SECTION 6 - SAMPLING
คำชี้แจง
- ถ้าไม่กรอกทั้งชื่อ และนามสกุลของผู้ทำข้อสอบ ระบบจะไม่ตรวจข้อสอบให้
- ผลสอบจะเก็บเพียง 300 ระเบียนสุดท้าย โดยเรียงจากเวลาล่าสุด
- ถ้าทำข้อสอบไม่ครบ ระบบจะไม่ตรวจข้อสอบให้
- ผู้ทำข้อสอบจะมีเวลาในการทำข้อสอบเพียง 30 นาที หากเกินเวลา ระบบจะไม่ตรวจข้อสอบให้
- เมื่อมีการตรวจคำตอบ ระบบจะบันทึกชื่อ และคะแนนลงฐานข้อมูล พร้อมเวลาเริ่มทำ และเวลาสิ้นสุด
- เกณฑ์ตัดสินผ่านการทดสอบอยู่ที่ร้อยละ 90 หรือ 18 ข้อขึ้นไป
หน้าแรก ข้อสอบใหม่ สร้างใหม่ เฉลยข้อสอบ
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1. 6.01 Which industry documents describe the procedures for manual sampling of petroleum and petroleum products?
    a. API MPMS Chapter 17.1 / EI HM28
    b. IP 475 / API MPMS Chapter 8.1 / ISO 3170
    c. EI HM6 / API MPMS Chapter 8.2 / ISO 3171
    d. API MPMS Chapter 17.2
2. 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
3. 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
4. 6.42 When taking a running sample of a clear product such as jet fuel or a water-white chemical what procedure should you follow?
    a. Rinse the inside of the sample bottle with product prior to taking the sample
    b. Take a sample in a clear bottle to visually check the colour
    c. Ensure that product running down the sample cord cannot contaminate the sample
    d. Answers a., b. and c. are all correct
5. 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
6. 6.63 When drawing upper-middle-lower samples from any tank, which sample should be taken last?
    a. Lower
    b. Middle
    c. Upper
    d. It doesn t matte
7. 6.50 What is the name for a sample taken at a specific point in a tank?
    a. An all level sample
    b. A running sample
    c. A spot sample
    d. A single-tank composite sample
8. 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
9. 6.29 After obtaining a tank running sample, the inspector notices that the sampling bottle is full on withdrawing it from the tank. What should the inspector do?
    a. Pour some of the sample into a second container
    b. Pour some of the sample out of the bottle
    c. Retake the sample to comply with the method
    d. Answers a., b. or c. are all correct
10. 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
11. 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
12. 6.62 When upper-middle-lower samples are taken from a tank, what point is the upper sample taken from?
    a. 1/3 of the liquid height from the tank bottom
    b. At the middle of the tank outlet fitting
    c. At the middle of the upper third of the tank contents
    d. 15 cm [6 inches] off the tank bottom
13. 6.17 A representative sample is a portion extracted from the total volume that contains its constituents in the same proportions as those present in the total volume.
    a. True
    b. False


14. 6.64 When drawing upper-middle-lower samples from any tank, which sample should be taken second?
    a. Lower
    b. Middle
    c. Upper
    d. It doesn t matter
15. 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
16. 6.82 Why is a first foot sample taken?
    a. To determine the quality of the product in the shore tank
    b. To confirm that the vessel s tanks are clean
    c. To confirm that the product in the shore pipeline meets the specification
    d. As an indication that the cargo is has not been contaminated by residues from the ship s manifold or lines
17. 6.40 What is the principal reason for taking bottom (deadbottom) samples.
    a. To determine if sediment is present
    b. To obtain a sample for sulfur & viscosity determination
    c. To locate any free water not identified by water paste
    d. Bottom samples need not be taken if water paste indicates that no water is present
18. 6.83 According to ISO 3171 and API Chapter 8.2 what is the number of grabs suggested when using an automatic sampler for transfers lasting over 6 hours?
    a. 100,000
    b. 10,000
    c. 1,000
    d. 100
19. 6.19 What is the name of a sample obtained by lowering a stoppered container to the draw-off level of a tank, removing the stopper and withdrawing the container at a steady rate?
    a. Spot sample
    b. Running sample
    c. All-levels sample
    d. Composite sample
20. 6.36 What laboratory test will most likely be affected by not using dedicated sampling equipment for individual products or product groups?
    a. colour
    b. flashpoint
    c. sulphur
    d. Answers a., b. and c. are all correct
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