condensate up on the cooled surface, the condensation process are classified into how many distinct modes?

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q26.
A plate condenser was designed to be kept vertical. How would the condensation coefficient be effected if due to site constraints, it has to be kept at 60 degree to the horizontal?
Discuss
Answer: (c).3.53% reduction in condensation coefficient
Q27.
Saturated steam is allowed to condense over a vertical flat surface and the condensate film flows down the surface. The local coefficient of heat transfer for condensation
Discuss
Answer: (b).Decreases with increasing distance from the top of the surface
Q28.
In condensation over a vertical surface, the value of convection coefficient varies as
Discuss
Answer: (a).k^0.25
Q29.
For film wise condensation on a vertical plane, the film thickness δ and heat transfer coefficient h vary with distance x from the leading edge as
Discuss
Answer: (c).δ increases, h decreases
Q30.
What is the value of surface fluid constant for water-copper combination?
Discuss
Answer: (d).0.013
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