Welding 10 Most Expected Questions for GATE 2027 | Production Engineering | S K Mondal Sir

Welding 10 most expected questions for GATE 2027 Mechanical Engineering (ME) and Production Engineering (PI), solved live by S K Mondal Sir (Ex-IES). Selected from concepts GATE has asked again and again: arc V-I characteristic (open circuit voltage and short circuit current), maximum arc power and arc length, heat required per unit volume, MIG wire feed and melting efficiency, base metal dilution, peak temperature in TIG welding, spot welding nugget and melting efficiency, flash butt welding, electrodes needed for a fillet weld, and welding process selection. Useful for: GATE ME & PI, ESE, ISRO, BARC, PSUs, SSC JE and RRB JE. GATE Scholarship Test - https://unacademy.com/scholarship/UGS... Free Personalised Planner - https://unacademy.com/content/gate/fr... ⏱️ Chapters 0:00 Welding: 10 Most Expected Questions 0:45 Q1: Arc V-I Characteristic from Two Readings 3:27 Short Circuit: Zero Voltage 5:36 Current at Each Arc Length 7:01 Setting Up the Two Equations 9:12 Solving: Open Circuit Voltage & Short Circuit Current 11:16 Q2: Maximum Arc Power & Arc Length 13:16 Open Circuit Voltage from the Characteristic 15:27 Maximum Power at Half the Open Circuit Voltage 16:10 Arc Length for Maximum Power 18:20 Q3: Heat Required per Unit Volume 20:29 Joules per mm³: Watch the Units 21:56 Heat Supplied: Voltage × Current 24:48 Heat Lost by Conduction 26:11 Q4: MIG Welding: Wire Feed & Melting Efficiency 28:23 Arc Power = V × I 30:33 Metal Melted per Second: πd²/4 × Wire Speed 32:27 Heat Needed for Melting 34:32 Converting to SI Units 35:13 Melting Efficiency Answer 36:41 Q5: Filler & Base Metal Dilution 37:44 Break 41:13 Heat Transfer & Melting Efficiency 43:27 Base Metal Melted: 40% 44:54 Electrode Cross-Section × Feed Rate 47:46 Q6: TIG Welding: Peak Temperature in Two Cases 49:14 Heat Generated: V × I 50:38 Ratio Method: Cancelling Common Terms 52:01 Effect of Welding Speed 54:55 Q7: Spot Welding: Nugget Heat & Efficiency 55:38 Work in Joules 56:19 Nugget Mass from Density 58:59 Electrical Heat: I²Rt 59:40 Melting Efficiency 1:01:08 Q8: Flash Butt Welding: Heat Balance 1:03:10 Metal Melted at the Joint 1:05:25 Heat Required & Time 1:07:29 Q9: T-Joint Fillet Weld: Number of Electrodes 1:09:32 Weld Cross-Section Area 1:11:34 Weld Volume 1:12:14 Volume of One Electrode 1:13:36 Q10: Welding Process Selection 1:14:16 Friction Welding 1:16:22 MIG: Continuous Wire Feed 1:17:04 Electron Beam: Non-Consumable 1:17:50 Summary: All 10 Covered 1:18:30 QR Code, Telegram & Test Series 1:19:59 Closing 📚 Learn Welding completely: Welding Class 1 FREE:    • Welding Basics for GATE 2027 ME & PI |Prod...   Welding & Casting One Shot:    • Welding & Casting One Shot: Gas, Arc, Resi...   Arc Welding Numericals (Production Part 6):    • Arc Welding Numericals: V-I Characteristic...   Welding Numericals: Arc & Spot (Production Part 7):    • Welding Numericals for GATE: Arc & Spot We...   📚 GATE 2027 Most Expected Questions Playlist:    • GATE 2027 Most Expected Questions | S K Mo...   👨‍🏫 S K Mondal Sir (Ex-IES) | Unacademy ME PI XE 📢 Telegram: https://t.me/skmondalmaa 🎯 GATE 2027 preparation: https://unacademy.com/goal/Gate/QGFRK... Referral code: KHUSHRAHO #ProductionEngineering #MechanicalEngineering #GATE2027