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Mo Internal Question-1

This document is an internal exam paper for the Mechanical Operation course at Government Polytechnic, Jagatsinghpur, aimed at 2nd year Chemical Engineering students. It consists of six questions covering topics such as power requirements for crushing limestone, roll crusher specifications, intermediate crushers, circuit types, size reduction laws, and critical speed. The total marks for the exam are 20, and students are required to answer all questions within one hour.

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Sushanta Behera
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67 views1 page

Mo Internal Question-1

This document is an internal exam paper for the Mechanical Operation course at Government Polytechnic, Jagatsinghpur, aimed at 2nd year Chemical Engineering students. It consists of six questions covering topics such as power requirements for crushing limestone, roll crusher specifications, intermediate crushers, circuit types, size reduction laws, and critical speed. The total marks for the exam are 20, and students are required to answer all questions within one hour.

Uploaded by

Sushanta Behera
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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GOVERNMENT POLYTECHNIIC, JAGATSINGHPUR

SUB: MECHANICAL OPERATION (CHT 303), 2ND YEAR CHEMICAL ENGG.


3RD SEMESTER INTERNAL EXAM-1
Time: 1 hr Answer all the question Total Marks: 20

1. What wil1 be the power required to crush 150 tonnes per hour of limestone if 80 percent of the feed (3)
passes 50 mm screen and 80 percent of the product a 3•125 mm screen? Work index of limestone = 12•74.
2. A slaked lime manufacturing used a roll crusher to crush the lime stone (Sp. Gravity = 2.66). The crushing (5)
have rolls of 150 cm as a diameter by width 50 cm and the clearance between the roll is 1cm. The roller
run 100 rpm and the angle of nip is 30°. Find out the maximum feed size to the crusher?
Find the theoretical capacity of the crushing roll?
3. Write four intermediate crusher? (2)
4. State open and closed circuit. (2)
5. What is size reduction and explain the laws of Comminution? (6)
6. What is critical speed and Write the formula of critical speed and define its each term? (2)

GOVERNMENT POLYTECHNIIC, JAGATSINGHPUR


SUB: MECHANICAL OPERATION (CHT 303), 2ND YEAR CHEMICAL ENGG.
3RD SEMESTER INTERNAL EXAM-1
Time: 1 hr Answer all the question Total Marks: 20

1. What wil1 be the power required to crush 150 tonnes per hour of limestone if 80 percent of the feed (3)
passes 50 mm screen and 80 percent of the product a 3•125 mm screen? Work index of limestone = 12•74.
2. A slaked lime manufacturing used a roll crusher to crush the lime stone (Sp. Gravity = 2.66). The crushing (5)
have rolls of 150 cm as a diameter by width 50 cm and the clearance between the roll is 1cm. The roller
run 100 rpm and the angle of nip is 30°. Find out the maximum feed size to the crusher?
Find the theoretical capacity of the crushing roll?
3. Write four intermediate crusher? (2)
4. State open and closed circuit. (2)
5. What is size reduction and explain the laws of Comminution? (6)
6. What is critical speed and Write the formula of critical speed and define its each term? (2)

GOVERNMENT POLYTECHNIIC, JAGATSINGHPUR


SUB: MECHANICAL OPERATION (CHT 303), 2ND YEAR CHEMICAL ENGG.
3RD SEMESTER INTERNAL EXAM-1
Time: 1 hr Answer all the question Total Marks: 20

1. What wil1 be the power required to crush 150 tonnes per hour of limestone if 80 percent of the feed (3)
passes 50 mm screen and 80 percent of the product a 3•125 mm screen? Work index of limestone = 12•74.
2. A slaked lime manufacturing used a roll crusher to crush the lime stone (Sp. Gravity = 2.66). The crushing (5)
have rolls of 150 cm as a diameter by width 50 cm and the clearance between the roll is 1cm. The roller
run 100 rpm and the angle of nip is 30°. Find out the maximum feed size to the crusher?
Find the theoretical capacity of the crushing roll?
3. Write four intermediate crusher? (2)
4. State open and closed circuit. (2)
5. What is size reduction and explain the laws of Comminution? (6)
6. What is critical speed and Write the formula of critical speed and define its each term? (2)

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