In an arc welding experiment, the current, voltage and electrode travel speed were 140 A, 22 V, and 15 cm/min respectively. The heat input per unit length of the weld is given by . . . . . . . . kJ/cm.

Stainless steel is welded using

A. oxy-acetylene flame

B. oxy-hydrogen flame

C. arc welding

D. inert gas arc welding

The nature of submerged arc welding flux with basicity index of 0.5 is

A. neutral

B. basic

C. semi-basic

D. acidic

Lap joints are preferred over butt joints in soldering/brazing because

A. these are weaker in tension but stronger in shear

B. these are weaker in shear but stronger in tension

C. these are stronger in both shear and tension

D. the lap joints are easily made

For a good quality brazing, the molten filler alloy should have

A. low contact angle with the base metal

B. low density

C. high surface tension

D. high viscosity