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Latest RPSC Senior Scientific Officer Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject

Question Bank RPSC Senior Scientific Officer (Biology Division) Exam - English
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Concerned Subject

Question 1Single Answer
The primary reason for using a systematic search pattern at a crime scene is?
  1. A
    To save time
  2. B
    To impress the supervisor
  3. C
    To avoid disturbing the scene
  4. D
    To ensure no area is missed and evidence is not overlooked
Question 2Single Answer
Which search pattern is most suitable for large outdoor areas with no obvious focal point?
  1. A
    Spiral search
  2. B
    Grid search
  3. C
    Zone search
  4. D
    Strip/line search
Question 3Single Answer
In a spiral search, the searcher begins from?
  1. A
    The center and moves outward
  2. B
    The outer perimeter and moves inward
  3. C
    One corner only
  4. D
    Random points
Question 4Single Answer
Which search method divides the scene into smaller zones or quadrants?
  1. A
    Strip search
  2. B
    Grid search
  3. C
    Zone/quadrant search
  4. D
    Spiral search
Question 5Single Answer
The most common search pattern used indoors in a room is?
  1. A
    Spiral search
  2. B
    Grid or zone search
  3. C
    Line search
  4. D
    Circular search
Question 6Single Answer
Alternative Light Sources (ALS) are primarily used to detect biological fluids because they?
  1. A
    Chemically react with fluids
  2. B
    Heat the surface
  3. C
    Cause fluorescence or absorption at specific wavelengths
  4. D
    Magnify stains
Question 7Single Answer
The wavelength most commonly used to detect semen stains with ALS is?
  1. A
    532 nm (green)
  2. B
    365 nm (UV)
  3. C
    415-450 nm (blue light)
  4. D
    650 nm (re
Question 8Single Answer
Semen typically fluoresces?
  1. A
    Bright white-blue under blue light (450 nm)
  2. B
    Red under UV
  3. C
    Green under red light
  4. D
    No fluorescence
Question 9Single Answer
Saliva stains under ALS usually show?
  1. A
    Weak yellowish-white fluorescence under UV or blue light
  2. B
    Strong red fluorescence
  3. C
    No fluorescence
  4. D
    Purple glow
Question 10Single Answer
Urine typically fluoresces under ALS as?
  1. A
    Pale yellow or greenish under UV
  2. B
    Bright blue
  3. C
    No fluorescence
  4. D
    Dark red
Question 11Single Answer
Blood absorbs light strongly at which wavelength, appearing dark?
  1. A
    365 nm
  2. B
    532 nm
  3. C
    415 nm (violet-blue)
  4. D
    650 nm
Question 12Single Answer
Which biological fluid does not typically fluoresce strongly under ALS?
  1. A
    Blood
  2. B
    Semen
  3. C
    Saliva
  4. D
    Urine
Question 13Single Answer
The orange filter is used with ALS to?
  1. A
    Block background fluorescence and highlight semen/saliva
  2. B
    Enhance blood visibility
  3. C
    Reduce glare
  4. D
    Change color of stains
Question 14Single Answer
The primary advantage of using ALS over traditional chemical presumptive tests is?
  1. A
    Quantifies DNA
  2. B
    Highly specific
  3. C
    Confirms species
  4. D
    Non-destructive and rapid screening
Question 15Single Answer
Which ALS wavelength is best for detecting latent bloodstains?
  1. A
    415 nm (violet)
  2. B
    450 nm (blue)
  3. C
    532 nm (green)
  4. D
    365 nm (UV)
Question 16Single Answer
The Area of Convergence in BPA is determined by?
  1. A
    Measuring the diameter of circular stains
  2. B
    Tracing back the long axis of elliptical stains
  3. C
    Counting the number of stains
  4. D
    Using chemical tests
Question 17Single Answer
The Area of Origin is calculated by combining?
  1. A
    Area of Convergence and angle of impact
  2. B
    Only width of stain
  3. C
    Only length of stain
  4. D
    Color of stain
Question 18Single Answer
High-velocity spatter is typically produced by?
  1. A
    Gunshot or explosion
  2. B
    Blunt force trauma
  3. C
    Arterial spurting
  4. D
    Dripping
Question 19Single Answer
Low-velocity spatter is characterized by?
  1. A
    Large, round drops (>4 mm) from dripping
  2. B
    Fine mist (<1 mm)
  3. C
    Medium-sized stains
  4. D
    Elongated stains
Question 20Single Answer
Medium-velocity spatter is usually produced by?
  1. A
    Arterial gushing
  2. B
    Gunshot
  3. C
    Blunt force trauma (beating, stabbing)
  4. D
    Free-falling drops
Question 21Single Answer
The shape of a blood drop on a surface indicates?
  1. A
    Species origin
  2. B
    Only velocity
  3. C
    Only volume
  4. D
    Angle of impact
Question 22Single Answer
A circular bloodstain indicates an impact angle of?
  1. A
    90 degree (perpendicular)
  2. B
    10 degree
  3. C
    45 degree
  4. D
    0 degree
Question 23Single Answer
The narrower the ellipse of a bloodstain, the?
  1. A
    Smaller the angle of impact
  2. B
    Larger the angle of impact
  3. C
    Higher the velocity
  4. D
    Lower the velocity
Question 24Single Answer
Cast-off patterns are created by?
  1. A
    Arterial spurting
  2. B
    Dripping blood
  3. C
    Blood flung from a weapon during swing
  4. D
    Expirated blood
Question 25Single Answer
Arterial spurting patterns are characterized by?
  1. A
    Regular, wave-like or zigzag patterns
  2. B
    Random misting
  3. C
    Large round drops
  4. D
    Small circular stains
Question 26Single Answer
Expirated blood patterns typically show?
  1. A
    Large round drops
  2. B
    Small, fine droplets with air bubbles
  3. C
    Elliptical stains only
  4. D
    No bubbles
Question 27Single Answer
Swipe patterns are caused by?
  1. A
    Gunshot
  2. B
    Dripping blood
  3. C
    Contact with a bloodstained object moving across a surface
  4. D
    Arterial gushing
Question 28Single Answer
Wipe patterns occur when?
  1. A
    Blood is flung
  2. B
    A clean object moves through an existing bloodstain
  3. C
    Blood drips
  4. D
    Blood spurts
Question 29Single Answer
The best search pattern for a vehicle interior is?
  1. A
    Spiral search
  2. B
    Zone/quadrant search
  3. C
    Grid search
  4. D
    Line search
Question 30Single Answer
Which fluid fluoresces strongly under 365 nm UV light?
  1. A
    Blood
  2. B
    Urine and semen (weak to moderate)
  3. C
    Saliva only
  4. D
    Sweat
Question 31Single Answer
The green filter is commonly used with?
  1. A
    532 nm green ALS to detect blood
  2. B
    Blue light
  3. C
    UV light
  4. D
    Red light
Question 32Single Answer
The primary limitation of ALS in biological fluid detection is?
  1. A
    Slow process
  2. B
    Destroys DNA
  3. C
    Non-specificity (other substances may fluoresce)
  4. D
    Expensive equipment only
Question 33Single Answer
In BPA, the term "directionality" refers to?
  1. A
    The direction blood was traveling
  2. B
    The volume of blood
  3. C
    The color of blood
  4. D
    The age of blood
Question 34Single Answer
Satellite spatter is produced by?
  1. A
    A large parent drop striking a surface
  2. B
    Arterial spurting
  3. C
    Cast-off
  4. D
    Expirated blood
Question 35Single Answer
The spines or tails on a blood drop indicate?
  1. A
    Species
  2. B
    Velocity only
  3. C
    Age of stain
  4. D
    Direction of travel (towards the tail)
Question 36Single Answer
Which search pattern is used when evidence is in a linear path (e.g., hallway)?
  1. A
    Strip/line search
  2. B
    Spiral
  3. C
    Grid
  4. D
    Zone
Question 37Single Answer
ALS photography requires?
  1. A
    Long exposure and orange filter
  2. B
    Flash only
  3. C
    No filter
  4. D
    Normal light
Question 38Single Answer
The wavelength 450 nm (blue) is optimal for detecting?
  1. A
    Urine only
  2. B
    Blood only
  3. C
    Semen and saliva
  4. D
    Sweat
Question 39Single Answer
In outdoor scenes, the most effective search pattern for large areas is?
  1. A
    Grid search with multiple searchers
  2. B
    Spiral search
  3. C
    Zone search
  4. D
    Random search
Question 40Single Answer
Backspatter is blood projected?
  1. A
    Sideways
  2. B
    Forward only
  3. C
    Backward toward the firearm in gunshot wounds
  4. D
    Downward
Question 41Single Answer
Flow patterns in blood indicate?
  1. A
    Impact angle
  2. B
    Velocity
  3. C
    Gravity direction and surface texture
  4. D
    Origin
Question 42Single Answer
The most reliable presumptive test for blood after ALS is?
  1. A
    Luminol or Bluestar
  2. B
    All of the above
  3. C
    Tetramethylbenzidine (TMB)
  4. D
    KM (Kastle-Meyer)
Question 43Single Answer
Which ALS wavelength is used for latent fingerprints?
  1. A
    532 nm green
  2. B
    365 nm UV or 450 nm blue
  3. C
    650 nm red
  4. D
    Infrared
Question 44Single Answer
The "string method" in BPA is used to determine?
  1. A
    Volume
  2. B
    Velocity
  3. C
    Area of Convergence
  4. D
    Age
Question 45Single Answer
Which fluid shows strong fluorescence under 415-450 nm but weak under UV?
  1. A
    Semen
  2. B
    Blood
  3. C
    Urine
  4. D
    Saliva
Question 46Single Answer
The primary goal of ALS screening is?
  1. A
    Locate potential biological stains for further testing
  2. B
    Confirm species
  3. C
    Quantify DNA
  4. D
    Determine age of stain
Question 47Single Answer
In BPA, the number of spines on a blood drop increases with?
  1. A
    Higher velocity impact
  2. B
    Lower velocity
  3. C
    Perpendicular impact
  4. D
    Horizontal surface
Question 48Single Answer
The search pattern that starts from the perimeter and moves inward is called?
  1. A
    Outward spiral
  2. B
    Inward spiral
  3. C
    Grid
  4. D
    Zone
Question 49Single Answer
ALS can detect semen stains on dark fabrics by?
  1. A
    Using chemical spray only
  2. B
    Using red light
  3. C
    Using no light
  4. D
    Using 450 nm light and orange goggles
Question 50Single Answer
The most common mistake in ALS use is?
  1. A
    Using too much light
  2. B
    not using the correct filter/goggle combination
  3. C
    Using UV only
  4. D
    not wearing gloves
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