62 practice sets · Page 2 of 4
The top edge is melted round and the cut face is not smooth in gas cutting. This is due to
extremely slow cutting speed
insufficient acetylene pressure
the tip being held too high
too much cutting oxygen pressure
The electrode size refers to
diameter of its core wire
diameter (overall) of electrode
thickness of flux coating
length of electrode
If the blowpipe is moved to and fro frequently while cutting the kerf will
be more
of correct size
be less
not be affected
While gas cutting the nozzle should
almost touch the work
be 10 mm away from work
be 2 mm away from work
be 5 mm away from work
Which fuel gas is used for cutting deep under water?
Acetylene
Hydrogen
LPG
Methane
The electrodes are manufactured in two standard lengths namely
350 mm and 250 mm
350 mm and 450 mm
400 mm and 500 mm
12 inches and 10 inches
Single-V and single-U butt welds are used for sheets of thickness upto
10mm
5-15mm
10-20mm
15-25mm
The temperature of arc in case of arc welding is
2000°C
2600°C
3000°C
3600°C
In arc welding, arc initiation voltage is of the order
20-60V
60-100V
100-140V
140-180V
In resistance welding, two electrodes are made of
Aluminium
Copper
Iron
Bronze
Which of the following is an example of fusion welding?
Arc welding
Forge welding
Resistance welding
Thermit welding with pressure
Which of the processes can be classified as fusion welding?
Arc welding and Laser beam welding
Friction welding and Laser beam welding
Friction welding and Ultrasonic welding
Ultrasonic welding and Laser beam welding
Which of the following is a weld joint?
T joints
Corner joints and edge joints
all of the above
butt and lap joints
Which of the following types is not fillet weld?
lap joint
T-joint
Corner joint
butt joint
The metals having good weldability, in descending order are
carbon steel, iron, cast steel, cast iron
iron, carbon steel, cast steel, cast iron
cast iron, iron, carbon steel, cast steel
cast steel, iron, carbon steel, cast iron
The voltage needed in resistance welding does not depend upon
Area
Thickness of weld
Length of weld
Composition
Which of the following is not true in regard to welding joint?
Heavy in weight
Economical
Have a pleasing appearance
Exhibit excellent strength characteristics equal to or even stronger than the base component
In which of the following process, heat is created by blacksmith fire
Spot welding
Projection welding
Seam welding
Forge welding
Which of the following ray is not produced during welding?
Visible light rays
Infrared ray
Ultra violet rays
Gamma rays
Which of the following welding process uses non-consumable electrode?
Shielded metal arc welding
shielded welding
Gas metal arc welding (MIG)
Gas tungsten arc welding (TIG)
