Mechanical Joining Process Practice Test - Set 01

Practice Test: Question Set - 01


1. If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
    (A) ARC
    (B) Short ARC
    (C) ARC length
    (D) ARC blow

2. Which one among the following welding processes uses non-consumable electrode?
    (A) Gas metal arc welding
    (B) Submerged arc welding
    (C) Gas tungsten arc welding
    (D) Flux coated arc welding

3. What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
    (A) Thermit welding
    (B) Electroslag welding
    (C) Resistance welding
    (D) Submerged arc Welding

4. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.
    (A) Single riveted
    (B) Double riveted
    (C) Both (A) and (B)
    (D) None of these

5. In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position.
    (A) Globular transfer
    (B) Spray transfer
    (C) GMAW practice
    (D) Dip transfer

6. In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
    (A) Electric arc welding
    (B) Submerged arc welding
    (C) MIG welding
    (D) TIG welding

7. The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called?
    (A) Distortion
    (B) Warping
    (C) Porous weld
    (D) Poor fusion

8. The object of caulking in a riveted joint is to make the joint
    (A) Free from corrosion
    (B) Stronger in tension
    (C) Free from stresses
    (D) Leak-proof

9. Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz.
    (A) 3000 welds/min, 75 mm/min
    (B) 600 welds/min, 1500 mm/min
    (C) 500 welds/min, 1250 mm/min
    (D) 22 welds/min, 55 mm/min

10. What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?
    (A) Torch brazing
    (B) Dip brazing
    (C) Resistance brazing
    (D) Furnace brazing

11. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.
    (A) 2.17 rpm, 600 joules
    (B) 6.8 rpm, 6 joules
    (C) 5.03 rpm, 600 joules
    (D) 22 rpm, 600 joules

12. In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
    (A) Fusion
    (B) Reverse polarity
    (C) Forward welding
    (D) Direct polarity

13. What is the welding defect caused due to improper control and poor removal of slog between passes called?
    (A) Mismatch
    (B) Under fill
    (C) Crack
    (D) Porosity

14. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?
    (A) Distortion
    (B) Warping
    (C) Porous weld
    (D) Poor fusion

15. What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?
    (A) Incomplete fusion
    (B) Lamellar tearing
    (C) Mismatch
    (D) Shrinkage void

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