Emea Static Sealing Training - Level Test | Attempts: 162

2.

What are all requirements for compression packing?

Flexibility, wear resistance, strength, porous, abrasive
Flexibility, wear resistance, strength, chemical resistance, high friction
Flexibility, wear resistance, strength, chemical resistance, low friction
Flexibility, wear resistance, strength, chemical resistance, low thermal conductivity

Correct Answer

A. Flexibility, wear resistance, strength, chemical resistance, low friction

Explanation

Compression packing is used to create a seal in applications where fluid leakage needs to be prevented. The requirements for compression packing include flexibility, wear resistance, strength, chemical resistance, and low friction.

Flexibility is necessary for the packing to conform to the shape of the sealing area. Wear resistance ensures that the packing can withstand the friction and abrasion that may occur during operation. Strength is important to maintain the integrity of the packing under pressure. Chemical resistance is needed to withstand the specific fluids or chemicals that the packing will be exposed to. Finally, low friction is desired to minimize heat generation and reduce wear on the packing material.

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3.

PTFE is used widely as a packing and gasket material because of its:

Temperature Resistance
Mechanical Properties
Strenght
Chemical Resistance

Correct Answer

A. Chemical Resistance

Explanation

PTFE, or polytetrafluoroethylene, is commonly used as a packing and gasket material due to its exceptional chemical resistance. It is highly resistant to corrosion and can withstand exposure to a wide range of chemicals, including acids, bases, solvents, and aggressive media. This makes it an ideal choice for applications where the material will come into contact with various chemicals, ensuring durability and longevity. Additionally, PTFE's chemical resistance also contributes to its ability to maintain its mechanical properties and strength, further enhancing its suitability for packing and gasket applications.

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4.

What is the calculation for determining the proper packing cross section for installation?

C.S. = (stuffing box bore - shaft diameter) / 4
C.S. = (shaft diameter - stuffing box bore) / 2
C.S. = (shaft diameter + stuffing box bore) / 2
C.S. = (stuffing box bore - shaft diameter) / 2

Correct Answer

A. C.S. = (stuffing box bore - shaft diameter) / 2

Explanation

The correct answer is C.S. = (stuffing box bore - shaft diameter) / 2. This calculation is used to determine the proper packing cross section for installation. By subtracting the shaft diameter from the stuffing box bore and then dividing the result by 2, we can find the appropriate cross section size for the packing material. This calculation ensures that the packing is properly sized to create a seal between the shaft and the stuffing box, preventing leakage.

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5.

All packing rings should be installed one ring at a time.

True
False

Correct Answer

A. True

Explanation

The statement suggests that when installing packing rings, it is important to install them one ring at a time. This implies that each ring should be carefully and individually placed, ensuring proper alignment and fitting. Installing them all at once may lead to misalignment or improper sealing, compromising the effectiveness of the packing rings. Therefore, it is crucial to follow a step-by-step approach while installing packing rings to ensure their correct installation and functionality.

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6.

Graphite is less noble (more anodic) then Zinc.

True
False

Correct Answer

A. False

Explanation

Graphite is not less noble than zinc; in fact, graphite is more noble (less anodic) than zinc. The nobility of a material refers to its tendency to corrode or oxidize. In this case, graphite is more resistant to corrosion compared to zinc, making it a more noble material. Therefore, the correct answer is False.

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7.

Which of the following is a 45 degree angle cut which is typically used for valve packings in order to exclude visual leakage?

A skive joint
Both a skive joint and a butt joint.
A butt joint
A pipe joint

Correct Answer

A. A skive joint

Explanation

A skive joint is a 45 degree angle cut that is commonly used for valve packings to prevent visual leakage. This type of joint allows for a tight and secure connection between two surfaces, ensuring that there is no visible leakage. It is a commonly used technique in industries where visual inspection is crucial, such as in valve packings where any leakage could indicate a malfunction or failure.

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8.

Which of the following Chesterton packings have an active corrosion inhibitor?

Style 5300
Style 1724
Style 1622
None of the above

Correct Answer

A. None of the above

Explanation

The question asks which of the given Chesterton packings have an active corrosion inhibitor. The answer is "none of the above," which means that none of the packings mentioned (Style 5300, Style 1724, and Style 1622) have an active corrosion inhibitor.

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9.

Which Chesterton Packing would you select for the following application:Block Valve, Steam, 250°C

Style 1601
Style 1622
Style 1724
Style 1730

Correct Answer

A. Style 1601

10.

Gland pressure will be distributed efficiently up to how many rings?

1-2 rings
4-6 rings
10-12 rings

Correct Answer

A. 1-2 rings

Explanation

The correct answer is 1-2 rings. This means that gland pressure will be distributed efficiently up to a maximum of 1-2 rings. This suggests that the efficiency of pressure distribution decreases as the number of rings increases.

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11.

Which of the following standards describes a test an qualification procedure for valves for fugitive emissions?

ISO 15848-1
API 622
API 589
EN 1514-1

Correct Answer

A. ISO 15848-1

Explanation

ISO 15848-1 is the correct answer because it is the standard that specifically describes a test and qualification procedure for valves for fugitive emissions. This standard provides guidelines for evaluating the ability of valves to control fugitive emissions through leakage and is widely recognized in the industry. API 622, API 589, and EN 1514-1 are not relevant to this specific topic.

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Emea Static Sealing Training - Level Test

Chesterton style 1600 is an expanded graphite packing reinforced with

Quiz Preview

What are all requirements for compression packing?

PTFE is used widely as a packing and gasket material because of its:

What is the calculation for determining the proper packing cross section for installation?

All packing rings should be installed one ring at a time.

Graphite is less noble (more anodic) then Zinc.

Which of the following is a 45 degree angle cut which is typically used for valve packings in order to exclude visual leakage?

Which of the following Chesterton packings have an active corrosion inhibitor?

Which Chesterton Packing would you select for the following application:Block Valve, Steam, 250°C

Gland pressure will be distributed efficiently up to how many rings?

Which of the following standards describes a test an qualification procedure for valves for fugitive emissions?