Download GTU BE/B.Tech 2019 Summer 6th Sem New 2162603 Rubber Equipment Design I Question Paper

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Subject Code:2162603

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GUJARAT TECHNOLOGICAL UNIVERSITY

SEMESTER-VI(NEW) — EXAMINATION — SUMMER 2019

Subject Name:Rubber Equipment Design-I

Time:10:30 AM TO 01:00 PM

Instructions:

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. List the factors on which batch size of mixing mill depends. (03)

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2. Justify the statement that “Roll speed tends to decrease with increase in roll diameter.” (04)
3. State the importance of cross mixing. Short note on “cross mixing devices”. (07)

Q.2

1. Write about the jacket for high pressure vessels. (03)
2. Describe the ‘Shrink-fit’ and ‘Autofrettage’ type of constructions for high pressure vessels. (04)

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3. Explain the Bridgeman closure and Delta-ring closure in detail. (07)

OR

1. Discuss about the Uhde-Bredtschneider closure and Double-cone seal ring closure with appropriate diagram. (07)

Q.3

1. What are the probable causes and possible solutions when stock temperature rises too quickly in internal mixer? (03)

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2. Write the advantages and disadvantages of internal mixer. (04)
3. Write the importance of rotor shaft seals used in internal mixer. Discuss the different designs of the same. (07)

OR

1. Compare the drop door and old type sliding door used as discharge door for internal mixer. (03)
2. Describe in detail about ZZ, geometry for internal mixer. (04)

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3. Explain in detail about heat transfer in internal mixer. (07)

Q.4

1. What is the purpose of installing roll-preloading device? How does it work? (03)
2. Write a brief note on roll-heating/cooling devices for calender. (04)
3. Explain in detail about different types of roll configurations for calender. (07)

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OR

1. Which major requirements should be fulfilled by calender rolls? (03)
2. Describe the construction and working of roll cross-axis device. (04)
3. Write a short-note on roll bearings. (07)

Q.5

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1. Give the detailed description for the mechanical press having following designation: SV A2-1000+ 600—1800x 1600 (03)
2. Which law is responsible for the working mechanism of hydraulic press? Describe in brief about the same. (04)
3. Explain in detail about any four ram driving mechanism with diagram. (07)

Date:16/05/2019

Total Marks: 70

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OR

Q.5

1. Write in brief about gap frame press. (03)
2. Which points should be taken into consideration while selecting a press? (04)

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3. A Hydraulic press has a ram of 12 cm diameter & plunger of 1.5 cm diameter. Determine the load lifted if a force of 294.3 N is applied to the plunger. If the plunger has a stroke of 20 cm, how many strokes will be required to lift weight by 0.50 m? Also calculate the volume of additional liquid required & the power of motor driving the plunger if the time taken by the press is 15 minutes. (07)

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