In spot welding, the spacing between two spot weld should not be less than _______________?
(A) d
(B) 1.5d
(C) 3d
(D) 6d
Lancing is the operation of _________________?
(A) cutting a sheet of metal through part of its length and then bending the cut portion
(B) removal of metal to the desired shape from the edge of a plate
(C) cutting a sheet of metal in a straight line along the length
(D) bending a sheet of metal along a curved axis
The cold working of metals is carried out_________________?
(A) below the recrystallisation temperature
(B) at the recrystallisation temperature
(C) at any temperature
(D) above the recrystallisation temperature
A neutral flame is obtained by supplying___________________?
(A) more volume of acetylene and less volume of oxygen
(B) equal volumes of oxygen and acetylene
(C) more volume of oxygen and less volume of acetylene
(D) none of the above
In a _____________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram?
(A) progressive die
(B) simple die
(C) compound die
(D) combination die
When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?
(A) horizontal
(B) nearly horizontal
(C) steep
(D) first rise and then fall
(D) none of the above
The efficiency of a centrifugal pump is maximum when its blades are__________________?
(A) straight
(B) bent forward
(C) bent backward
(D) bent forward first and then backward
(D) bent backward first and then forward
Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
(A) high initial and maintenance cost
(B) lower discharge
(C) lower speed of operation
(D) necessity of air vessel
(D) all of the above
In a centrifugal pump casing, the flow of water leaving the_______________?
(A) radial
(B) radial
(C) centrifugal
(D) rectilinear
(D) vortex
Head developed by a centrifugal pump depends on___________________?
(A) impeller diameter
(B) speed
(C) fluid density
(D) type of casing