Arc Welding MCQ

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

• The negative pole of the electrode burns away faster than the positive pole.
  ক

  True

  খ

  False
• Which material is not used as an iron coating on the electrode used in arc welding?
  ক

  Cellulose

  খ

  Iron powder

  গ

  Calcium fluoride

  ঘ

  Steel
• Arc welding machine uses only D.C. supply.
  ক

  True

  খ

  False
• What amount of electricity gets converted into heat energy in an arc welding process?
  ক

  0.25 kWh

  খ

  0.75 kWh

  গ

  1 kWh

  ঘ

  2 kWh
• Which type of electrode is designed for melting quickly?
  ক

  Fast fill

  খ

  Fast freeze

  গ

  Quick fill

  ঘ

  Fill freeze
• In arc welding process, the high quality alternator functions at what frequency?
  ক

  250 Hz

  খ

  300 Hz

  গ

  350 Hz

  ঘ

  400 Hz
• What is the length of the arc generally?
  ক

  1mm – 2mm

  খ

  2mm – 3mm

  গ

  3mm – 4mm

  ঘ

  4mm – 5mm
• The distance from the center of arc to the tip of electrode is called what?
  ক

  Arc distance

  খ

  Arc length

  গ

  Arc crater

  ঘ

  Arc depth
• What is the order of temperature of heat produced in an electric arc furnace?
  ক

  3000°C – 4000°C

  খ

  4000°C – 5000°C

  গ

  5000°C – 6000°C

  ঘ

  6000°C – 7000°C
• In order to prevent oxidation and retain molten metal in stud welding which of the following is used?
  ক

  Ceramic rings

  খ

  Metal rings

  গ

  Non-metal rings

  ঘ

  Flux
• Which of the following inert gas is used with DC power supply only?
  ক

  Argon

  খ

  Helium

  গ

  CO2

  ঘ

  Nitrogen
• Which of the following gas welding process uses constant voltage?
  ক

  Submerged arc welding

  খ

  Tungsten inert gas welding

  গ

  Stud welding

  ঘ

  Gas metal arc welding
• If the total efficiency is 0.35 in arc welding. Then what is the welding speed in mm/sec if the cross-sectional area is 5mm2, welding power is 2 kW and the heat required in melting the metal is 100 J/mm3.
  ক

  1.4

  খ

  14

  গ

  1400

  ঘ

  140
• The deflection of the arc in arc blow is by?
  ক

  Electric field

  খ

  Magnetic field

  গ

  Combination of both

  ঘ

  Hydrostatic field
• If the heat transfer efficiency is 0.5 and the melting efficiency is 0.6, then the overall efficiency will be?
  ক

  0.83

  খ

  0.03

  গ

  0.30

  ঘ

  0.12
• In plasma arc welding the gas is?
  ক

  Ionized

  খ

  Heated

  গ

  Magnetized

  ঘ

  Vaporized
• What is the only difference between Plasma arc welding and TIG welding?
  ক

  Flux is not used

  খ

  Construction of torch is different

  গ

  Gas is not used

  ঘ

  Tungsten electrode is not used
• In which of the following gas welding process a non-consumable electrode is used?
  ক

  Submerged arc welding

  খ

  Tungsten inert gas welding

  গ

  Stud welding

  ঘ

  Gas metal arc welding
• What is the function of flux in submerged arc welding?
  ক

  To completely cover the welded zone

  খ

  To prevent oxidation of joint

  গ

  To prevent spattering of molten metal

  ঘ

  To prevent sticking of molten metal
• How does the arc voltage V depends upon the length of arc L?
  ক

  V = f(L)

  খ

  V = 1/f(L)

  গ

  V = f(L2)

  ঘ

  V = f(√L)
• Amount of current required to generate the arc under no load condition is called?
  ক

  Open circuit current

  খ

  Closed circuit current

  গ

  Short circuit current

  ঘ

  Arc current
• Amount of voltage required to generate the arc under no load condition is called?
  ক

  Open circuit voltage

  খ

  Closed circuit voltage

  গ

  Short circuit voltage

  ঘ

  Arc voltage
• Amount of time during which the transformer will be used for welding under normal loading condition is known as?
  ক

  Hold time

  খ

  Off time

  গ

  Weld time

  ঘ

  Duty cycle