Rajasthan Polytechnic Third Year Paper 2016 – Offset Litho Machining

Rajasthan Polytechnic Third Year Paper 2016 – Offset Litho Machining

Role of Dampening Roller
(a) to moisturise the plate
(b) inking on the plate
(c) clean the plate
(d) All of these

Role of sheet detector
(a) Sheet control
(b) Water control
(c) Both of the above
(d) None of these

Which device is used for preventing set-off?
(a) Blanket Roller
(b) Dampener Roller
(c) Anti set-off device
(d) None of these

Inking the plate done by which roller?
(a) Dampener Roller
(b) Oscillator Roller
(c) Plate Roller
(d) Distribution Roller

Which unit print both side of paper?
(a) Satellite unit
(b) Three cylinder unit
(c) Both of above
(d) Blanket to Blanket unit

Four colour printing also known as
(a) Wet on wet printing
(b) Perfect printing
(c) Three cylinder printing
(d) None of these

The use of three colour transfer system in which printing machine ?
(a) Single colour printing machine
(b) Multicolour printing machine
(c) Letter Press machine
(d) None of these

Which type of ink use in offset printing machine?
(a) Gravure ink
(b) Process ink
(c) Non – process ink
(d) None of these

pH of foundation solution for printing is
(a) 3 to 4
(b) 4 to 4.5
(c) 4.5 to 5.5
(d) 5 to 5.5

Ideal temperature of Press Room
(a) 11 to 16 Degree Celcius
(b) 18 to 25 degree Celcius
(c) 25 to 30 degree Celcius
(d) None of these

The temperature of Fountain Solution is
(a) 6 to 8 degree Celcius
(b) 11 to 12 degree Celcius
(c) 9 to 10 degree Celcius
(d) 12 to 14 degree Celcius

Relative humidity of press room will be
(a) 35 to 45%
(b) 45 to 50%
(c) 55 to 60%
(d) 40 to 60%