Rajasthan Polytechnic Third Year Paper 2016 – Design of Dies and Moulds

Rajasthan Polytechnic Third Year Paper 2016 – Design of Dies and Moulds

Internal stresses are developed due to
(a) shrinkage
(b) post-moulding shrinkage
(c) parting line
(d) venting

Sink marks are generated due to
(a) Thick sections
(b) Thin sections
(c) Undercuts
(d) Ribs

Following is not an example of ejector system
(a) Knockout pins
(b) Stripper plate
(c) Compressed air
(d) Undercut

Moulded inserts are used
(a) to decorate the plastic part
(b) to transmit electric current
(c) to carry internal stresses
(d) all of the above

The simplest compression mould is
(a) flash type mould
(b) positive type mould
(c) landed positive mould
(d) semi positive mould

Buttons are made by following mould
(a) single cavity mould
(b) Bi-cavity mould
(c) Multi-cavity mould
(d) None of the above

The best runner among the following is
(a) Full round
(b) Half round
(c) Rectangular
(d) Square

Die for making rod is
(a) Solid extrudate die
(b) Hollow extrudate die
(c) crosshead die
(d) offset die

Blown film is manufactured by
(a) side fed die
(b) centre fed die
(c) both (a) and (b)
(d) None of these

Cross head die among the following is
(a) Die for rods
(b) Die for pipes
(c) Die for blown film
(d) Die for sheet

Which of the following is not gate?
(a) Standard gate
(b) Pinpoint gate
(c) Submarine gate
(d) Cavity

Plastic bottles are made by the following
(a) injection mould
(b) extruder die
(c) blow mould
(d) compression mould