Manufacturing Technology-Joining, Machining and Metal Casting Processes - Set 06 - ObjectiveBooks

Manufacturing Technology-Joining, Machining and Metal Casting Processes - Set 06

Practice Test: Question Set - 06

1. Which one of the following is a solid state joining process?
    (A) Gas tungsten arc welding
    (B) Resistance spot welding
    (C) Friction welding
    (D) Submerged arc welding

2. While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine?
    (A) GTAW
    (B) Open air cut voltage
    (C) Kerf
    (D) Gouging

3. The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as?
    (A) Weldment
    (B) Weld tab
    (C) Weldability
    (D) Tack weld

4. In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions.
    (A) ARC welding
    (B) Submerged ARC welding
    (C) TIG welding
    (D) MIG welding

5. In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops/sec or less, what is this known as
    (A) Globular transfer
    (B) Spray transfer
    (C) GMAW practice
    (D) Dip transfer

6. What is the type of shielding gas for GTAW (Gas Tungsten Arc Welding) used for carbon steels only called?
    (A) Argon H₂
    (B) Argon CO₂
    (C) Argon Helium
    (D) Helium

7. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
    (A) Carburizing flame
    (B) Oxidizing flame
    (C) Oxy-acetylene flame
    (D) Neutral flame

8. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
    (A) 0.20
    (B) 0.30
    (C) 0.50
    (D) 0.60

9. What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
    (A) Reactor
    (B) Kerf
    (C) Inductor
    (D) Cone

10. Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be
    (A) 0.2 Joule
    (B) 1 Joule
    (C) 5 Joule
    (D) 1000 Joule

11. In up-cut milling the work piece is fed
    (A) Against the rotating cutter
    (B) At angle of 60° to the cutter
    (C) In the direction of the cutter
    (D) At the right angle to the cutter

12. Which of the following statement is correct regarding grinding of high carbon steel?
    (A) Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.
    (B) Aluminium oxide wheels are employed.
    (C) The grinding wheel has to be of open structure.
    (D) All of the above

13. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
    (A) 3500°C
    (B) 3200°C
    (C) 2900°C
    (D) 2550°C

14. Which of the following arc welding processes does not use consumable electrodes?
    (A) GMAW
    (B) GTAW
    (C) Submerged Arc Welding
    (D) None of these

15. Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
    (A) Adjusting the current
    (B) Adjusting the duration of current
    (C) Changing the electrode size
    (D) Changing the electrode coating

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