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Mechanical Engineering Exam  >  Mechanical Engineering Test  >  Heat Transfer  >  Test: Nucleate Boiling - Mechanical Engineering MCQ

Nucleate Boiling - Free MCQ Practice Test with solutions, GATE ME Heat


MCQ Practice Test & Solutions: Test: Nucleate Boiling (10 Questions)

You can prepare effectively for Mechanical Engineering Heat Transfer with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Nucleate Boiling". These 10 questions have been designed by the experts with the latest curriculum of Mechanical Engineering 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 10 minutes
  • - Number of Questions: 10

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Test: Nucleate Boiling - Question 1
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Reynolds number is replaced by a modulus significant of the agitation of the fluid particles in nucleate boiling. Such a dimensionless modulus is defined by the relation

Where, D b is the average bubble diameter, G b is the mass velocity of the bubble per unit area and δ f is the fluid viscosity

Detailed Solution: Question 1

This nucleate boiling regime is of great importance because of the very high heat fluxes possible with moderate temperature differences.

Test: Nucleate Boiling - Question 2
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The bubble diameter has been expressed by Fritz as

Where, C d is a constant, σ is surface tension of the liquid and β is the bubble contact angle measured through liquid in degrees

Detailed Solution: Question 2

C d is a constant which has been evaluated as 0.0148 for hydrogen and water bubbles.

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Test: Nucleate Boiling - Question 3
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What is the value of surface fluid constant for water-copper combination?

Detailed Solution: Question 3

The surface fluid regime is of great importance because of the very high heat fluxex possible with moderate temperature differences.

Test: Nucleate Boiling - Question 4
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What is the value of surface fluid constant for water-brass combination?

Detailed Solution: Question 4

For H2O and Brass combination, this value must lie between 0.0056 to 0.00062.

Test: Nucleate Boiling - Question 5
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Spherical bubbles of 3 mm diameter are observed in the bulk fluid boiling of water at standard atmospheric pressure. Assuming pure water vapor in the bubble and vapor pressure equal to 101.325 k N/m2, calculate the temperature of the vapor

Detailed Solution: Question 5

T v – T sat = (2 σ/r – p g) R v T V2/p v h f g.

Test: Nucleate Boiling - Question 6
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An electric wire of 1.25 mm diameter and 250 mm long is laid horizontally and submerged in water at 7 bar. The wire has an applied voltage of 2.2 V and carries a current of 130 amperes. If the surface of the wire is maintained at 200 degree Celsius, make calculations for the heat flux

Detailed Solution: Question 6

Q= V I = 286 W and A = 9.81 * 10 -4 m2. Therefore heat flux = Q/A.

Test: Nucleate Boiling - Question 7
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Consider the above problem, find the boiling heat transfer coefficient

Detailed Solution: Question 7

Q = h A d t. So, h = 8330 W/m2 K.

Test: Nucleate Boiling - Question 8
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Which of the following parameters affect burnout heat flux in the nucleate boiling region
(i) Heat of evaporation
(ii) Temperature difference
(iii) Density of vapor
(iv) Density of liquid
(v) Surface tension at the vapor-liquid interface
Mark the correct answer from the codes indicated below

Detailed Solution: Question 8

Acc to Zuber relation, burn out (Q/A) = 0.18 p g h f g [p (p f – p g)/p g 2] 0.25 [p f/p g + p f] 0.5.

Test: Nucleate Boiling - Question 9
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All the following statements are correct, except

Detailed Solution: Question 9

A rough surface gives a better heat transmission than when the surface is either smooth or has been coated to weak its tendency to get wetted.

Test: Nucleate Boiling - Question 10
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Milk spills over when it is boiled in an open vessel. The boiling of milk at this instant is referred to as

Detailed Solution: Question 10

This is an application of sub-cooled boiling.

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About this Mechanical Engineering Practice Test

This test contains 10 MCQs on Nucleate Boiling with detailed solutions for each question. It is part of the Heat Transfer course on EduRev, designed to align with the current Mechanical Engineering syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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