All Courses
Get the App Signup / Login
Sign in Open App
Chemical Engineering Exam  >  Chemical Engineering Tests  >  Test: Heat Exchange Between Non Black Bodies - Chemical Engineering MCQ

Test: Heat Exchange Between Non Black Bodies - Chemical Engineering MCQ


Test Description

10 Questions MCQ Test - Test: Heat Exchange Between Non Black Bodies

Test: Heat Exchange Between Non Black Bodies for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Test: Heat Exchange Between Non Black Bodies questions and answers have been prepared according to the Chemical Engineering exam syllabus.The Test: Heat Exchange Between Non Black Bodies MCQs are made for Chemical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Heat Exchange Between Non Black Bodies below.
Solutions of Test: Heat Exchange Between Non Black Bodies questions in English are available as part of our course for Chemical Engineering & Test: Heat Exchange Between Non Black Bodies solutions in Hindi for Chemical Engineering course. Download more important topics, notes, lectures and mock test series for Chemical Engineering Exam by signing up for free. Attempt Test: Heat Exchange Between Non Black Bodies | 10 questions in 10 minutes | Mock test for Chemical Engineering preparation | Free important questions MCQ to study for Chemical Engineering Exam | Download free PDF with solutions
Test: Heat Exchange Between Non Black Bodies - Question 1
Save

Consider radiant heat exchange between two non-black parallel surfaces. The surface 1 emits radiant energy E 1 which strikes the surface 2. Identify the correct option

Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 1

The surface 1 emits radiant energy E 1 which strikes the surface 2. From it a part α2 E 1 is absorbed by the surface 2 and the remainder (1 – α2) E 1 is reflected back to surface 1 and so on.

Test: Heat Exchange Between Non Black Bodies - Question 2
Save

A large plane, perfectly insulated on one face and maintained at a fixed temperature T 1 on the bare face, has an emissivity of 0.84 and loses 250 W/m2 when exposed to surroundings at nearly 0 K. The radiant heat loss from another plane of the same size is 125 W/m2 when bare face having emissivity 0.42 and is maintained at temperature T 2 is exposed to the same surroundings. Subsequently these two planes are brought together so that the parallel bare faces lie only 1 cm apart and the heat supply to each is so regulated that their respective temperatures T 1 and T 2 remains unchanged. Determine he net heat flux between the planes

Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 2

Q 12 = F 12 A 1 σ b (T 14 – T 24). Since T 1 = T 2, we get Q 12/A1 = 0.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Heat Exchange Between Non Black Bodies - Question 3
Save

Interchange factor for body 1 completely enclosed by body 2 (body 1 is large) is given by

Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 3

This is the interchange factor for the radiation from surface 1 to surface 2.

Test: Heat Exchange Between Non Black Bodies - Question 4
Save

A thermos flask has a double walled bottle and the space between the walls is evacuated so as to reduce the heat flow. The bottle surfaces are silver plated and the emissivity of each surface is 0.025. If the contents of the bottle are at 375 K, find the rate of heat loss from the thermos bottle to the ambient air at 300 K
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 4

Q 12 = F 12 A 1 σ b (T 14 – T 24). F 12 = 1/ (1/E 1 + 1/E2 – 1) = 0.01266.

Test: Heat Exchange Between Non Black Bodies - Question 5
Save

A 250 mm by 250 mm ingot casting, 1.5 m high and at 1225 K temperature, is stripped from its mold. The casting is made to stand on end on the floor of a large foundry whose wall, floor and roof can be assumed to be at 300 K temperature. Make calculation for the rate of radiant heat interchange between the casting and the room. The casting material has an emissivity of 0.85
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 5

Q 12 = F 12 A 1 σ b (T 14 – T 24). F 12 = 0.85 and A 1 = (0.25)2 + 4(1.5) (0.25) = 1.5625 m2.

Test: Heat Exchange Between Non Black Bodies - Question 6
Save

Interchange factor for infinitely long concentric cylinders is given by
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 6

This is the interchange factor for the radiation from surface 1 to surface 2.

Test: Heat Exchange Between Non Black Bodies - Question 7
Save

What is the geometric factor for infinitely long concentric cylinders?
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 7

The inner cylinder is completely enclosed by the outer cylinder and as such the entire heat radiations emitted by the emitted by the inner cylinder are intercepted by the outer cylinder.

Test: Heat Exchange Between Non Black Bodies - Question 8
Save

 What is the geometric factor for concentric spheres?
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 8

The inner sphere is completely enclosed by the outer sphere and as such the entire heat radiations emitted by the emitted by the inner sphere are intercepted by the outer cylinder.

Test: Heat Exchange Between Non Black Bodies - Question 9
Save

The net heat interchange between non-black bodies at temperature T1 and T2 is given by
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 9

The factor f12 is called the interchanging factor from surface 1 to surface 2.

Test: Heat Exchange Between Non Black Bodies - Question 10
Save

A thermos flask has a double walled bottle and the space between the walls is evacuated so as to reduce the heat flow. The bottle surfaces are silver plated and the emissivity of each surface is 0.025. If the contents of the bottle are at 375 K and temperature of ambient air is 300 K. What thickness of cork (k = 0.03 W/m degree) would be required if the same insulating effect is to be achieved by the use of cork?
Detailed Solution for Test: Heat Exchange Between Non Black Bodies - Question 10

Q = k A (t 1 – t 2)/δ. So, δ = 0.268 m = 26.8 cm.

Information about Test: Heat Exchange Between Non Black Bodies Page
In this test you can find the Exam questions for Test: Heat Exchange Between Non Black Bodies solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Heat Exchange Between Non Black Bodies, EduRev gives you an ample number of Online tests for practice
Download as PDF

Important Questions for Heat Exchange Between Non Black Bodies

Find all the important questions for Heat Exchange Between Non Black Bodies at EduRev.Get fully prepared for Heat Exchange Between Non Black Bodies with EduRev's comprehensive question bank and test resources. Our platform offers a diverse range of question papers covering various topics within the Heat Exchange Between Non Black Bodies syllabus. Whether you need to review specific subjects or assess your overall readiness, EduRev has you covered. The questions are designed to challenge you and help you gain confidence in tackling the actual exam. Maximize your chances of success by utilizing EduRev's extensive collection of Heat Exchange Between Non Black Bodies resources.

Heat Exchange Between Non Black Bodies MCQs with Answers

Prepare for the Heat Exchange Between Non Black Bodies within the Chemical Engineering exam with comprehensive MCQs and answers at EduRev. Our platform offers a wide range of practice papers, question papers, and mock tests to familiarize you with the exam pattern and syllabus. Access the best books, study materials, and notes curated by toppers to enhance your preparation. Stay updated with the exam date and receive expert preparation tips and paper analysis. Visit EduRev's official website today and access a wealth of videos and coaching resources to excel in your exam.

Online Tests for Heat Exchange Between Non Black Bodies

Practice with a wide array of question papers that follow the exam pattern and syllabus. Our platform offers a user-friendly interface, allowing you to track your progress and identify areas for improvement. Access detailed solutions and explanations for each test to enhance your understanding of concepts. With EduRev's Online Tests, you can build confidence, boost your performance, and ace Heat Exchange Between Non Black Bodies with ease. Join thousands of successful students who have benefited from our trusted online resources.
© EduRev
Education Revolution
Follow Us
Signup to see your scores go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup