Name of the University : Jadavpur University
Department : Printing Engineering
Degree : B.E
Subject Code/Name : Printing Machines
Sem : II
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5379-B.%20Printing%20-%20Printing%20Machines.pdf
Printing Machines Question Paper :
B.Printing Engg.Final Examination 2008 : (Supplementary)
2nd Semester :
Printing Machines :
Related : Jadavpur University Non-Impact Printing B.E Question Paper : www.pdfquestion.in/5376.html
Time: Three hours
Full Marks: 100
Answer any Five questions :
1. a) In any sheetfed offset press the bevel edge of the depression gap of the plate cylinder carrying the leading plate edge is designed to coincide with the blanket cylinder depression slightly in advance. Why?
b) Discuss in brief the plate and blanket clamping mechanisms used in sheetfed offset press.
c) Discuss in brief the merits and demerits of the contact bearer type of sheetfed offset press over the non-contact bearer type of sheet fed offset press. 2+8+10=20
2. a) What are the basic features of an inking system used in sheet fed offset press?
b) Discuss in brief how the supply of ink is controlled in sheet fed offset press.
c ) Discuss in brief the different types of ink rollers pyramids used in sheet fed offset press. 5+7+8’=20
3. a) Discuss with neat sketch how the sheet is transferred between multi-station of a multicolor sheet fed offset press without disturbing the registration.
b) Discuss in brief the different types of intermediate sheet transport devices used in sheet fed offset presses. 10+10=20
4. Discuss in brief the any two types of sheet insertion systems used in sheet fed offset presses. ‘ 10+10=20
5. a) What are the basic differences between single sheet feeder and streamline sheet feeder?
b) All the stream feeder are designed to prevent and discourage the feeding of double sheets. How?
c) Discuss how the sheet control devices guide the sheets on the feed table in stream feeder of thesheet fed offset press. 8+5+7=20
6. a) What are the adjustment provisions the front lays have?
b) Discuss in brief about the different types of pull type side lays used in sheet fed offset press.
c) What are the limitations of the push type side lays? 5+10+5=20
7. Discuss the different control devices used in the delivery bay of the sheet fed offset press to deliver the sheet without marking the previous one. 20
8. a) What do you mean by perfecting in terms of printing?
b) What are the different types of perfecting press used in sheet fed offset. Are they perfecting press in true sense?
c) Discuss with neat sketch the Convertible type of perfecting press used in sheet fed offset. 3+3+2+12=20
Syllabus :
Printing Machine Design :
Basic idea of machine design, analysis, itemization, empericism, approximation and synthesis, design decision. Permanent and detachable fastening devices, bolts, nuts, screw, keys, pin and retainers, their types and appropriate applications.
Threaded joints, types and causes of threaded failures; Bolts without and with preloading; joints using gaskets.
Torque transmitting elements : Shaft couplings, pulleys – their types and design features. Kinematic analysis of spur and bevel gears, worms and worm wheels. Specification and selection of bearings. Simple structure and foundation equipment.
Basic idea of design & analysis, Concepts of fits & tolerances, design of typical machine elements, Design & drawing of gear box, worm, worm wheel, stop-valve, journal bearing, clutch, etc. Design aspects of sheetfed offset and web offset printing machines