Mechanical Engineering  >  Topicwise Question Bank for Mechanical Engineering  >  Test: Heat Dissipation From Extended Surface - 1 Download as PDF

Test: Heat Dissipation From Extended Surface - 1


Test Description

10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering | Test: Heat Dissipation From Extended Surface - 1

Test: Heat Dissipation From Extended Surface - 1 for Mechanical Engineering 2022 is part of Topicwise Question Bank for Mechanical Engineering preparation. The Test: Heat Dissipation From Extended Surface - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Heat Dissipation From Extended Surface - 1 MCQs are made for Mechanical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Heat Dissipation From Extended Surface - 1 below.
Solutions of Test: Heat Dissipation From Extended Surface - 1 questions in English are available as part of our Topicwise Question Bank for Mechanical Engineering for Mechanical Engineering & Test: Heat Dissipation From Extended Surface - 1 solutions in Hindi for Topicwise Question Bank for Mechanical Engineering course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Test: Heat Dissipation From Extended Surface - 1 | 10 questions in 30 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Topicwise Question Bank for Mechanical Engineering for Mechanical Engineering Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you?
Test: Heat Dissipation From Extended Surface - 1 - Question 1

On a heat transfer surface, fins are provided to

Detailed Solution for Test: Heat Dissipation From Extended Surface - 1 - Question 1

Test: Heat Dissipation From Extended Surface - 1 - Question 2

Fins are used to increase heat transfer rate from a surface by
1. increasing the temperature difference
2. increasing the effective surface area
3. increasing the convective heat transfer coefficient
4. decreasing the thermal conductivity

Which of the above are true?

Test: Heat Dissipation From Extended Surface - 1 - Question 3

In order to achieve maximum heat dissipation the fin should be designed in such a way that it has

Detailed Solution for Test: Heat Dissipation From Extended Surface - 1 - Question 3

Fins are provided to a heat exchanger surface in such a way- that lateral surface area at root is maximum.

Test: Heat Dissipation From Extended Surface - 1 - Question 4

Two long rods A and B of the same diameter have thermal conductivities k and 4 k and have attached by one side of their ends inserted into a furnace at 400 K. At a section 1 m away from the furnace, the temperature of rod B is 120°C. At what distance from the furnace end, the same temperature would be reached in the rod A?

Detailed Solution for Test: Heat Dissipation From Extended Surface - 1 - Question 4


Test: Heat Dissipation From Extended Surface - 1 - Question 5

Fins are made as thin as possible to

Test: Heat Dissipation From Extended Surface - 1 - Question 6

A fin will be necessary and effective only when 
where k = thermal conductivity of fin material, h = convective heat transfer coefficient between the fin surface and environment temperature

Detailed Solution for Test: Heat Dissipation From Extended Surface - 1 - Question 6


so, for more effectiveness, k should be large and h should be small.

Test: Heat Dissipation From Extended Surface - 1 - Question 7

Which one of the following statements is correct?

Test: Heat Dissipation From Extended Surface - 1 - Question 8

A fin of length L protrudes from a surface held at temperature to; it being higher than the ambient temperature ta. The heat dissipation from the free end of the fin is stated to be negligibly small.
The temperature gradient at the fin tip  can then be expressed as

Detailed Solution for Test: Heat Dissipation From Extended Surface - 1 - Question 8

Test: Heat Dissipation From Extended Surface - 1 - Question 9

A fin protrudes from a surface which is held at a temperature higher than that of its environments. The heat transferred away from the fin is

Test: Heat Dissipation From Extended Surface - 1 - Question 10

Provision of fins on a given heat transfer surface will be more effective if there are .............. number of ................. fins.

Use Code STAYHOME200 and get INR 200 additional OFF
Use Coupon Code
Information about Test: Heat Dissipation From Extended Surface - 1 Page
In this test you can find the Exam questions for Test: Heat Dissipation From Extended Surface - 1 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Heat Dissipation From Extended Surface - 1, EduRev gives you an ample number of Online tests for practice