A.At the surface
B.Through the metals to be welded
C.At the point of contact of the metal to be welded
D.At the point where electrode contacts the metal
E.None of the above
A.A switch which operates for a fixed time only
B.A switch which gets energised with time
C.A 24 hour timing device used to open and close electric circuits according to time of day on a continually repeating schedule
D.A switch with records timings of operation of a circuit
E.None of the above
A.Shear plane and job surface
B.Shear plane and verticalplane
C.Shear plane and horizontal plane
D.Shear plane and tool surface
E.Shear plane and tool axis
A.Mild steel
B.Cast steel
C.Pig iron
D.Close grain cast iron
E.Alloy steel
A.Alumina, clay and silica
B.Alumina and clay
C.Aluminium and silica
D.Silica and binder
E.Silica and clay
A.is complexity of components
B.is costly maintenance
C.Suffers from the transmission lags and slow response
D.None of the above
E.All of the above
A.Holding the work piece between clamps and pouring water on it
B.Hoding the work piece vertically over the quenching bath and plunging it straight
C.Pulling the piece from both ends
D.Holding the piece horizontally in adequate supports
E.None of the above
A.Combustion of gases
B.Electric arc
C.Reaction of oxygen with metal
D.Chemical reaction involving finely divided aluminium and iron oxide
E.None of the above
A.In symmetrical casting only
B.To make castings sound
C.To get smooth surface on castings
D.To get cavity or recess in a casting
E.To strengthen mould
A.Die-casting
B.Investment casting
C.Centrifugal casting
D.Slush casting
E.Pressed casting
