RPSC Senior Scientific Officer Documents Paper 2019 Part B- Forensic Science
Total Questions – 100 Duration – Two hours
Part B- Forensic Science – 40 Questions
Electrostatic Detection Apparatus (ESDA) cannot be used for problems involving
(a) Decipherment of Writing Impressins
(b) Ink-dating
(c) Detection of indented writing
(d) Differentiation in dielectric properties of paper
Which is the most common and economical method which can be used to detect and decipher indented writings on paper surface?
(a) Incident Light Examination
(b) U.V. Fluorescence
(c) Oblique Light Examination
(d) Transmitted Light Examination
Subsequent writing, on the erased surface, with a fluid ink may result in
(a) Spreading and Feathering of Ink
(b) Gooping and Blobbing of Ink
(c) Thinning of Paper
(d) Obliteration of Document
Evaluate the Assertion (A) and Resaon (R) and select the correct answer from the given codes
Assertion (A) – As the Rhodamine-B in ball point pen ink degrades, it loses the Ethyl groups.
Reason (R) – The Ethyl groups are replaced by the Hydrogen atoms
(a) (A) is true, but (R) is false
(b) Both (A) and (R) are true
(c) Both (A) and (R) are false
(d) (A) is false, but (R) is true.
Select the solvent system that is most suitable for Thin Layer Chromatography (TLC) of blue ball point pen inks
(a) Ethanol : Acetone : Acetic Acid (4:1:5)
(b) Amyl Alcohol: Acetic Acid: Pyridine (6:1:2)
(c) Ethyl Acetate: Ethanol: Water (7:3.5:3)
(d) Amyl Alcohol: Acetic Acid: Chloroform (6:1:2)
Which of the following statements NOT TRUE?
(a) The influence of alcohol or durgs may cause variation in handwriting of a person
(b) The handwriting of an individual remains unaffected with the advacing age.
(c) The handwriting of a person always shows natural variations
(d) An individual’s handwriting may vary as a result of stress or illness.
Two inks similar in shade but with different composition can be distinguished by
(a) Transmitted Light Examination
(b) Stereomicroscopic Examination
(c) Infra Red Luminescence
(d) U.V. Fluorescence
Select the property of paper, from the given codes, which is not relevant to material used for the preparation of handwritten documents
(a) Paper thickness and weight (GSM)
(b) Tensile Strength
(c) Acid resistant
(d) Ink repellency
Evaluate the Assertion (A) and the Reason (R) and select the correct answer from the given codes
Assertion (A) – Exact superimposition of two or more signatures is a sure indication of traced forgery.
Reason (R) – Since the signatures were produced by tracing process, usual symptoms of forgery and line quality defects cannot be found in them
Codes –
(a) Both (A) and (R) are correct.
(b) Both (A) and (R) are incorrect
(c) (A) is correct, but (R) is incorrect.
(d) (A) is incorrect, but (R) is correct.
A charred document becomes completely black at a temperature of
(a) 90 degree celcius
(b) 400 degree celcius
(c) 250 degree celcius
(d) 280 degree celcius
Leave a Reply