Mechanical Engineering Exam > Mechanical Engineering Questions > A spot welding obtained with a current of 400...
Start Learning for Free
A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)
Correct answer is '1071.8'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
A spot welding obtained with a current of 40000 A for a period of 0.01...
Given,
Current (I) = 40000 A
Time (t1) = 0.01s
Resistance (R) = 120μΩ = 120x 10-6 Ω
Nugget formed is cylindrical with diameter (dn) = 6mm
Height (hn) = 3 mm
Total heat required for melting steel = 10 J/mm3
Current (I) = 40000 A
Time (t1) = 0.01s
Resistance (R) = 120μΩ = 120x 10-6 Ω
Nugget formed is cylindrical with diameter (dn) = 6mm
Height (hn) = 3 mm
Total heat required for melting steel = 10 J/mm3
So heat required for melting steel = 10x34.82 = 848.2 J
So, heat lost surrounding per nugget = 1920 - 848.2 = 1071.8 J
Most Upvoted Answer
A spot welding obtained with a current of 40000 A for a period of 0.01...
Calculation of Heat Distributed to Surroundings in Spot Welding
Given data:
Current (I) = 40000 A
Time (t) = 0.01 sec
Effective resistance (R) = 120 micro ohms = 0.00012 ohms
Diameter of cylinder (d) = 6 mm
Height of cylinder (h) = 3 mm
Heat required for melting steel (Q) = 10 J/mm3
Formula used:
Heat (H) = I²Rt
Calculation:
Area of cylinder (A) = πd²/4 = 0.02827 mm²
Volume of cylinder (V) = Ah = 0.08481 mm³ = 8.481×10^-8 m³
Resistance (r) = R(V/A) = 0.042 ohms
Heat (H) = I²rt = 64.32 J
Heat distributed to surroundings (Q) = HV = 64.32×8.481×10^-8 = 0.00545 J
Total heat distributed to surroundings = Q × Q = 0.00545 × 196 = 1.0678 J
Rounding off to one decimal place, we get the answer as 1071.8 J.
Answer: 1071.8 J
Given data:
Current (I) = 40000 A
Time (t) = 0.01 sec
Effective resistance (R) = 120 micro ohms = 0.00012 ohms
Diameter of cylinder (d) = 6 mm
Height of cylinder (h) = 3 mm
Heat required for melting steel (Q) = 10 J/mm3
Formula used:
Heat (H) = I²Rt
Calculation:
Area of cylinder (A) = πd²/4 = 0.02827 mm²
Volume of cylinder (V) = Ah = 0.08481 mm³ = 8.481×10^-8 m³
Resistance (r) = R(V/A) = 0.042 ohms
Heat (H) = I²rt = 64.32 J
Heat distributed to surroundings (Q) = HV = 64.32×8.481×10^-8 = 0.00545 J
Total heat distributed to surroundings = Q × Q = 0.00545 × 196 = 1.0678 J
Rounding off to one decimal place, we get the answer as 1071.8 J.
Answer: 1071.8 J
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Top Courses for Mechanical EngineeringView all
A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer?
Question Description
A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer?.
A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer?.
Solutions for A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer?, a detailed solution for A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? has been provided alongside types of A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A spot welding obtained with a current of 40000 A for a period of 0.01 sec. If the effective resistance of the joint be taken as 120 micro ohms, and if the joint can be considered as a cylinder of 6mm diameter and 3 mm in height, the heat distributed to the surroundings is ________ J. (Take heat re q u ired for m eltin g steel as 10 J/mm3)Correct answer is '1071.8'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© 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