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Which gas is inactive or deficient is active chemical properties in TIG welding ?
A) argon B) hydrogen
C) oxygen D) acetylene

What is percentage of deposition efficiency in FCAW process ?

A) 93% to 97% B) 80% to 86%

C) 70% to 76% D) 60% to 67%

Which gas/mixture is likely to reduce the spatter loss in FCAW ?

A) argon and CO, mixed B) argon and helium mixed
C) CO, and helium mixed D) only CO, gas

What is the difficulty in starting of arc in GMAW ?

2
5

rong polarity B) unsteady hand

C) work piece dirty D) excess of voltage

What is the range of electrode for MAG/CO, welding ?
A) 0.8 mm to 1.6 mm 8) 0.7 mm to 1.3 mm
C) 0.6 mm to 0.9 mm D) 0.5 mm to 0.7 mm

In electron beam welding, electrons given off by the filament are accelerated and
focused by

A) Electron gun B) Electron beam
C) Vacuum pump D) Atmosphere

At the junction of the two sheets, the duration of current flow that results in the
formation of a molten nugget is known as

A) Squeeze time B) Hold time
C) Weld time D) Off time

The purpose of hard facing is to provide resistance to
A) Wear or abrasion B) Cavitation
C) Galling D) All the above

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