SECTION 5 - SAFETY

SECTION คำชี้แจง
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1. 5.51 What does an explosimeter (explosion meter) measure?
    a. The amount of oxygen in a space
    b. Whether a space is safe for entry
    c. Whether or not there is an explosive atmosphere in a space
    d. The flash point of a gas mixture.
2. 5.38 A SDS will list what type of protective equipment is required when working with a particular material.
    a. True
    b. False


3. 5.19 What does H2S stand for?
    a. Water
    b. Hydrogen
    c. Hydrogen sulfide
    d. Dihydrosodium
4. 5.54 What is the normal oxygen content of the air?
    a. 15.1%
    b. 19.1%
    c. 20.9%
    d. 25.9%
5. 5.13 What information must GHS sample labels contain?
    a. Hazard pictograms, signal words and hazard statements
    b. Product name and precautionary statements
    c. Information in both a. and b. above
    d. Information in a. and b. above and supplier information, including a telephone number
6. 5.81 What is the maximum permissible 8 hour TWA (time weighted average) exposure level of H2S?
    a. 30 ppm (60 ppm in USA)
    b. 25 ppm (50 ppm in USA)
    c. 15 ppm (20 ppm in USA)
    d. 5 ppm (10 ppm in USA)
7. 5.29 What should you do to avoid the build-up and/or discharge of static electricity when using a portable electronic thermometer (PET)?
    a. Hold on to the railing or other metal part of the tank while using the PET
    b. Attach the ground wire of the PET to the tank before opening the gauge hatch then slowly lower the probe assembly into the oil
    c. Since the probe is plastic and does not conduct electricity, no static electricity can form
    d. Either a., b. or c. is acceptable
8. 5.12 All samples which are transported between terminals and laboratories or other installations should be labelled in accordance with the globally harmonised system for classification and labelling of chemicals (GHS).
    a. True
    b. False


9. 5.85 When working you must always wear a H2S monitor.
    a. True
    b. False


10. 5.31 What is the main component of inert gas normally used on special chemical vessels?
    a. Nitrogen
    b. Carbon dioxide
    c. Carbon monoxide
    d. Hydrogen
11. 5.73 When working in an environment suspected of containing H2S what is the only effective protection?
    a. Full face respirator
    b. Half mask respirator
    c. Self-contained breathing apparatus (SCBA)
    d. Answers a., b. and c. are all correct
12. 5.08 Which of the following safety equipment is not required on every job?
    a. H2S monitor
    b. SCBA
    c. Hard hat, safety footwear, gloves
    d. Long-sleeve, fire resistant clothing
13. 5.82 What is the short term exposure limit (STEL) for hydrogen sulfide?
    a. 15 ppm (30 ppm in USA)
    b. 10 ppm (20ppm in USA)
    c. 25 ppm (50 ppm in USA)
    d. 30 ppm (60 ppm in USA)
14. 5.79 Which of the following exposure limits for H2S (for use with respirators) are correct?
    a. 500 ppm maximum exposure when using a full face respirator
    b. 100 ppm maximum exposure when using a half-mask respirator
    c. A self contained breathing apparatus must be used if the exposure exceeds 500 ppm
    d. Only a self contained breathing apparatus is permissible for any exposure above the permissible exposure limit
15. 5.37 Who can supply an SDS?
    a. The manufacturer of the material
    b. The seller of the material
    c. The distributor of the material
    d. Answers a., b. and c. are all correct
16. 5.75 Organic filter respirators are sufficiently effective in a hydrogen sulphide atmosphere to be used for escape purposes.
    a. True
    b. False


17. 5.48 What do the initials LEL stand for?
    a. Low explosion location
    b. Low environmental levels
    c. Lower environmental level
    Lower explosive limit
18. 5.56 What is the current exposure limit for benzene (8 hour time weighted average)?
    a. 10 ppm
    b. 3 ppm
    c. 5 ppm
    d. 1 ppm
19. 5.43 What defines a confined space?
    a. It has limited means of access and exit
    b. It is not designed for continuous occupation
    c. It has limited natural ventilation
    d. Answers a., b. and c. are all correct
20. 5.65 What is the permissible exposure limit for benzene (8 hour time weighted average)?
    a. 10 ppm
    b. 3 ppm
    c. 5 ppm
    d. 1 ppm
21. 5.45 According to the International Safety Guide for Oil Tankers and Terminals (ISGOTT), for a tank to be safe for entry, what should the reading on a combustible gas detector be?
    a. Less than 15%
    b. Less than 10%
    c. Less than 1%
    d. Less than 0.5%
22. 5.04 What is the minimum personal protective equipment required when sampling?
    a. Gloves, respirator, hard hat and SCBA
    b. Gloves, eye protection, hard-hat, flame retardant uniform & safety shoes
    c. Gloves, face-shield and sun glasses
    d. Gloves, uniform and SCBA
23. 5.63 Can gasoline contain benzene?
    a. Yes
    b. No


24. 5.42 Products have defined limits of combustion. What are these?
    a. The Permissible Exposure Limit and the Threshold Limit Value
    b. The Lower Explosive Limit, Upper Explosive Limit and the Flash Point
    c. The Flash Point and the Threshold Limit Value
    d. The Permissible Exposure Limit and the Lower Explosive Limit
25. 5.72 What is the most hazardous component of many crude oils?
    a. Benzene
    b. Toluene
    c. Xylene
    d. Hydrogen sulfide
26. 5.66 What is the appearance and characteristic odour of benzene?
    a. Clear colourless liquid with a sweet odour
    b. Clear colourless liquid with a sour odour
    c. Light brown liquid with no distinguishable odour
    d. Light brown liquid with a strong pungent odour
27. 5.68 How heavy are benzene vapours?
    a. Lighter than air
    b. Heavier than air
    c. Same as air
    d. Answers a., b. and c. are all wrong
28. 5.18 A hard hat s most important feature, when worn, is the distance between the shell and the wearer s head.
    a. True
    b. False


29. 5.84 What type of respirator filter cartridges should you use for protection against hydrogen sulfide?
    a. Acid Gas
    b. None. Only a self contained breathing apparatus is acceptable
    c. Organic Vapour
    d. Radionucleides, highly toxic dusts, mists and fumes
30. 5.02 Regardless of the product, and in accordance with IP475/ISO 3170, what is the absolute maximum level to which sample containers must be filled?
    a. 50%
    b. 80%
    c. 95%
    d. 100%
31. 5.49 If the atmosphere in a cargo tank is stated to be below the LEL what does this mean?
    a. There is not enough oxygen in the tank to support combustion
    b. There is too much hydrocarbon vapor in the tank to support combustion
    c. Answers a. and b. are correct
    d. There is not enough hydrocarbon vapor in the tank to permit combustion.
32. 5.23 While sampling a crude ship, the fire alarm sounds. What action should be taken?
    a. Grab a type C fire extinguisher and assist the crew
    b. Close the hatch and call for the launch
    c. Continue sampling because the crew will take care of the fire
    d. Immediately secure your area and report to the muster point
33. 5.32 Why should pumping be suspended when first-in or first-foot samples are taken?
    a. To allow any gas to dissipate
    b. To allow static electricity to dissipate
    c. So the vapours don t blow in your face
    d. To give time for analysis results
34. 5.58 The appearance and characteristic odor of benzene is?
    a. Clear colorless liquid with a sweet odor
    b. Clear colorless liquid with a sour odor
    c. Light brown liquid with no distinguishable odor
    d. Light brown liquid with a strong pungent odor
35. 5.07 When are inspectors permitted to operate valves on board vessels?
    a. When accompanied by an authorised person on board
    b. When no-one else is around to do it
    c. When the vessel staff are too busy to do it themselves
    d. Inspectors must not operate vessel valves
36. 5.80 Refineries are not the only sources of industrial hydrogen sulfide (H2S). Which of the following are other sources?
    a. Pulp Mills
    b. Any agricultural facility where decay of organic matter may occur
    c. Drilling Rigs
    d. Answers a., b. and c. are all correct
37. 5.47 Someone must always stand watch at the entrance to the confined space while you are in it.
    a. True
    b. False


38. 5.03 Regardless of the product, and in accordance with API Ch 8.1/ASTM D4057, what is the maximum level to which sample containers should normally be filled?
    a. 50%
    b. 80%
    c. 85%
    d. 100%
39. 5.67 What effects may result from chronic exposure (long term) to benzene?
    a. Loss of vision
    b. Various blood disorders ranging from anemia to leukemia
    c. Impaired Disability Syndrome (IDS)
    d. Answers a., b. and c. are all correct
40. 5.36 What is the most informative source of information about the hazards of a product or chemical?
    a. The job sheet
    b. The Bill of Lading
    c. The Safety Data Sheet
    d. The operations supervisor
41. 5.59 How can benzene enter your body?
    a. By inhalation
    b. By absorption through the skin
    c. By Ingestion
    d. Answers a., b. and c. are all correct
42. 5.17 A chemical has a strong odour. What does this indicate?
    a. That a hazard exists
    b. That the vapour concentration is low
    c. That the vapour concentration is high
    d. Odour is an unreliable source of specific information regarding a chemical
43. 5.33 Shipping declaration forms are required whenever a hazardous material is transported on a public road or highway.
    a. True
    b. False


44. 5.64 Workers who are regularly exposed to benzene should have a regular medical examination.
    a. True
    b. False


45. 5.30 What is the main component of inert gas used on crude oil vessels?
    a. Carbon sulfide
    b. Carbon dioxide
    c. Oxygen
    d. Hydrogen
46. 5.28 Why is it important to wear gloves while sampling?
    a. So that the sample is not contaminated
    b. To prevent your hands becoming dirty
    c. To prevent hazardous substances being absorbed through the skin
    d. Answers a., b. and c. are all correct
47. 5.39 When does a confined space exist on a tank with an external floating roof?
    a. When the roof is located anywhere under the top ring or course of the tank plates
    b. Only when the tank is empty
    c. Only when the roof is resting on its legs
    d. Answers a., b. and c. are all wrong
48. 5.53 What does an oxygen meter measure?
    a. The percentage of oxygen below the LEL of a hydrocarbon/air mixture
    b. The amount of oxygen needed to make a confined space safe for entry
    c. The percentage of oxygen contained in the atmosphere being sampled
    d. Answers a., b. and c. are all wrong
49. 5.86 What is the principal limitation of a filter or cartridge respirator?
    a. It does not supply oxygen
    b. The face piece tends to fog up
    c. The expense to replace the cartridges
    d. Keeping the face piece from sweating up
50. 5.44 Before entering a confined space, which tests are required?
    a. Oxygen content
    b. Lower explosive limit
    c. Toxic vapour testing
    d. Answers a., b. and c. are all correct
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