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 45 ข้อขึ้นไป
หน้าแรก ข้อสอบใหม่ สร้างใหม่ เฉลยข้อสอบ
หากต้องการพิมพ์ใบรับรองผลคะแนน โปรดใช้เครื่อง Computer ในการทดสอบ
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1. 6.21 Before sampling oil in a tank, it is necessary to locate the oil/water interface.
    a. True
    b. False


2. 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%
3. 6.47 During preliminary sampling of a shore tank that will be used to load a vessel, you should also obtain a tape or side gauge reading.
    a. True
    b. False


4. 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
5. 6.66 An automatic in-line sampling system will collect free water and entrained water.
    a. True
    b. False


6. 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
7. 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of the outlet and returning it to the top of the oil at a uniform rate so that the container is about 80% full when withdrawn from the oil.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to the level of the outlet, then opening the sampler and raising it at a uniform rate so that it is about 80% full when withdrawn from the oil.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.
8. 6.34 When sampling a shore tank containing a product with an observed density of 1100 kg/m3, [API -2°] and the main concern is water, where would the water proabably be found?
    a. 15 cm [6 ] off the bottom
    b. Stratified between the lower and middle levels
    c. Floating on top of the cargo
    d. No water can be found in oils with a density greater than 1000 kg/m3[with negative API]
9. 6.16 Why are free water samples important?
    a. To check for contaminated water under gasoline
    b. To determine the likely source of the free water
    c. To determining the influence of free water on the API gravity of a crude oil cargo
    d. Answers a., b. and c. are all wrong
10. 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