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Mechanical Engineering Exam  >  Mechanical Engineering Test  >  Heat Transfer  >  Test: Newton Rikhman Law - Mechanical Engineering MCQ

Newton Rikhman Law - Free MCQ Practice Test with solutions, GATE ME Heat


MCQ Practice Test & Solutions: Test: Newton Rikhman Law (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: Newton Rikhman Law". 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: 20 minutes
  • - Number of Questions: 10

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Test: Newton Rikhman Law - Question 1
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Newton-Rikhman law is given by

Detailed Solution: Question 1

Regardless of the particular nature, the appropriate rate equation for the convective heat transfer is prescribed by Newton’s law of cooling.

Test: Newton Rikhman Law - Question 2
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The value of film coefficient is dependent upon
(i) Boundary layer configuration
(ii) Geometry and orientation of the surface
(iii) Surface conditions

Detailed Solution: Question 2

It depends upon surface conditions i.e. roughness and cleanliness, geometry and orientation of the surface i.e. plate, tube and cylinder placed vertically or horizontally.

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Test: Newton Rikhman Law - Question 3
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The convection coefficients for boiling and condensation lie in the range

Detailed Solution: Question 3

Convection mechanisms involving phase changes lead to important field of boiling and condensatio.

Test: Newton Rikhman Law - Question 4
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Forced air flows over a convection heat exchanger in a room heater, resulting in a convective heat transfer coefficient 1.136 k W/m2 K. The surface temperature of heat exchanger may be considered constant at 65 degree Celsius, and the air is at 20 degree Celsius. Determine the heat exchanger surface area required for 8.8 k W of heating

Detailed Solution: Question 4

Q = h A (t s – t f). So. A = 0.172 m2.

Test: Newton Rikhman Law - Question 5
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A region of fluid motion near a plate in which temperature gradient exist is

Detailed Solution: Question 5

The fluid velocity decreases as it approaches the solid surface reaching to zero in the fluid layer immediately next to the surface. The thin layer of stagnated fluid is called thermal boundary layer.

Test: Newton Rikhman Law - Question 6
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Thermo-physical properties of the fluid are represented by
(i) Density
(ii) Viscosity
(iii) Specific heat
(iv) Thermal conductivity
Identify the correct option

Detailed Solution: Question 6

The value of film coefficient is dependent upon thermos-physical properties of he fluid i.e. density, viscosity, specific heat, coefficient of expansion and thermal conductivity.

Test: Newton Rikhman Law - Question 7
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A motor cycle cylinder consists of ten fins, each 150 mm outside diameter and 75 mm inside diameter. The average fin temperature is 500 degree Celsius and the surrounding air is at 20 degree Celsius temperature. Make calculations for the rate of heat dissipation from the cylinder fins by convection when motor cycle is stationary and convective coefficient is 6 W/m2K

Detailed Solution: Question 7

A = 0.265 m2 and Q = (6) (0.265) (500 – 20) = 763.2 W.

Test: Newton Rikhman Law - Question 8
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Consider the above problem, make calculations for the rate of heat dissipation from the cylinder fins by convection when motor cycle is moving at 60 km/hr and convective coefficient is 75 W/m2 K

Detailed Solution: Question 8

A = 0.265 m2 and Q = (75) (0.265) (500 – 20) = 9540 W.

Test: Newton Rikhman Law - Question 9
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The temperature profile at a particular location on a surface is prescribed by the identity
(t s – t) / (t s – t infinity) = (1/2) (y/0.0075) 3 + (3/2) (y/0.0075)
If thermal conductivity of air is stated to be 0.03 W/m K, determine the value of convective heat transfer coefficient

Detailed Solution: Question 9

h = – k/ (t s – t infinity) [d t/d y] y = 0.

Test: Newton Rikhman Law - Question 10
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Air at 20 degree Celsius flows over a flat surface maintained at 80 degree Celsius. The local heat flow at a point was measured as 1250 W/m2 .Take thermal conductivity of air as 0.028 W/m K, calculate the temperature at a distance 0.5 mm from the surface

Detailed Solution: Question 10

Temperature at 0.5 mm from the surface is 80 + (d t/d y) y = 0 (0.0005) = 57.682 degree celsius.

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About this Mechanical Engineering Practice Test

This test contains 10 MCQs on Newton Rikhman Law 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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If you found this Newton Rikhman Law MCQ Test helpful, you can further enhance your Mechanical Engineering preparation with in-depth courses on EduRev, for all the subjects and topics available in Heat Transfer course. The course offers:
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