This document provides information about OMR sheets, including what they are, how they are designed and scanned, and instructions for filling them out correctly. It describes the basics of OMR sheets, how they are used for objective exams, and software like AutoCAD used to design them. It also outlines different types of OMR sheets, security features, the scanning process, and important guidelines for test-takers around properly filling bubbles and avoiding errors.

1. ABOUT THE BOOK
The idea about the book is to give the knowledge regarding the OMR Sheet. Its concept and
basics and types.
The book tells also tells about the designing, scanning and the instructions how a person should
fill their details in the OMR Sheet so that the result of any of candidate is not affected by the
improper filling of the sheet.
This book will help the readers to know about the sensitivity and accuracy of the OMR Sheet.
This book is very beneficial for students who are going to give any kind of competitive exams.
Hope you reading the book.
To your success,
NITISH CHANDRA
(AUTHOR)

2. ABOUT THE AUTHOR
I am Nitish Chandra a Web Developer and Digital Marketer work as a freelance consultant and
Founder of Vindhya Process Solutions. Have done B.E. in (Computer Technology) from Nagpur
University and Masters in Digital Marketing.
Have successfully developed various websites and have also published many Advertisements of
various industries like travel, education, selling parrots and bulldogs on Google and Social
Media Platforms.
I have also have been in the field of Competitive Examinations where OMR related works are
involved has himself designed various types of OMR Sheets and prepared results for various
organsiations like UPSC,BSF, CBSE and State and Central Universities.
To know more, visit
www.vindyaprocess.com
www.dotconfiscan.in

3. OPTICAL MARK READER
OPTICAL MARK READER SHEET (OMR SHEET) is a technically designed sheet which is used in
objective type examinations or any other data which has multiple choice options to be filled by
the applicant. It is designed with circles/ovals and rectangles. The circles/ovals are generally in
Pink/Magenta and Orange Colour. The rectangles are in black colour.
The OMR sheets are scanned through specific OMR Scanners which are provided by various
companies like Scantron, DRS, Sekonic,etc. The best scanner in my opinion are of Scantron
OpScan scanners they are of various like 2,4,6,8,10, 21, etc. These scanners are designed
technically with header to read the responses filled in OMR sheets. The headers can be ink or
pencil head with accuracy of OMR Sheets. The ink head has facility to scan responses filled with
pencil and pen both whereas, pencil headers have facility to scan responses filled with pencil
only. The accuracy is 99.99% on the OMR Scanners.
The picking of response depends on the threshold value i.e. the intensity of filling the responses
in OMR Sheet. If a person just put a dot(.) or a tick () on the sheet the response may not be
picked. The bubbles should be dark and filled so that the circles/ovals in the completely. If a
person fills more than two responses in one field the data will be read as * (multiple responses).
Design of OMR Sheet - There are specific dimensions of designing OMR Sheet with 0.05 mm
precision on scale. If the dimensions are not up to the precision scale the accuracy of OMR
sheet may vary. So it is advisable that the sheet should be designed and printed with perfection
and the cutting of the sheet should be perfect as shown here.
Software to design OMR Sheet – Architects and builders use Autocad Software for designing
designs and architecture, the same software, Autocad is used in designed OMR Sheet which has
full and accurate dimensions. Corel Draw is designing software which is used after final
designing is done in Autocad to get the better look with colour and print to file features of OMR
Sheet.

4. Types of OMR Sheet
1. Single Part – Sheets are printed on 105 gsm to 120 gsm paper on A4/Legal sheet.
2. Double Part (Carbonless) – Two Sheets are printed one 105 gsm paper and one on 60-70 gsm
paper on A4 sheet . The bottom of first sheet and the top of second sheet is chemically treated
so that the impression of the first sheet should come on the second sheet.
3. Three Part (Carbonless) – Three Sheets are printed one 105 gsm paper and other two on 60-70
gsm paper on A4 sheet . The bottom of first sheet, the top and bottom of second sheet and the
top of third sheet is chemically treated so that the impression of the first sheet should come on
the second and third sheets.
First Copy Second and Third Copy
Security Features in OMR Sheet
1. Bar Code – Unique Code is printed on the sheets so that no tampering of sheets can be done
2. UV Printing – Watermark or any other text or logo printed on the sheet which cannot be seen by
the naked eye.
3. Litho Code - Unique Code is printed on the sheets in the form of binary coding so that no
tampering of sheets can be done.
How is Scanning done and how can get the result/output of OMR sheets – Scanning is done by OMR
scanners specifically designed for OMR Sheets. The reading of data is done through the header fitted in
the OMR scanners to read the marks filled by pen/pencil. Only Blue/Black Ball Pont Pen should be used
to get the proper and accurate responses if filled by correct method. The sheets are kept in a bunch of

5. 200-250 in the input hopper of the scanner and then scanned through Scan tools software or any other
software with the facility of printing of scan numbers on the sheet to identify the sheet for future
reference.
The sheets are scanned in .dat format and then is converted into .dbf format and then through
programming further processing, result or output are done.
What measures should to be taken to fill OMR Sheet
a) There are timing marks or skunk marks on the side and four IDs on the top and bottom of OMR
Sheet through which data is captured through OMR Scanners. These should not be tampered at
any cost otherwise sheet while scanning can be rejected.
b) The barcodes or litho codes should not be tampered at any cost because that may give error
while scanning of barcodes and litho codes.
c) The sheets before and after the examination should be packed nicely in tamper proof poly packs
or envelopes so that they are not torn or mutilated to get error free result or output.
INSTRUCTIONS TO FILL OMR SHEET
1. Use Black or Blue Ball Point Pen only. Please avoid using gel pens, fountain pens and any other
colour pens.
2. Unless specified don’t use pencils and if asked then only use HB Pencil.
3. Darken the bubbles completely. A tick mark, a dot of half filled bubbles will not be read and
scanned. As shown below :
CORRECT METHOD WRONG METHODS
A CC D A B AD B C BD A C D A B C D
4. Never use white fluid or cutting for rectifying errors as they may disrupt the scanning and
evaluation process.
5. Do not fold the OMR Sheet.
6. Do not any stay marks on the OMR sheet.
7. Multiple marking are invalid they may result in rejection.
THANK YOU