SECTION 6 - SAMPLING
คำชี้แจง
- ข้อสอบชุดนี้มีเพียง 30 ข้อ
- ถ้าไม่กรอกทั้งชื่อ และนามสกุลของผู้ทำข้อสอบ ระบบจะไม่ตรวจข้อสอบให้
- ผลสอบจะเก็บเพียง 300 ระเบียนสุดท้าย โดยเรียงจากเวลาล่าสุด
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- ผู้ทำข้อสอบจะมีเวลาในการทำข้อสอบเพียง 30 นาที หากเกินเวลา ระบบจะไม่ตรวจข้อสอบให้
- เมื่อมีการตรวจคำตอบ ระบบจะบันทึกชื่อ และคะแนนลงฐานข้อมูล พร้อมเวลาเริ่มทำ และเวลาสิ้นสุด
- เกณฑ์ตัดสินผ่านการทดสอบอยู่ที่ร้อยละ 90 หรือ 27 ข้อขึ้นไป
หากต้องการพิมพ์ใบรับรองผลคะแนน โปรดใช้เครื่อง Computer ในการทดสอบและมีจำนวนข้อที่ใช้สอบจำนวน 20 ข้อขึ้นไป และจะแสดงผลสำหรับผู้ที่ผ่านเกณฑ์การสอบเท่านั้น โดยเกณฑ์การสอบอยู่ที่ร้อยละ 90 หรือ 27 ข้อขึ้นไป คลิกที่นี่เพื่อเพิ่มจำนวนข้อทดสอบ
1. 6.77 When/where should samples be labeled?
    a. In the laboratory.
    b. Immediately after the sample is obtained.
    c. Before transportation to the laboratory.
    d. Immediately upon arrival in the laboratory
2. 6.53 A bottom (dead bottom) sample may not always be taken at the very bottom of a tank. What is the correct procedure?
    a. Always specify the location where the sample was taken, for example Approximately 15 cm [6 inches] from the bottom
    b. Always take a bottom sample 5 cm [2 inches] off the actual bottom because that is where the neck of the bottle will rest when the bottle is on its side
    c. Always use a dead bottom sampler to draw bottom samples
    d. Always use a zone sampler to draw bottom samples
3. 6.61 When drawing upper-middle-lower samples from any tank, which sample should be taken first?
    a. Lower
    b. Middle
    c. Upper
    d. It doesn t matter
4. 6.59 Which of the following statements about upper, middle, and lower samples is correct?
    a. They can be taken in any order.
    b. They must be taken in the order lower, middle, upper.
    c. They must be taken in the order upper, middle, lower.
    d. They are less reliable than an all-levels sample, no matter how they are taken
5. 6.38 When taking a first foot sample of a jet fuel cargo it is recommended to
    a. Use a clear bottle
    b. Use only steel sampling cans
    c. Use only a clean zone sampler
    d. Use an amber bottle
6. 6.20 What is the name of a sample obtained by lowering an unstoppered container to the draw-off level of a tank and withdrawing the container without stopping?
    a. Multi-level sample
    b. Running sample
    c. All-levels sample
    d. Composite sample
7. 6.41 If the sample bottle comes up full when taking a running sample what action should be taken?
    a. Pour out 20% - 25% of the sample, then cap and label the sample
    b. Cap and label sample then place it in an ice chest
    c. Make a special notation on the sampling report
    d. Discard the sample and re-sample the tank so that the bottle is about 80% full
8. 6.55 A storage tank was manually gauged and found to have a product innage of 12.000 m [38 feet 6 inches]. The tank gauge height is 13.000 m [48 feet 10 inches]. At what innage level should the lower spot sample be obtained?
    a. 150 mm [6 inches] from the tank bottom
    b. At the outlet (suction) level
    c. 2.000 m [6 feet 5 inches] from the tank bottom
    d. 4.000 m [12 feet 10 inches] from the tank bottom
9. 6.66 An automatic in-line sampling system will collect free water and entrained water.
    a. True
    b. False


10. 6.26 How is a running sample obtained?
    a. By lowering an unstoppered container from the top of the oil to the level of the outlet and returning it to the top of the oil at a uniform rate so that the container is about 80% full when withdrawn from the oil.
    b. By lowering a stoppered container to the level of the outlet, then opening the sampler and raising it at a uniform rate so that it is about 80% full when withdrawn from the oil.
    c. By lowering a stoppered beaker to the bottom of the tank contents, then opening the sampler and raising and lowering it at a uniform rate until it is full.
    d. By lowering a stoppered beaker to the bottom of the tank contents, then opening the sampler and raising and lowering it at a uniform rate until it is full.
11. 6.03 Which of the following types of sample container should be used to obtain an initial first foot sample?
    a. Clear glass bottles
    b. Amber glass bottles
    c. Plastic bottles
    d. Epoxy lined metal cans
12. 6.73 Both free water and entrained water are found in the sample taken by an automatic in-line sampling system.
    a. True
    b. False


13. 6.30 A storage tank is manually gauged and found to contain 4.0 metres [12 feet] of product. How many spot samples as a minimum should be obtained from this tank?
    a. 2 (Upper and lower)
    b. 3 (Upper, middle and lower)
    c. 1 (Middle)
    d. None
14. 6.04 Which of the following products should be stored in amber bottles?
    a. Gasoline, Diesel, Jet A, Styrene
    b. Fuel oil, Gasoil
    c. Heavy aromatics
    d. No. 6 F.O, Heavy Fuel Oil
15. 6.15 When should a free water sample be taken ?
    a. When requested by the customer.
    b. They are not necessary.
    c. Immediately after every loading, except for chemicals.
    d. Whenever there is a sufficient quantity to sample
16. 6.39 What is the principal disadvantage of using a sampling can/beaker to sample marine vessel tanks?
    a. They are too heavy to hoist up and down
    b. If one tank is contaminated, subsequent samples could also become contaminated
    c. There is no cap that fits them
    d. They are too expensive and might be lost in the tank
17. 6.05 Which of the following types of container closure devices should not be used with glass bottles?
    a. Plastic screw caps
    b. Rubber stoppers
    c. Metal screw caps
    d. Cork stoppers
18. 6.79 When should a sample be labelled?
    a. On returning to the office
    b. After removing them from the sample transportation box.
    c. Just before leaving the facility
    d. Immediately after it is obtained
19. 6.57 A storage tank was manually gauged and found to have a product innage of 9.000 m [38 feet 6 inches]. The tank gauge height is 12.000 m [48 feet 10 inches]. At what innage level should the upper product spot sample be obtained?
    a. 7.500 m [32 feet 1 inch] from the tank bottom
    b. 2.000 m [5 feet 5 inches] below the surface of the product
    c. 11.850 m [40 feet 9 inches] from the tank bottom
    d. 150m [6 inches] below the surface of the product
20. 6.25 How is an all-levels sample obtained?
    a. By submerging an unstoppered container at a uniform rate to a point near the tank draw-off level then raising it so that it is no more than 85% full on emerging from the liquid.
    b. By blending tank upper, middle and lower samples.
    c. By submerging a stoppered container to a point as near as possible to the draw-off (suction) level, then opening the sampler and raising it at a rate such that it is about 80% full on emerging from the liquid.
    d. By submerging a stoppered container to the bottom of the product in a tank, then opening the sampler and raising it at a uniform rate until the container is full.
21. 6.48 Where may volumetric composite samples be prepared?
    a. Only in a laboratory
    b. On board a vessel if separate samples are taken to the laboratory for analysis
    c. Preferably in a laboratory but also at another location if conditions and equipment allow the sample to be composited in proportion to the volume of material in each compartment
    d. On board a vessel for crude oil cargos only
22. 6.58 Where is an upper sample taken from?
    a. The surface of the liquid
    b. 150 mm [6 inches] below the surface of the liquid
    c. The mid-point of the upper third of the liquid
    d. Anywhere in the top portion of the tank
23. 6.21 Before sampling oil in a tank, it is necessary to locate the oil/water interface.
    a. True
    b. False


24. 6.76 When drawing a running sample for RVP, how full should the sample bottle be when withdrawn from the tank?
    a. 50% - 60% full
    b. 70-80% full
    c. 80-90% full
    d. 100% full
25. 6.32 For a running sample to be taken correctly, the sample container must be?
    a. At least half full
    b. A zone sampler
    c. A bottle and cage
    d. Approximately 70% to 85% full
26. 6.71 The controller on an automatic sampler is a device that governs the operation of the sample extractor.
    a. True
    b. False


27. 6.70 Before testing, the product in the receiver of an automatic sampler must be mixed.
    a. True
    b. False


28. 6.68 Which of the following items are parts of an automatic sampling system?
    a. Probe
    b. Receiver
    c. Controller
    d. Answers a., b. and c. are all correct
29. 6.33 Which of the following statements is correct?
    a. Closed and restricted sampling equipment is essentially the same
    b. Restricted sampling equipment may allow small amounts of vapour to escape to atmosphere
    c. Closed sampling equipment is designed to prevent any escape of vapour to atmosphere
    d. Answers b. and c. are correct
30. 6.49 At what point is a bottom (dead-bottom) sample taken?
    a. 15 cm [6 inches] below the outlet
    b. 10 cm [4 inches] below the outlet
    c. At the lowest point in the tank
    d. Immediately above the free water level
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