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MP Sub-Engineer ME: Conduction Quiz 56

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Question 1

Lorentz number is ___________.

Question 2

Temperature variation in the below composite wall is shown in the figure. Find the correct option __________?

Question 3

What is the specific name of the equation governing three- dimensional steady state heat conduction with self-heat generation __________?

Question 4

It is proposed to coat 2mm diameter wire with enamel paint

to increase heat transfer with air. If the air side heat transfer coefficient is

,Then what will be the optimum thickness of enamel Paint?

Question 5

Arrange the metals Aluminium, Copper, Iron & Silver in increasing order of thermal conductivity

Question 6

Conductivity of pure metal is always____.

Question 7

Critical radius of insulation for cylinder is given by _________.

Question 8

The temperature distribution associated with radial conduction through a sphere is represented by

Question 9

Three metal walls of same wall thickness and cross-sectional area have thermal conductivities k, 2k and 3k respectively. For the same heat transfers, the temperature drop across the walls will be in the ratio

Question 10

The refractory lining of a furnace has a thickness of 200 mm. The average thermal conductivity of the refractory material is 0.04 W/mK. The heat loss is estimated to be 180 kJ/hr-m². The temperature difference across the lining will be _________.

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AE & JE Exams Mechanical Engineering

May 31AE & JE Exams