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MOCK TEST 5
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Question 1 of 5
1. Question
1 pointsCategory: MECHANICAL OPERATIONSWhich of the following works on principle of compression and impact?
Correct
Answer: b
Explanation: The gyratory crusher involves the operation of both compression and impact at the same time, while jaw crusher only applies compression.Incorrect
Answer: b
Explanation: The gyratory crusher involves the operation of both compression and impact at the same time, while jaw crusher only applies compression. -
Question 2 of 5
2. Question
1 pointsCategory: MECHANICAL OPERATIONSWhich of the following involves impact and attrition operations?
Correct
Answer: c
Explanation: The hammer mill uses the principle of impact and attrition operations for size reduction, while jaw and rod mill are based on the compression techniques.Incorrect
Answer: c
Explanation: The hammer mill uses the principle of impact and attrition operations for size reduction, while jaw and rod mill are based on the compression techniques. -
Question 3 of 5
3. Question
1 pointsCategory: MECHANICAL OPERATIONSHow can be the angle of nip calculated?
where R and r are the radius of feed particle and the roll and d is the diameter of largest possible product.
Correct
Answer: a
Explanation: The angle of nip i.e. cos α = r+d/r+R, where R and r are the radius of feed particle and the roll and d is the diameter of largest possible product.Incorrect
Answer: a
Explanation: The angle of nip i.e. cos α = r+d/r+R, where R and r are the radius of feed particle and the roll and d is the diameter of largest possible product. -
Question 4 of 5
4. Question
1 pointsCategory: MECHANICAL OPERATIONSWhat is the angle of nip for ball mill?
Correct
Answer: c
Explanation: The angle of nip for a ball mill cos α is defined as 4π2n2 (R-r)/g, Where n is the speed of the rotation of the ball mill.Incorrect
Answer: c
Explanation: The angle of nip for a ball mill cos α is defined as 4π2n2 (R-r)/g, Where n is the speed of the rotation of the ball mill. -
Question 5 of 5
5. Question
1 pointsCategory: MECHANICAL OPERATIONSThe fluid energy mill involves __________
Correct
Answer: a
Explanation: The fluid energy mill usually uses compressed air and super-heated steam admitted at a pressure of 7 atm through nozzles.Incorrect
Answer: a
Explanation: The fluid energy mill usually uses compressed air and super-heated steam admitted at a pressure of 7 atm through nozzles.