Welding MCQ

Test your knowledge with important Welding MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Welding MCQs at Bissoy

• Cup head riveting provides maximum strength.
  ক

  True

  খ

  False
• There can be 4 rows of rivets in lap joint.
  ক

  True

  খ

  False
• Which of the following materials is not used in making rivets?
  ক

  Wrought iron

  খ

  Mild steel

  গ

  Brass

  ঘ

  Calcium
• The following figure represents which rivet head?
  ক

  Pan head

  খ

  Conical head

  গ

  Countersunk head

  ঘ

  Cup head
• Which of the following articles is not manufactured using riveting?
  ক

  Rail wagons

  খ

  Coaches

  গ

  Pressure vessels

  ঘ

  Helmets
• The following figure represents which type of adhesive bonded joint?
  ক

  Butt unsatisfactory

  খ

  Plain lap good

  গ

  Beveled lap excellent

  ঘ

  Scarf better
• Carbon steels can be fusion welded.
  ক

  True

  খ

  False
• Low carbon steels need not be preheated before welding.
  ক

  True

  খ

  False
• What is the temperature needed for preheating in cast irons?
  ক

  550°C

  খ

  600°C

  গ

  650°C

  ঘ

  700°C
• Which of the following is not a material used for making an electrode in metal arc welding, for treating stainless steels?
  ক

  Niobium

  খ

  Columbium

  গ

  Titanium

  ঘ

  Potassium
• Stainless steels are annealed at what temperature?
  ক

  650°C – 700°C

  খ

  700°C – 750°C

  গ

  750°C – 800°C

  ঘ

  800°C – 850°C
• Which among the following methods is best suited for stainless steels?
  ক

  Electric butt welding

  খ

  Seam welding

  গ

  Flux coated arc welding

  ঘ

  Oxy-hydrogen welding
• Which of the following material is not used in alloy steels?
  ক

  Molybdenum

  খ

  Nickel

  গ

  Chromium

  ঘ

  Sodium
• Up to what percent of carbon content in steel, it is not required to preheat it?
  ক

  0.25% – 0.3%

  খ

  0.3% – 0.35%

  গ

  0.35% – 0.4%

  ঘ

  0.4% – 0.45%
• High alloys steels are preheated up to what temperature?
  ক

  350°C

  খ

  400°C

  গ

  450°C

  ঘ

  500°C
• Which of the following methods cannot be used for welding carbon steel?
  ক

  Arc welding

  খ

  Gas welding

  গ

  Ultrasonic welding

  ঘ

  Forge welding
• Oxygen cutting process can be applied to metals having a melting point higher than their oxidization temperature.
  ক

  True

  খ

  False
• Cast irons are best treated using oxygen cutting process.
  ক

  True

  খ

  False
• What should the outer diameter of a thick-welled lance be, for having good results?
  ক

  13 mm to 15 mm

  খ

  15 mm to 17 mm

  গ

  17 mm to 19 mm

  ঘ

  19 mm to 21 mm
• What is the initial oxygen pressure provided through the lance?
  ক

  1 atm to 2 atm

  খ

  2 atm to 3 atm

  গ

  3 atm to 4 atm

  ঘ

  4 atm to 5 atm
• What is the minimum oxygen pressure that can be applied to steel?
  ক

  3 atm

  খ

  4 atm

  গ

  5 atm

  ঘ

  6 atm
• What is the maximum oxygen pressure that can be applied to steel?
  ক

  13 atm

  খ

  14 atm

  গ

  15 atm

  ঘ

  16 atm
• What are the number of opening available in the cutting torch used in oxygen cutting process?
  ক

  4

  খ

  5

  গ

  6

  ঘ

  7
• Up to what temperatures are high alloy steels heated before treating them by oxygen cutting?
  ক

  675°C

  খ

  725°C

  গ

  775°C

  ঘ

  825°C
• Up to what amount of carbon content in steels, can they be treated by oxygen cutting?
  ক

  0.3%

  খ

  0.2%

  গ

  0.7%

  ঘ

  0.4%
• Which gas is used for the removal of oxygen layer formed on molten iron?
  ক

  Hydrogen

  খ

  Oxygen

  গ

  Carbon dioxide

  ঘ

  Chlorine
• ‘α’ is the angle between target plate and flyer plate.
  ক

  True

  খ

  False
• Which of the following is not a factor for explosive welding?
  ক

  High relative velocity

  খ

  Less amount of plastics

  গ

  Proper orientation

  ঘ

  High pressure
• What is the minimum thickness that can be welded in ultrasonic welding?
  ক

  0.58 mm

  খ

  0.21 mm

  গ

  0.38 mm

  ঘ

  0.92 mm
• Electric currents are passed is ultrasonic welding.
  ক

  True

  খ

  False