Rajasthan Polytechnic Third Year Paper 2016 – Printing Science

Rajasthan Polytechnic Third Year Paper 2016 – Printing Science

Commonly type alloy is the combinatin of metals
(a) Pb, Cu & Sb
(b) Pb, Sn & Cu
(c) Cu, Sn & Sb
(d) Pb, Sn & Sb

Why copper is added to type alloy?
(a) Smoothness
(b) Hardness
(c) Softness
(d) None

Quantity of metals in monotype alloy is
(a) 6% Sn 15% Sb & 79% Pb
(b) 8% Sn 20% Sb & 72% Pb
(c) 10% Sn 30% Sb & 60% Pb
(d) 7% Sn 13% Sb & 80% Pb

Grain direction is related to
(a) Film
(b) Bromide paper
(c) Paper
(d) None

Use of air coolers in printing room can lower the temperature but can
(a) Increase R.H
(b) Maintain R.H
(c) Reduce R.H
(d) None of the above

Before printing seasoning of paper is necessary otherwise it
(a) Deteriorate printing quality
(b) Good printing quality
(c) Increase R.H
(d) None

GSM is related to
(a) Film
(b) Plate
(c) Paper
(d) Screen

Eutectic alloy is for casting the type
(a) Suitable
(b) Unsuitable
(c) Requre more temperature to melt
(d) None

Melting point of lead (Pb) is
(a) 327 degree Celcius
(b) 252 degree Celcius
(c) 320 degree Celcius
(d) 375 degree Celcius

Unit of measurement of viscosity of ink is
(a) Ponds
(b) Poise
(c) Kilogram
(d) None

What is the role of pigments in ink?
(a) Dry
(b) Viscosity
(c) Colour
(d) None

Viscosity of ink play a vital role in
(a) Half tone
(b) Reflection
(c) Good printing
(d) Solution making

In what form the pigments are available ?
(a) Solid
(b) Solution
(c) Powder
(d) None

What is the role of vehicles in ink?
(a) Dry
(b) Viscosity
(c) Solvent
(d) None

What is the role of Cobalt in ink?
(a) Solvent
(b) Drier
(c) Tackiness
(d) None