31.The portion of the base metal that has not been melted but whose microstructure has been
altered by heat of welding is called.
a) Fusion zone
b) Heat affected zone
c) Dead zone
d) Twilight zone
32.In a bend test, when the face of the specimen is in tension and the root is in compressmn
the test is called a
a) Root bend test
b) Side bend test
¢) Face bend test
d) Longitudinal bend test
33.Slag inclusion may be present in.
a) Manual metal arc welds
b) Metal inert gas welds
c) Metal active gas welds
d) All of these
34.The principal purpose of a welder qualification test is to,
a) Test the skill of the welder
b) Assess the weldability of the materials
c) Decide which NDT method to use
d) Give the welder practice before doing production welding
35.Visual inspection of a fabricated item of high quality application should cover inspection
activities, .
a) Before, during and after welding
b) Before welding only
c) After welding only
d) During and after welding only
36.Which mechanical test can be used to measure the toughness of weld metal, HAZ and
parent metal?
a) Macro examination
b) Nick break test
c) Hardness test
d) Charpy impact test
37.A unit of power is.expressed in
a) Volt
b) Ampere
c) Watt
d) Ohm
38.Which one of the following is a non-destructive test?
a) Impact test .
b) Tensile test
c) Nick break test
d) Magnetic particle test
39.The advantage of electron beam welding i,
a) Single pass welding of thick joints
b) Low distortion
¢) -Narrow heat affected zone
d) All of these
40.Using oil or grease on an oxygen regulator is likely to,
a) Cause grease to burn
b) Cause the regulator to burn
c) Cause the cylinder to explode
d) All of these