Questioned Documents MCQ's (Part-9)

Questioned Documents MCQ's

Q1. The first photocopier machine was patented by:

A) Sir Louis Pasteur

B) Sir Chester Carlson

C) Sir Frances Gabe

D) Sir George Beers

Answer: Sir Chester Carlson

Explanation: A photocopier machine formerly known as xerox machine is a machine that makes copies of document and other visual images onto paper or plastic film quickly and cheaply.Chester Carlson invented photocopier and patented in 1938 and he made the first photocopy using zinc plate covered with sulfur.

Q2. Photocopy machine work on:

A) Electrostatic effect

B) Magnetic effect

C) Thermal effect of electric current

D) Seedback effect

Answer: Electrostatic effect

Explanation: Photocopies work on the principle that ‘opposites attract’.The toner powder is negatively charged and is attracted to something positive- the paper.The drum ,which is located in the heart of a photocopier,which is positively charged using static electricity.An image of the master copy is transferred onto the drum is transferred to a piece of paper,which has a higher negative charge than the drum.The toner is melted and bonded to the paper using heat and pressure rollers.

Q3. What is the ink composition of black and white color photocopier machine?

A) Lead oxide

B) Zinc sulfate

C) Carbon black and titanium dioxide

D) Antimony

Answer: Carbon black and titanium dioxide

Explanation: Ink is composed of solvents,pigment,dye,resins,lubricants,solubilizers,surfactants, particulate matter,fluorescence and other materials.Titanium dioxide is the inorganic compound when insoluble in water,its mineral forms appears black.

Q4. Photocopied document can be connected specifically with a photocopier with the analysis of:

A) Toner analysis and defect marks on the drum

B) Defect marks present on the drum of photocopier

C) Only toner used in photocopier

D) The font type used to prepare the document

Answer: Toner analysis and defect marks on the drum

Q5. The CMYK spectrum is often referred as:

A) Black and White photocopy

B) Color photocopy

C) Digital technology

D) All Of the above

Answer: Color photocopy

Explanation: The CMYK spectrum is referred in color photocopier which is a reproduction of an image or text in color.Basic color photocopier will have four drums and four toner reservoir,or cartridges,containing the color cyan,magenta,yellow and black- sometimes referred to as CMYK spectrum.Using these four color photocopier are able to create almost any color combination.

Q6. Defects that are produced by a photocopier onto a copied document may originate from defects in all of the following photocopier parts except:

A) Glass plate

B) Feed tray

C) Inner cover

D) Mechanical portions

Answer: Feed tray

Explanation: The paper feed/Feed tray is a rubber piece that takes a sheet of paper from the paper cassette and sends it into the printer system,beginning with the registration rollers.

Q7. Fax machine print a header at the top of each fax page that may become a very important point of comparison.What is the header called:

A) End to end header

B) Hop by hop header

C) TTI ( Transmission Time Interval)

D) Proxy authorization header

Answer: TTI ( Transmission Time Interval)

Explanation: The TTI is typically found in the heading of any transmitted document.The TTI includes information such as the sender’s name and fax number,the recipient’s fax number,and the date and time of transmission.Fax machine are susceptible to manufacturer's defect or defect acquired through overuse or abuse.These defects may occur in the source machine ,the recipient machine,or both and must be differentiated from the noise that may occur during transmission.

Q8. The sequence of pages in the multipage laser-printed document could be determined from the position of which type of defect marks.

A) Residual toner impression

B) Glass platen defect marks

C) Drum defect marks

D) Roller defect marks

Answer: Drum defect marks

Explanation: Laser printing is an electrostatic digital printing process.It produces high quality text and process.It produces high quality text and graphics by passing a laser beam back and forth over a negatively charged cylinder called a “drum” to define a charged image.Sequencing of the pages had also been determined from the distance between two drum defect marks present on two consecutive pages.

Q9. Ink writing erased with chemical erasure may be deciphered with the help of which of the following?

A) Stereo-microscope

B) VSC

C) ESDA

D) Comparison microscope

Answer: VSC

Explanation: Chemical erasure is a process of bleaching the color of ink by converting colored compounds into colorless compounds.The ink itself remains in the paper in invisible form.Examination of invisible ink can be done by using UV rays,and a more advanced technique used in detention is VSC.When a portion of the document has been altered and some portions is not clearly visible VSC can be used to decipher the alteration.

Q10. The other word for ‘photography’ or ‘xerography’ is:

A) Cryptography

B) Reprography

C) Orthography

D) Stenography

Answer: Reprography

Explanation: Reprography is the process of reproducing graphics through electrical or mechanical means such as photography or xerography.The reproduction and duplication of documents,written ,materials,drawings,designs by any process making use of light rays or photographic means,including offset printing.

Author:- Tashi Bhargawa