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1. 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
2. 5.83 Why is the sense of smell not reliable for detecting hydrogen sulfide?
    a. It is difficult to detect by sense of smell
    b. The level at which you can smell it is above the permissible exposure limit
    c. At 100 ppm a person s sense of smell is deadened within minutes, thereby giving that person a false sense of security
    d. You might have a cold and be unable to breath through your nose
3. 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.
4. 5.48 What do the initials LEL stand for?
    a. Low explosion location
    b. Low environmental levels
    c. Lower environmental level
    Lower explosive limit
5. 5.40 Which of the following are considered to be confined spaces?
    a. A cofferdam
    b. An external floating roof tank
    c. A ship s pump-room
    d. Answers a., b. and c. are all correct
6. 5.26 A portable electronic thermometer should always be grounded after the probe has been lowered into the liquid.
    a. True
    b. False

7. 5.27 What can help prevent a build-up and/or discharge of static electricity when sampling?
    a. Use of a sampling cord made of synthetic fibre
    b. Tying the end of the sampling cord to the railing of the tank
    c. Use of a sampling cord that contains no synthetic fibre
    d. Holding the sample cord against the gauge hatch throughout the sampling operation
8. 5.46 Which of the following are examples of a confined space?
    a. A cargo tank
    b. A grain silo
    c. A pump-room on a ship
    d. Answers a., b. and c. are all correct
9. 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
10. 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

11. 5.74 When working in an environment suspected of containing H2S, personal monitors must show a level below (or provide an alarm at) what limit?
    a. 5 ppm (10 ppm in USA)
    b. 1 ppm (2 ppm in USA)
    c. 15 ppm (20 ppm in USA)
    d. 0.1 ppm (0.2 ppm in USA)
12. 5.55 Which of the following conditions can cause false readings on an explosion meter?
    a. Low hydrocarbon vapor content
    b. High moisture content
    c. Low oxygen content
    d. Both b. and c. are correct
13. 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
14. 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
15. 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%
16. 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
17. 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
18. 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
19. 5.71 Who or what should you consult if you need to know detailed safety or exposure information about benzene?
    a. Your doctor or pharmacist
    b. Your Safety Manual
    c. The Safety Data Sheet
    d. The International Safety Guide for Oil Tankers and Terminals (ISGOTT)
20. 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
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