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Which of the following statements are correct for multi staging in a reciprocating air compressor?
1.It decreases the volumetric efficiency.  
2.The work done can be reduced.  
3. small high-pressure cylinder is required.  
4.The size of flywheel is reduced. 
Select the correct answer using the codes given below 
  • a)
    1, 2 and 3  
  • b)
    2, 3 and 4  
  • c)
    1, 3 and 4  
  • d)
    1, 2 and 4 
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following statements are correct for multi staging in a r...
1 is false, it increases the volumetric efficiency. 
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Most Upvoted Answer
Which of the following statements are correct for multi staging in a r...
The correct answer is option 'B': 2, 3, and 4.

Multi staging in a reciprocating air compressor refers to the use of multiple cylinders in the compressor to achieve higher overall pressure ratios. Let's explore each statement and see why options 2, 3, and 4 are correct.

1. It decreases the volumetric efficiency:
Volumetric efficiency is the ratio of the actual volume of air delivered by the compressor to the theoretical volume of air that should be delivered. In a multi-stage compressor, the air is compressed in stages, with each stage increasing the pressure of the air. This increased pressure reduces the volume of air that can be delivered, resulting in a decrease in volumetric efficiency.

2. The work done can be reduced:
In a multi-stage compressor, the work done to compress the air is distributed across multiple stages. Each stage compresses the air to a certain pressure level, reducing the overall work required in a single stage. By distributing the work, the total work done by the compressor can be reduced, leading to higher efficiency.

3. A small high-pressure cylinder is required:
In a multi-stage compressor, the air is compressed in stages, with each stage increasing the pressure. As the pressure increases, the size of the cylinders can be reduced. This is because higher pressures can be achieved with smaller cylinders, resulting in a more compact design. Therefore, a small high-pressure cylinder is required in a multi-stage compressor.

4. The size of the flywheel is reduced:
The flywheel is a rotating mass used to store energy and smooth out the variations in torque produced by the reciprocating motion of the compressor. In a multi-stage compressor, the work is distributed across multiple cylinders, which reduces the torque variations. As a result, the size of the flywheel can be reduced since it doesn't need to compensate for large torque fluctuations.

In conclusion, options 2, 3, and 4 are correct for multi staging in a reciprocating air compressor. The work done can be reduced, a small high-pressure cylinder is required, and the size of the flywheel is reduced.
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Which of the following statements are correct for multi staging in a reciprocating air compressor?1.It decreases the volumetric efficiency. 2.The work done can be reduced. 3. small high-pressure cylinder is required. 4.The size of flywheel is reduced.Select the correct answer using the codes given belowa)1, 2 and 3 b)2, 3 and 4 c)1, 3 and 4 d)1, 2 and 4Correct answer is option 'B'. Can you explain this answer?
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