SECTION 5 - SAFETY
คำชี้แจง
- ข้อสอบชุดนี้มีเพียง 20 ข้อ
- ถ้าไม่กรอกทั้งชื่อ และนามสกุลของผู้ทำข้อสอบ ระบบจะไม่ตรวจข้อสอบให้
- ผลสอบจะเก็บเพียง 300 ระเบียนสุดท้าย โดยเรียงจากเวลาล่าสุด
- ถ้าทำข้อสอบไม่ครบ ระบบจะไม่ตรวจข้อสอบให้
- ผู้ทำข้อสอบจะมีเวลาในการทำข้อสอบเพียง 30 นาที หากเกินเวลา ระบบจะไม่ตรวจข้อสอบให้
- เมื่อมีการตรวจคำตอบ ระบบจะบันทึกชื่อ และคะแนนลงฐานข้อมูล พร้อมเวลาเริ่มทำ และเวลาสิ้นสุด
- เกณฑ์ตัดสินผ่านการทดสอบอยู่ที่ร้อยละ 90 หรือ 18 ข้อขึ้นไป
หากต้องการพิมพ์ใบรับรองผลคะแนน โปรดใช้เครื่อง Computer ในการทดสอบและมีจำนวนข้อที่ใช้สอบจำนวน 20 ข้อขึ้นไป และจะแสดงผลสำหรับผู้ที่ผ่านเกณฑ์การสอบเท่านั้น โดยเกณฑ์การสอบอยู่ที่ร้อยละ 90 หรือ 18 ข้อขึ้นไป คลิกที่นี่เพื่อเพิ่มจำนวนข้อทดสอบ
1. 5.48 What do the initials LEL stand for?
    a. Low explosion location
    b. Low environmental levels
    c. Lower environmental level
    Lower explosive limit
2. 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
3. 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
4. 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
5. 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
6. 5.50 What do the initials UEL stand for?
    a. Upper environmental level
    b. Unknown environmental level
    c. Upper explosive limit
    d. Unknown explosive levels
7. 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
8. 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
9. 5.21 Before gauging a tank, how can static electricity be discharged from your body?
    a. By using a tank gauge meter
    b. By touching a grounded structure such as a tank railing, with bare hands
    c. By using natural fiber sampling cords
    d. By touching a grounded structure such as a tank railing, while wearing rubber gloves
10. 5.26 A portable electronic thermometer should always be grounded after the probe has been lowered into the liquid.
    a. True
    b. False


11. 5.16 Corrosive liquids will directly injure the body tissue on contact.
    a. True
    b. False


12. 5.77 What are the characteristics of hydrogen sulfide?
    a. It is a pale yellow gas with a sweetish taste and strong pungent odour
    b. It is a pale yellow gas with the odour of rotten eggs
    c. It is a colourless gas with a sweetish taste and the odour of rotten eggs
    d. It is a colourless gas with little or no odour
13. 5.34 What must you do in order to transport flammable liquid samples on a public highway?
    a. Fully label all samples
    b. Place the samples in approved DOT containers
    c. Consult a Safety Data Sheet for the product being transported
    d. Answers a., b. and c. are all correct
14. 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
15. 5.54 What is the normal oxygen content of the air?
    a. 15.1%
    b. 19.1%
    c. 20.9%
    d. 25.9%
16. 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
17. 5.89 When working in an area where peronal monitors indicate the presence of hydrogen sulfide you must wear SCBA
    a. True
    b. False


18. 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
19. 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
20. 5.52 An explosimeter (explosion meter) measuring LEL% is utilized to sample the atmosphere within a cargo tank and a reading of 15% is observed. What does the reading mean?
    a. The atmosphere in the tank contains 15% oxygen
    b. The atmosphere in the tank is 15% of the lowest concentration of an explosive mixture of air and hydrocarbon vapours
    c. The atmosphere in the tank is 15% hydrocarbon vapours
    d. The atmosphere in the tank is a 15% mixture of air and hydrocarbon vapours
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