Questions on Pressure Units and Conversions
Multiple-Choice Questions – Pressure Units and Conversions
1. Which of the following is not a unit of pressure?
A) Pascal (Pa)
B) Atmosphere (atm)
C) Torr
D) Kelvin (K)
E) Millimeters of mercury (mmHg)
2. 1 atmosphere (atm) is equal to how many mmHg?
A) 101.3 mmHg
B) 1.00 mmHg
C) 273 mmHg
D) 760 mmHg
E) 1000 mmHg
3. Which of these values equals 1 atm?
A) 760 Torr
B) 101,325 Pa
C) 1.013 × 10⁵ Pa
D) 101.3 kPa
E) All of the above
4. The SI unit of pressure is:
A) Torr
B) atm
C) bar
D) Pascal
E) mmHg
5. 1 atm is approximately equal to how many kPa?
A) 1.0 kPa
B) 10.0 kPa
C) 100.0 kPa
D) 101.3 kPa
E) 1000 kPa
6. Convert 1520 mmHg to atm.
A) 1.0 atm
B) 2.0 atm
C) 3.0 atm
D) 4.0 atm
E) 5.0 atm
7. Which conversion is correct?
A) 1 atm = 1.0 Pa
B) 1 atm = 760 Pa
C) 1 atm = 101.3 Pa
D) 1 atm = 101,325 Pa
E) 1 atm = 273 Pa
8. How many Pascals are in 760 mmHg?
A) 101.3 Pa
B) 101,325 Pa
C) 760 Pa
D) 10,132.5 Pa
E) 1,000,000 Pa
9. Which unit is commonly used in meteorology to measure atmospheric pressure?
A) Newton
B) Celsius
C) Bar
D) Volt
E) Joule
10. 1 bar is approximately equal to:
A) 760 atm
B) 100 kPa
C) 1.013 atm
D) Both B and C
E) 1 mmHg
11. Convert 2.5 atm to kPa.
A) 25.0 kPa
B) 101.3 kPa
C) 202.6 kPa
D) 253.25 kPa
E) 404.6 kPa
12. What is 500 mmHg in atm?
A) 0.66 atm
B) 1.33 atm
C) 0.5 atm
D) 2.0 atm
E) 3.5 atm
13. If a gas has a pressure of 202.6 kPa, how many atm is this?
A) 0.5 atm
B) 1.0 atm
C) 1.5 atm
D) 2.0 atm
E) 2.5 atm
14. Which unit is defined as one newton per square meter?
A) Torr
B) atm
C) mmHg
D) Pa
E) bar
15. 1 Torr is equivalent to:
A) 1 mmHg
B) 1 atm
C) 100 Pa
D) 101.3 kPa
E) 760 mmHg
16. What pressure corresponds to 0.5 atm in mmHg?
A) 101.3 mmHg
B) 760 mmHg
C) 380 mmHg
D) 273 mmHg
E) 500 mmHg
17. 400 kPa is equivalent to how many atm?
A) 1.0 atm
B) 2.0 atm
C) 3.0 atm
D) 3.95 atm
E) 4.5 atm
18. Which of the following pressures is not equivalent to 1 atm?
A) 760 mmHg
B) 760 Torr
C) 101.3 kPa
D) 1.013 × 10⁵ Pa
E) 100 Pa
19. Convert 0.75 atm to kPa.
A) 50.0 kPa
B) 75.0 kPa
C) 101.3 kPa
D) 151.95 kPa
E) 303.9 kPa
20. Which of the following statements is true?
A) Pressure and force are the same
B) kPa is larger than atm
C) 1 atm = 1 Pa
D) Pressure depends on area
E) 1 Torr = 10 mmHg
Answers and Explanations
1. D – Kelvin is a unit of temperature, not pressure.
2. D – 1 atm = 760 mmHg.
3. E – All listed values are equivalent to 1 atm.
4. D – The SI unit of pressure is the Pascal (Pa).
5. D – 1 atm = 101.3 kPa.
6. B – 1520 mmHg ÷ 760 = 2.0 atm.
7. D – 1 atm = 101,325 Pa is the correct SI conversion.
8. B – 760 mmHg = 101,325 Pa.
9. C – Meteorology often uses bars and millibars.
10. D – 1 bar ≈ 100 kPa and ≈ 1.013 atm.
11. D – 2.5 × 101.3 = 253.25 kPa.
12. A – 500 mmHg ÷ 760 = 0.66 atm.
13. D – 202.6 ÷ 101.3 = 2.0 atm.
14. D – 1 Pa = 1 N/m².
15. A – 1 Torr = 1 mmHg by definition.
16. C – 0.5 × 760 = 380 mmHg.
17. D – 400 ÷ 101.3 ≈ 3.95 atm.
18. E – 100 Pa is too low; 1 atm = 101,325 Pa.
19. D – 0.75 × 101.3 = 75.975 ≈ 76 kPa.
20. D – Pressure = force ÷ area, so it depends on area.
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