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mechanism operating on the upstroke of a press, which ejects workpiece on

blanks from a press tool.

(A) Cushion (B)
(൭ Ram (D)
Pilots are heat treated to a hardness of HRC
(A) 57-60 (B)
(൭ 100-130 (D)

Bolster plate
Knockout

20-25
90-93

In a progressive die, the tonnage of a press can be reduced by

(A) Increasing hardness of the die (B)
(C) Grinding the cutting edges (D)

A moving mandrel is used in
(A) Wire drawing (B)
(C) Centrifugal casting (D)

In blanking the clearance provided is
(A) 50% on punch and die (B)
(C) On punch (D)

Metal extrusion is generally used for producing
(A) Uniform solid section (B)
(C) Uniform hollow and solid section (D)

Increasing punch hardness
Staggering the punches

Tube drawing
Nibbling

25% on punch and 75% on die
On die

Uniform hollow section
Varying section

Blanking and punching operations can be performed simultaneously on

(A) Combination die (B) Compound die
(C) Progressive die (D) Simple die
The rivet hole diameter for a rivet having diameter 14 is
(A) 14.2 (B) 14.5
(൭ 15 (D) 15.5
Injection moulding is a process used for processing
(A) Aluminium (B) Nickel
(C) Steel (2) Plastics
Thermoplasts are joined by process called
(A) USW (B) SAW
(൭ FW (D) LBW
In cold chamber diecasting process only non-ferrous alloys with melting point
are cast.
(^) low (B) medium
(൭ high (D) all
The bottles from thermoplastic materials are made by
(A) Compression moulding (B) Extrusion
(C) Injection moulding (D) Blow moulding
ലല 005/2021

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