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 27 ข้อขึ้นไป
หน้าแรก ข้อสอบใหม่ สร้างใหม่ เฉลยข้อสอบ
หากต้องการพิมพ์ใบรับรองผลคะแนน โปรดใช้เครื่อง Computer ในการทดสอบ
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1. 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


2. 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
3. 6.24 After taking a spot sample of gasoline, it is permissible to immediately pour off some of the product to allow room in the container for expansion.
    a. True
    b. False


4. 6.07 Which documents contain guidance for selecting sample containers?
    a. API MPMS Chapter 8.1 / ISO 3170
    b. IP 476 / API MPMS Chapter 8.2 / ISO 3171
    c. API MPMS Chapter 8.3
    d. API MPMS Chapter 8.4
5. 6.78 Why is it important to label all samples as soon as possible?
    a. National and/or local Government regulations require it.
    b. An incorrectly labeled sample could generate a legal action
    c. It is easy to label samples incorrectly if they are not labelled promptly
    d. Answers a., b. and c. are all correct
6. 6.65 At what vertical location in the liquid is an upper sample taken?
    a. 1/6 of the liquid depth below the surface of the liquid
    b. 25 mm [1 inch] below the surface of the liquid
    c. 150 mm [6 inches] below the surface of the liquid
    d. The middle of the lower third of the tank
7. 6.22 Before sampling a clean product or petrochemical, the container should always be rinsed with the product when possible.
    a. True
    b. False


8. 6.13 Which of the following samples could be taken with a zone sampler?
    a. U, M, L samples
    b. Running samples
    c. Spot samples
    d. Answers a., and c. are correct
9. 6.28 During a marine custody transfer, which of following is the preferred sample to best represent the cargo transferred?
    a. A composite of shore tank samples.
    b. A shore tank sample after a transfer
    c. Automatic pipeline samples obtained throughout the transfer
    d. Vessel composite samples
10. 6.12 What type of equipment would you use to sample liquid in a 55-gallon drum?
    a. A dead-bottom sampler
    b. A bottle and cage.
    c. A sampling tube.
    d. A dipper sampler.
11. 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
12. 6.37 Since the volume of material in the tank does not affect laboratory analysis, tanks that are sampled do not need to be gauged.
    a. True
    b. False


13. 6.69 The sample receiver of an automatic sampling system must be inspected to ensure that it is clean and dry before it is used.
    a. True
    b. False


14. 6.46 Before taking a line sample it is important to?
    a. Ground your equipment
    b. Flush the tap and sample line until they are purged
    c. Call your supervisor
    d. Answers a., b. and c. are all correct
15. 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
16. 6.45 When taking liquid samples for hydrogen sulphide testing in accordance with IP 570 [ASTM D7621] what is the approximate level to which sample containers must be filled?
    a. 50%
    b. 80%
    c. 95%
    d. 100%
17. 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
18. 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
19. 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
20. 6.56 A storage tank was manually gauged and found to have a product innage of 11.500 m [38 feet 6 inches] . The tank gauge height is 12.500 m [48 feet 10 inches] . At what innage level should the middle product spot sample be obtained?
    a. 6.750 m [12 feet 10 inches] from the tank bottom
    b. 5.750 m [19 feet 3 inches] from the tank bottom
    c. 6.250 m [24 feet 5 inches] from the tank bottom
    d. 6.250 m [6 feet 5 inches] below the surface of the product
21. 6.18 Why do sampling standards recommend that a vapour space should be left at the top of each sample container?
    a. To permit the surface of the liquid to be visible in the laboratory
    b. To allow space to test the vapour content of the sample
    c. To allow space for safe expansion of the liquid
    d. To avoid the loss of light components
22. 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
23. 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
24. 6.06 Which product requires particular care when selecting a sample container?
    a. Gasoline
    b. Fuel oil
    c. Benzene
    d. Jet fuel
25. 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