GATE ME · 2021 · ME
Question 37: Casting, Forming and Joining Processes
Give it a try, then reveal the answer to check your work.
Question 37
MENAT2 marksNeeds review
The resistance spot welding of two 1.55 mm thick metal sheets is performed using welding current of 10000 A for 0.25 s. The contact resistance at the interface of the metal sheets is 0.0001 Ω. The volume of weld nugget formed after welding is 70 mm
. Considering the heat required to melt unit volume of metal is 12 J/mm
, the thermal efficiency of the welding process is ______ % (round off to one decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerEXPLORE & PRACTISE
Paper and topic context
See where this question comes from and choose what to practise next.
2021ME
GATE ME 2021 · Paper 1
Mechanical Engineering · Original paper archive
- Section
- Mechanical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
Practise related topics
Explore more previous year questions using this question’s imported topic tags.
mechanical engineering
GATE ME previous year questions
mechanics
GATE ME previous year questions
manufacturing
GATE ME previous year questions
Casting, Forming and Joining Processes
GATE ME previous year questions
welding
GATE ME previous year questions
Comments
Ask a question, share your approach, or help someone understand.
Log in to view the discussion
You’re not logged in. Log in or create an account to see discussions and add comments.