W201 Day 3–Overnight Questions with Answers

ASBESTOS

  1. Fill in the blanks in the table below which lists the three main types of asbestos.

Common Name / Proper name / Group
White asbestos / Chrysotile / Serpentine
Brown Asbestos / Amosite / Amphibole
Blue Asbestos / Crocidolite / Amphibole
  1. What are main health effectsassociated with asbestos exposure?
  • Asbestosis
  • Cancer of the bronchus and lung
  • Mesothelioma

BIOLOGICAL HAZARDS

  1. Name the three main categories of biological agents
  • Bacteria
  • Viruses
  • Fungi
  1. For each of the agents below indicate where the source of exposure might occur.

Agent / Source of exposure
Hepatitis / Human Body fluids
HIV / Human Body fluids
Legionella / Water supplies
Anthrax / Cattle,horses, goats and sheep
Leptospira / Rats
Salmonella / Food

Noise

  1. On the diagram indicate which parts are:
  • Auditory canal
  • Cochlea
  • Cochlear nerve
  • Malleus
  • Eustachian Tube

  1. What is the total noise level likely to be encountered under the following situations?

Precise answer = 90.054 decibels however numbers are rounded to whole numbers

  1. Which of the dotted lines (A, B,C or D) represents the Equivalent Continuous Sound Level (Leq)

Answer = C Log scale means there is a bias towards the higher numbers.

VIBRATION

  1. Which of the following has the correct units for measuring vibration
  2. m/s
  3. m/s-2
  4. m/s2 Correct
  5. m/s3
  1. What are the symptoms associated with Vibration White Finger
  • Attacks of whitening (blanching) of one or more fingers when exposed to cold.
  • Tingling and loss of sensation in the fingers.
  • Loss of light touch.
  • Pain and cold sensations between periodic white finger attacks.
  • Loss of grip strength.
  1. Give three work activities which can give rise to high levels of hand arm vibration.
  • Stone masons usingpneumatic and electric hand tools
  • Forestry work using chain saws
  • Woodworking using sanding machines
  1. Give three work activities which can give rise to high levels of whole body vibration.
  • Mining, operating large scale plant such as drills
  • Transportation, driving over bumpy surfaces
  • Agriculture, driving tractors

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