Mechanical Engineering Exam > Mechanical Engineering Questions > Consider the following statements:1.Volumetri...
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Consider the following statements:
1. Volumetric efficiency of supercharged engine is between 100-110%.
2. Supercharging is normally done in racing cars.
3. Supercharging is of vital importance where weight and space are important.
1. Volumetric efficiency of supercharged engine is between 100-110%.
2. Supercharging is normally done in racing cars.
3. Supercharging is of vital importance where weight and space are important.
Which of these statements are correct ?
- a)1,2 and 3
- b)1 and 2
- c)2 and 3
- d)1 and 3
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Consider the following statements:1.Volumetric efficiency of superchar...
• In practice, racing car engines use supercharging.
• Supercharging is important in marine and automotive engine where weight and space are important.
• Supercharging is important in marine and automotive engine where weight and space are important.
Most Upvoted Answer
Consider the following statements:1.Volumetric efficiency of superchar...
Statement 1: Volumetric efficiency of supercharged engine is between 100-110%
The volumetric efficiency of an engine is a measure of how effectively it can intake and exhaust air. It is defined as the ratio of the actual amount of air inducted into the cylinder to the theoretical maximum amount of air that could be inducted if the cylinder were operating at atmospheric pressure.
In a naturally aspirated engine, the volumetric efficiency is typically around 80-90%, as the engine relies on atmospheric pressure to fill the cylinder with air. However, in a supercharged engine, the intake air is pressurized by a compressor before entering the cylinder, allowing for a greater mass of air to be inducted. This results in a higher volumetric efficiency, typically ranging from 100-110%.
Statement 2: Supercharging is normally done in racing cars
Supercharging is a method of forced induction that is commonly used in racing cars. By compressing the intake air, a supercharger increases the amount of oxygen available for combustion, resulting in increased power output. Racing cars often require high power-to-weight ratios and quick acceleration, which can be achieved through supercharging.
However, it is important to note that supercharging is not exclusively limited to racing cars. It can also be found in high-performance road cars and even some commercial vehicles where increased power is desired. Superchargers are also used in certain aircraft engines to compensate for the loss of power at high altitudes.
Statement 3: Supercharging is of vital importance where weight and space are important
Supercharging can be of vital importance in applications where weight and space are significant factors. Compared to other methods of forced induction, such as turbocharging, superchargers tend to be more compact and lightweight. This makes them suitable for installations where space is limited, such as in small vehicles or tight engine compartments.
Additionally, supercharging can provide immediate power delivery, as the compressor is directly driven by the engine. This can be advantageous in applications where quick acceleration is required, such as in racing cars or emergency response vehicles.
Overall, all three statements are correct. The volumetric efficiency of a supercharged engine is typically between 100-110%, supercharging is commonly used in racing cars, and it can be of vital importance in applications where weight and space are important.
The volumetric efficiency of an engine is a measure of how effectively it can intake and exhaust air. It is defined as the ratio of the actual amount of air inducted into the cylinder to the theoretical maximum amount of air that could be inducted if the cylinder were operating at atmospheric pressure.
In a naturally aspirated engine, the volumetric efficiency is typically around 80-90%, as the engine relies on atmospheric pressure to fill the cylinder with air. However, in a supercharged engine, the intake air is pressurized by a compressor before entering the cylinder, allowing for a greater mass of air to be inducted. This results in a higher volumetric efficiency, typically ranging from 100-110%.
Statement 2: Supercharging is normally done in racing cars
Supercharging is a method of forced induction that is commonly used in racing cars. By compressing the intake air, a supercharger increases the amount of oxygen available for combustion, resulting in increased power output. Racing cars often require high power-to-weight ratios and quick acceleration, which can be achieved through supercharging.
However, it is important to note that supercharging is not exclusively limited to racing cars. It can also be found in high-performance road cars and even some commercial vehicles where increased power is desired. Superchargers are also used in certain aircraft engines to compensate for the loss of power at high altitudes.
Statement 3: Supercharging is of vital importance where weight and space are important
Supercharging can be of vital importance in applications where weight and space are significant factors. Compared to other methods of forced induction, such as turbocharging, superchargers tend to be more compact and lightweight. This makes them suitable for installations where space is limited, such as in small vehicles or tight engine compartments.
Additionally, supercharging can provide immediate power delivery, as the compressor is directly driven by the engine. This can be advantageous in applications where quick acceleration is required, such as in racing cars or emergency response vehicles.
Overall, all three statements are correct. The volumetric efficiency of a supercharged engine is typically between 100-110%, supercharging is commonly used in racing cars, and it can be of vital importance in applications where weight and space are important.
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Consider the following statements:1.Volumetric efficiency of supercharged engine is between 100-110%.2.Supercharging is normally done in racing cars.3.Supercharging is of vital importance where weight and space are important.Which of these statements are correct ?a)1,2 and 3b)1 and 2c)2 and 3d)1 and 3Correct answer is option 'A'. Can you explain this answer?
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