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All questions of Conversion of Units from one System to another System for UPSC CSE Exam

Which of the following is the correct conversion factor to convert pounds per square inch to kilopascals?
  • a)
    0.0069
  • b)
    0.1
  • c)
    1
  • d)
    6.8948
Correct answer is option 'A'. Can you explain this answer?

Garima Datta answered
Understanding Pressure Units
To convert pounds per square inch (psi) to kilopascals (kPa), it’s essential to understand the relationship between these units.

Pressure Conversion Basics
- **1 psi** is equivalent to **6.89476 kPa**.
- Therefore, to convert psi to kPa, you multiply the psi value by 6.89476.

Conversion Factor Explanation
- To find the conversion factor from psi to kPa, you take the reciprocal of 6.89476:
- \[ \text{Conversion Factor} = \frac{1}{6.89476} \approx 0.145 \]
However, the options provided include a factor that seems to reflect the reciprocal of the conversion from kPa to psi instead.

Analyzing the Options
- **Option A: 0.0069** - This option does not accurately represent the conversion factor for psi to kPa, as it is significantly lower than the correct reciprocal.
- **Option D: 6.8948** - This is the correct conversion for psi to kPa.

Conclusion
The correct answer should be **Option D (6.8948)**, as this represents how many kilopascals are in one pound per square inch.
To summarize:
- **1 psi = 6.89476 kPa**, hence **to convert psi to kPa, multiply by 6.89476**.
- The provided option **A (0.0069)** is incorrect for this conversion.
Always ensure to verify conversion factors for accurate results in calculations!

The conversion factor to convert centimeters to meters is:
  • a)
    0.01
  • b)
    0.1
  • c)
    1
  • d)
    10
Correct answer is option 'A'. Can you explain this answer?

To convert from centimeters to meters, you multiply by 0.01 since there are 0.01 meters in 1 centimeter.

The conversion factor to convert fluid ounces to milliliters is approximately:
  • a)
    0.01
  • b)
    0.1
  • c)
    1
  • d)
    29.57
Correct answer is option 'D'. Can you explain this answer?

To convert from fluid ounces to milliliters, you multiply by 29.57 approximately since there are 29.57 milliliters in 1 fluid ounce.

What is the conversion factor to convert square meters to square feet?
  • a)
    0.1
  • b)
    0.3048
  • c)
    1
  • d)
    3.2808
Correct answer is option 'D'. Can you explain this answer?

To convert from square meters to square feet, you multiply by 3.2808 approximately since there are 3.2808 square feet in 1 square meter.

Which of the following is the correct conversion factor to convert kilometers per hour to meters per second?
  • a)
    0.1
  • b)
    0.2778
  • c)
    1
  • d)
    3.6
Correct answer is option 'B'. Can you explain this answer?

To convert from kilometers per hour to meters per second, you multiply by 0.2778 approximately since there are 0.2778 meters per second in 1 kilometer per hour.

What is the conversion factor to convert liters to cubic meters?
  • a)
    0.001
  • b)
    0.01
  • c)
    0.1
  • d)
    1
Correct answer is option 'A'. Can you explain this answer?

To convert from liters to cubic meters, you multiply by 0.001 since there are 0.001 cubic meters in 1 liter.

The conversion factor to convert pounds to kilograms is approximately:
  • a)
    0.5
  • b)
    2.2
  • c)
    0.45
  • d)
    2.5
Correct answer is option 'C'. Can you explain this answer?

To convert from pounds to kilograms, you multiply by 0.45 approximately since there are 0.45 kilograms in 1 pound.

What is the conversion factor to convert Celsius to Fahrenheit?
  • a)
    0.01
  • b)
    0.1
  • c)
    1
  • d)
    1.8
Correct answer is option 'D'. Can you explain this answer?

To convert from Celsius to Fahrenheit, you multiply by 1.8 and add 32 since the relationship between the two scales is given by the formula F = (C * 1.8) + 32.

What is the conversion factor to convert square yards to square meters?
  • a)
    0.01
  • b)
    0.8361
  • c)
    1
  • d)
    1.196
Correct answer is option 'B'. Can you explain this answer?

To convert from square yards to square meters, you multiply by 0.8361 approximately since there are 0.8361 square meters in 1 square yard.

The conversion factor to convert acres to square meters is approximately:
  • a)
    4,046.86
  • b)
    10,000
  • c)
    40,468.56
  • d)
    100,000
Correct answer is option 'A'. Can you explain this answer?

To convert from acres to square meters, you multiply by 4,046.86 approximately since there are 4,046.86 square meters in 1 acre.

Which of the following is the correct conversion factor to convert meters per second to kilometers per hour?
  • a)
    0.01
  • b)
    0.1
  • c)
    1
  • d)
    3.6
Correct answer is option 'D'. Can you explain this answer?

To convert from meters per second to kilometers per hour, you multiply by 3.6 since there are 3.6 kilometers per hour in 1 meter per second.

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