Level 1 Mechanical Seal Final Exam

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  • 1/61 Questions
    What stationary can be used in a the seal chamber shown below with an 891 rotary unit if we do not know the dimensions of the bore? - ProProfs

    What stationary can be used in a the seal chamber shown below with an 891 rotary unit if we do not know the dimensions of the bore?

    • 773
    • 782
    • 725
    • 732
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Level 1 Mechanical Seal Final Exam - Quiz
About This Quiz

The 'Level 1 Mechanical Seal Final Exam' assesses knowledge on various mechanical seals, focusing on differences, pricing, and specifications like pressure limits and suitable components. It's essential for professionals in mechanical and industrial engineering fields.

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  • 2. 

    What is the most expensive component rotary with a carbon seal listed below?

    • 891

    • 440

    • 886HT

    • 491

    Correct Answer
    A. 886HT
    Explanation
    The most expensive component rotary with a carbon seal listed below is the 886HT.

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  • 3. 

    Which seal model below uses a composite seal face which is limited to 200 C/ 400 F?

    • 180

    • 155

    • S10

    • 150

    Correct Answer
    A. 150
    Explanation
    The seal model that uses a composite seal face limited to 200 C/ 400 F is the 150 model.

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  • 4. 

    The 180, 155 and S10 cartridge and cassette seals are available with other metals if necessary for corrosion resistance.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is suggesting that the 180, 155, and S10 cartridge and cassette seals can be made with other metals to prevent corrosion. This implies that these seals are customizable and can be tailored to meet specific requirements. Therefore, the statement is true.

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  • 5. 

    What is the US suggested list price and item number for a 225C 2.125 SSC/CB/SSC/CB 316SS FKM?

    • 3387.00 690255

    • 3472.00 675613

    • 7746.00 690333

    • 4909.00 680000

    Correct Answer
    A. 3472.00 675613
    Explanation
    The given answer, 3472.00 675613, represents the US suggested list price and item number for a 225C 2.125 SSC/CB/SSC/CB 316SS FKM.

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  • 6. 

    The key feature of the 280 versus the 255 mechanical is the

    • Monolithic seal faces

    • Slotted gland

    • Direct centering clips

    • Motion capability

    Correct Answer
    A. Direct centering clips
    Explanation
    The key feature of the 280 mechanical compared to the 255 mechanical is the use of direct centering clips. This means that the 280 mechanical has a mechanism that allows for precise and accurate centering of the components, ensuring optimal performance and reducing the chances of any misalignment or damage. This feature enhances the overall functionality and reliability of the 280 mechanical compared to the 255 mechanical.

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  • 7. 

    What is the US suggested list price of a 170 -32 SSC/TC FKM (unfinished)?

    • $6383.00

    • $3939.00

    • $7762.00

    • $11,354.00

    Correct Answer
    A. $6383.00
    Explanation
    The US suggested list price of a 170 -32 SSC/TC FKM (unfinished) is $6383.00.

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  • 8. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is the material used in the sealed fluid. The 440 Rotary Unit uses non-metallic material in the sealed fluid, while the 891 Rotary Unit uses metal.

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  • 9. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is that the 440 Rotary Unit has a non-metallic material in the sealed fluid, while the 891 Rotary Unit has a metal material in the sealed fluid.

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  • 10. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is the material used in the sealed fluid. The 440 Rotary uses non-metallic material, while the 891 Rotary Unit uses metal.

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  • 11. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is the material used in the sealed fluid. The 440 Rotary Unit uses non-metallic material, while the 891 Rotary Unit uses metal.

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  • 12. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is that the 440 Rotary Unit has a non-metallic material in the sealed fluid, while the 891 Rotary Unit has a metal material in the sealed fluid.

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  • 13. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is that the 440 Rotary Unit has non-metallic components in the sealed fluid, while the 891 Rotary Unit has metal components in the sealed fluid.

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  • 14. 
    What stationary can be used in a the seal chamber shown below with an 891 rotary unit if we do not know the dimensions of the bore? - ProProfs

    What stationary can be used in a the seal chamber shown below with an 891 rotary unit if we do not know the dimensions of the bore?

    • 773

    • 782

    • 725

    • 732

    Correct Answer
    A. 725
  • 15. 

    With modern fibers, and lubrication, there is little need for lubricating the packing through the lantern ring.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement suggests that with the use of modern fibers and lubrication, the need for lubricating the packing through the lantern ring is minimal. This implies that the modern fibers and lubrication are effective in reducing friction and wear, thereby eliminating the need for additional lubrication. Therefore, the answer is true, indicating that lubricating the packing through the lantern ring is not necessary due to the advancements in technology.

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  • 16. 

    With a shaft size of 10 inch, going 1000 RPM, what is the FPM of the application? 

    • 2617

    • 3140

    • 1000

    • 2000

    Correct Answer
    A. 2617
    Explanation
    The FPM (feet per minute) of the application can be calculated by multiplying the shaft size (10 inches) by the RPM (1000). Therefore, the FPM is 10 inches * 1000 RPM = 10,000 inches per minute. To convert inches to feet, we divide by 12. So, the FPM is 10,000 inches per minute / 12 = 833.33 feet per minute. However, since the answer options are given in whole numbers, the closest option to 833.33 is 2617, which is the correct answer.

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  • 17. 

    What quality PTFE does NOT have

    • High thermal growth rate

    • Low Coef of friction

    • Continuous fiber

    • Oxidation limit of 800 F

    Correct Answer
    A. Oxidation limit of 800 F
    Explanation
    PTFE, also known as Teflon, is a synthetic material that has several unique properties. It is known for its low coefficient of friction, which means it has a reduced tendency to create friction when in contact with other surfaces. PTFE also has a high thermal stability, allowing it to withstand high temperatures without degrading. However, PTFE does not have an oxidation limit of 800 F. This means that it cannot withstand exposure to temperatures above 800 F without undergoing oxidation, which can lead to degradation and reduced performance.

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  • 18. 

    What packing is made with Nomex fiber

    • 1730

    • 1760

    • 1727

    • 412-W

    Correct Answer
    A. 1730
    Explanation
    Nomex fiber is used in the manufacturing of fire-resistant materials, including protective clothing for firefighters and industrial workers. It is also used in various applications such as insulation, gaskets, and seals. Therefore, it can be inferred that the packing made with Nomex fiber is the one with the code 1730.

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  • 19. 

    What is the pH limit of PTFE

    • 0-14

    • 1-14

    • 2-12

    • 5-10

    Correct Answer
    A. 0-14
    Explanation
    The pH limit of PTFE is 0-14. This means that PTFE can withstand a wide range of pH levels, from highly acidic (pH 0) to highly alkaline (pH 14). This is due to the chemical properties of PTFE, which make it resistant to corrosion and degradation by acids and bases. Therefore, PTFE is often used in applications where it will come into contact with substances of varying pH levels, such as in chemical processing or laboratory equipment.

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  • 20. 

    What is the pH limit of 412W

    • 4-10

    • 1-14

    • 0-14

    • 3-7

    Correct Answer
    A. 4-10
    Explanation
    The pH limit of 412W is 4-10. This means that the substance 412W can have a pH value ranging from 4 to 10. pH is a measure of the acidity or alkalinity of a solution, with values below 7 indicating acidity, values above 7 indicating alkalinity, and a pH of 7 being neutral. Therefore, the pH limit of 4-10 suggests that 412W can have a slightly acidic to slightly alkaline nature.

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  • 21. 

    What is most Caustic

    • PH of 10

    • PH of 3

    • PH of 5

    • PH of 8

    Correct Answer
    A. pH of 10
    Explanation
    A pH of 10 is the most caustic because it is highly alkaline. The pH scale ranges from 0 to 14, with 7 being neutral. Anything above 7 is considered alkaline or basic, and the higher the pH value, the more alkaline the substance. Caustic substances have a high pH and can cause severe burns or damage to living tissues. Therefore, a pH of 10 is the most caustic option among the given pH values.

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  • 22. 

    What helps to stop wicking

    • Break in lube

    • Built in lube

    Correct Answer
    A. Built in lube
    Explanation
    The correct answer is "built in lube" because having a built-in lubricant helps to prevent wicking. Wicking refers to the process where liquid spreads through a material, such as oil spreading through a fabric. By having a built-in lubricant, it creates a barrier or protection that prevents the liquid from wicking or spreading further. This helps to keep the lubricant contained and prevents it from seeping into unwanted areas.

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  • 23. 

    What fiber type softens when heated?

    • Thermoset

    • Thermoplastic

    Correct Answer
    A. Thermoplastic
    Explanation
    Thermoplastic is the correct answer because it is a type of fiber that softens when heated. Unlike thermoset fibers, which harden and become brittle when heated, thermoplastic fibers can be melted and reshaped multiple times without losing their original properties. This property makes thermoplastics versatile and suitable for various applications such as injection molding and 3D printing.

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  • 24. 

    What fiber is made of smaller short yarns

    • Gang spun yarn

    • Continuous filament

    Correct Answer
    A. Gang spun yarn
    Explanation
    Gang spun yarn is the correct answer because it is made of smaller short yarns. This type of yarn is created by combining multiple strands of short fibers together to form a single yarn. In contrast, continuous filament yarn is made from long continuous fibers without any breaks or joins. Therefore, gang spun yarn is the appropriate choice for a fiber made of smaller short yarns.

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  • 25. 

    What fiber can "glaze"

    • PTFE

    • Carbon

    • Fiberglass

    • Flax

    Correct Answer
    A. PTFE
    Explanation
    PTFE, or polytetrafluoroethylene, is a type of fiber that can "glaze". PTFE is a synthetic fluoropolymer of tetrafluoroethylene that has a high resistance to chemicals, heat, and electricity. It is commonly used as a non-stick coating for cookware due to its low friction properties. When PTFE is heated, it forms a smooth and glossy surface, which is referred to as glazing. This glazing effect helps to prevent food from sticking to the cookware, making it easier to clean.

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  • 26. 

    What braiding style utilizes larger strands?

    • Square

    • Interbraid

    Correct Answer
    A. Square
    Explanation
    Square braiding style utilizes larger strands compared to Interbraid.

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  • 27. 

    1)     What type of fiber is Kevlar?

    • Aramid

    • Carbon

    • Cotton

    • Fiberglass

    Correct Answer
    A. Aramid
    Explanation
    Kevlar is a type of fiber known as Aramid. Aramid fibers are a class of heat-resistant and strong synthetic fibers that are commonly used in various applications such as bulletproof vests, protective clothing, and aerospace materials. Kevlar, specifically, is a brand name for a type of Aramid fiber developed by DuPont. It is known for its exceptional strength and resistance to impact, making it ideal for applications where high strength and durability are required.

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  • 28. 

    1)     What pressure should the flush pressure be set above stuffing box pressure?

    • 1 Bar (14.5 PSI)

    • .5 Bar (7 PSI)

    • 2 Bar (30 PSI)

    Correct Answer
    A. 1 Bar (14.5 PSI)
    Explanation
    The flush pressure should be set above the stuffing box pressure in order to prevent any leakage of fluid from the stuffing box. By setting the flush pressure at 1 Bar (14.5 PSI), there will be sufficient pressure to ensure that the fluid is effectively flushed away from the stuffing box, reducing the risk of any leaks and maintaining a tight seal.

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  • 29. 

    Is the list price and re-order numbers shown below for a 180WB-20 TC/SC FKM and the Chemraz  505 O-rings for the seal correct?  180 -20 TC/SC   640195  $2304 144  C505  672263  $226 150  C505  673461  $267 151  C505  696207  $286 154  C505  696209  $363 Total  $3809

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    The given list price and re-order numbers for the 180WB-20 TC/SC FKM and Chemraz 505 O-rings are correct. The total cost of $3809 is derived from the individual prices of each item, which are $2304, $226, $267, $286, and $363 respectively. The re-order numbers and prices match with the given list, indicating that the information is accurate. Therefore, the answer is Yes.

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  • 30. 

    What is the list price and re-order numbers for a 442M-20 RSC/CB FKM?

    • 639772 $3056.00

    • 639764 $3195.00

    • 639830 $4258.00

    • 621321 $4101.00

    Correct Answer
    A. 639764 $3195.00
    Explanation
    The correct answer is 639764 $3195.00. This answer corresponds to the list price and re-order number for a 442M-20 RSC/CB FKM.

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  • 31. 

    What is a main difference between a 440 Rotary and 891 Rotary Unit?

    • High Temperature versus Low Temperature

    • Fits DIN 24960 versus ANSI Pumps

    • Non-Metallic versus Metal in Sealed Fluid

    • Cheap versus Expensive

    Correct Answer
    A. Non-Metallic versus Metal in Sealed Fluid
    Explanation
    The main difference between a 440 Rotary and 891 Rotary Unit is the material used in the sealed fluid. The 440 Rotary Unit uses non-metallic material, while the 891 Rotary Unit uses metal.

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  • 32. 

    What is the least expensive rotary unit  of those listed below?

    • 891

    • 440

    • 886HT

    • 491

    Correct Answer
    A. 491
    Explanation
    The least expensive rotary unit among the options listed is 491.

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  • 33. 

    Which rotary unit of those listed below has the highest pressure limit?

    • 440

    • 886HT

    • 891

    • 491

    Correct Answer
    A. 891
    Explanation
    The rotary unit with the highest pressure limit is the 891.

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  • 34. 

    Which rotary unit is designed to fit the ISO En12756 L1K pump dimensions?

    • 491

    • 891

    • 440

    • 886HT

    Correct Answer
    A. 491
  • 35. 

    The 891 can only be used with the 714 and 777 stationary units.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement suggests that the 891 can only be used with the 714 and 777 stationary units. However, the answer is false, indicating that this statement is incorrect. It means that the 891 can be used with other units, not just the 714 and 777 stationary units.

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  • 36. 

    What is a main differences between a 180 and S10 Single Cartridge Seal?

    • Stationary versus Rotary Seal

    • Multiport versus Single Port Flush

    • Cassette versus Cartridge

    • Monolithic versus Composite Seal Face

    Correct Answer
    A. Cassette versus Cartridge
    Explanation
    The main difference between a 180 and S10 Single Cartridge Seal is that the 180 uses a cassette design, while the S10 uses a cartridge design. A cassette seal typically consists of multiple components that are assembled together, while a cartridge seal is a self-contained unit that can be easily installed and replaced.

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  • 37. 

    What is a main difference between the 155 and the 150 Seal?

    • Single seal versus a dual seal

    • Split seal versus a cassette seal

    • Flush Quench and Drain versus Flush only

    • Rotary versus Stationary

    Correct Answer
    A. Rotary versus Stationary
    Explanation
    The main difference between the 155 and the 150 Seal is that the 155 Seal is rotary, meaning it rotates with the shaft, while the 150 Seal is stationary, meaning it remains fixed in place.

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  • 38. 
    If L1 = 2.000 inches, L2 = 3.000 Inches, L3 = 2.250 inches, D1 = 1.500 Inches, D2 =1.875 Inches, D3 = 2.875 inches, D5 = .375 inches, D4 = 4.500 inches will a S10 fit this seal chamber? Note D dimensions are shown as a radius, but are expressed as diameters. - ProProfs

    If L1 = 2.000 inches, L2 = 3.000 Inches, L3 = 2.250 inches, D1 = 1.500 Inches, D2 =1.875 Inches, D3 = 2.875 inches, D5 = .375 inches, D4 = 4.500 inches will a S10 fit this seal chamber? Note D dimensions are shown as a radius, but are expressed as diameters.

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    The S10 will fit this seal chamber because the diameter of D4 (4.500 inches) is greater than the sum of the diameters of D1, D2, D3, D5, and twice the length of L1, L2, and L3.

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  • 39. 

    Which seal model offers a cassette which can be replaced to repair the seal?

    • 180

    • 155

    • S10

    • 150

    Correct Answer
    A. S10
    Explanation
    The S10 seal model offers a cassette which can be replaced to repair the seal.

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  • 40. 

    Which seal model below is defined as a rotary seal?

    • 180

    • 155

    • S10

    • 150

    Correct Answer
    A. 150
    Explanation
    The seal model 150 is defined as a rotary seal because it is the only option provided that fits the description. The other options do not specify any type of seal, so it can be inferred that they are not rotary seals.

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  • 41. 

    Which seal model below offers an adjustable gland?

    • 180

    • 155

    • S10

    • 150

    Correct Answer
    A. 155
    Explanation
    The seal model 155 offers an adjustable gland.

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  • 42. 

    Which cartridge/cassette seal in 1.875 inch shaft size offers the lowest price when using CB/SC FKM materials?

    • 180

    • 155

    • S10

    • 150

    Correct Answer
    A. 150
    Explanation
    The answer is 150 because it offers the lowest price when using CB/SC FKM materials for a 1.875 inch shaft size. This implies that the other options (180, 155, and S10) either have higher prices or are not compatible with the specified materials or shaft size.

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  • 43. 

    What is the main difference between the 280 and the 255 dual cartridge mechanical seal?

    • The 280 has a higher pressure rating

    • The 255 is monolithic

    • The 280 has a pumping ring

    • The 280 uses direct centering

    Correct Answer
    A. The 280 uses direct centering
    Explanation
    The main difference between the 280 and the 255 dual cartridge mechanical seal is that the 280 uses direct centering. This means that the 280 seal is designed to align itself automatically, ensuring proper sealing and reducing the risk of leakage. On the other hand, the 255 seal does not have this feature, and therefore may require manual alignment.

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  • 44. 

    What is the main difference between an S20 and a 250 mechanical seal?

    • Cassette versus Cartridge

    • Both are tandem seals

    • Dual seal versus split seal

    • Two barrier fluid ports versus 8 barrier ports

    Correct Answer
    A. Cassette versus Cartridge
    Explanation
    The main difference between an S20 and a 250 mechanical seal is that the S20 uses a cassette seal design, while the 250 uses a cartridge seal design. A cassette seal is a type of seal where all the components are pre-assembled and housed in a single unit, making it easier to install and replace. On the other hand, a cartridge seal is a type of seal where the components are individually assembled and then inserted into a cartridge, providing more flexibility in terms of customization and maintenance.

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  • 45. 
    If L1 = 1.000 inches, L2 = 3.000 Inches, D2 =1.875 Inches, D3 = 2.875 inches, D5 = .375 inches, D4 = 4.500 inches will a S20 fit this seal chamber? Note - D dimensions are shown as radius, but are expressed as diameter dimension. - ProProfs

    If L1 = 1.000 inches, L2 = 3.000 Inches, D2 =1.875 Inches, D3 = 2.875 inches, D5 = .375 inches, D4 = 4.500 inches will a S20 fit this seal chamber? Note - D dimensions are shown as radius, but are expressed as diameter dimension.

    • Yes

    • No

    Correct Answer
    A. No
  • 46. 

    Which is not an O-ring size used in a S20 -15 (1.875 inch) dual seal?

    • -136

    • -134

    • -141

    • -137

    Correct Answer
    A. -137
    Explanation
    The given answer, -137, is not an O-ring size used in a S20-15 (1.875 inch) dual seal. This implies that the other options, -136, -134, and -141, are all valid O-ring sizes for this specific seal.

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  • 47. 

    Which mechanical seal model can be used with a 550 Psig barrier fluid?

    • 250

    • 255

    • 280

    • 225

    Correct Answer
    A. 225
    Explanation
    The correct answer is 225 because it is the only mechanical seal model listed that can be used with a 550 Psig barrier fluid.

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  • 48. 

    Which mechanical seal models are designed to allow motion?

    • 225 and S20

    • 250 and S20

    • 255 and 280

    • S20 and S10

    Correct Answer
    A. 255 and 280
    Explanation
    The mechanical seal models 255 and 280 are designed to allow motion.

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  • 49. 

    The least expensive Chesterton dual mechanical seal is the 250.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given statement states that the least expensive Chesterton dual mechanical seal is the 250. This means that among all the Chesterton dual mechanical seals available, the 250 model is the most affordable option. Therefore, the statement is true.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 22, 2014
    Quiz Created by
    Awglobaltrain

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