Chemical Engineering Questions and Answers – Pressure Units

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This set of Basic Chemical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Pressure Units”.

1. Which of the following is not a unit of pressure?
a) Bar
b) N/m2
c) Kg/m2
d) Torr

Explanation: Pressure is force per unit area so Kg/m2 cannot be a unit of pressure.

2. What is the value of 760 Torr in Pascal?
a) 1.01325 X 105
b) 6.025 X 105
c) 12.05 X 104
d) 3.0125 X 105

Explanation: 760 Torr = 1 atm = 1.01325 X 105.

3. How many Pascal does 1 bar have?
a) 104
b) 105
c) 106
d) 107

Explanation: 1 bar = 100 kPa = 105 Pa.
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4. Which of the following equals 760 mm of Hg?
a) 1 atm
b) 1 Pa
c) 1 bar
d) 1 torr

Explanation: 760 mm of Hg = 101.325 kPa = 1 atm.

5. 1 psi equals how many kilopascal?
a) 5.249
b) 6.894
c) 7.489
d) 8.846

Explanation: 1 psi = 6894 Pa = 6.894 kPa.

6. What is the pressure of 50 kPa in bars?
a) 0.25
b) 0.5
c) 1
d) 2

Explanation: Pressure = 50/100 = 0.5 bar.

7. What is the pressure of 200 kPa in bars?
a) 0.25
b) 0.5
c) 1
d) 2

Explanation: Pressure = 200/100 = 2 bar.

8. What is the pressure of 380 torr in atm?
a) 0.5
b) 1
c) 2
d) 4

Explanation: Pressure = 380/760 = 0.5 atm.

9. What is the pressure of 190 torr in atm?
a) 0.25
b) 0.5
c) 0.8
d) 1

Explanation: Pressure = 190/760 = 0.25 atm.

10. What is the pressure of 38 mm Hg in atm?
a) 0.05
b) 0.5
c) 1
d) 5

Explanation: Pressure = 38/760 = 0.05 atm.

11. What is the pressure of 1900 mm Hg in atm?
a) 0.5
b) 1
c) 1.5
d) 2.5

Explanation: Pressure = 1900/760 = 2.5 atm.

12. What is the pressure of 19 mm Hg in pascal?
a) 1012
b) 2533
c) 3654
d) 6412

Explanation: Pressure = 19/760*101325 = 2533 Pa.

13. What is the pressure of 38 mm Hg in Torr?
a) 0.05
b) 0.5
c) 1
d) 38

Explanation: Pressure = 38 Torr.

14. What is the pressure of 380 Torr in bar?
a) 0.13
b) 0.49
c) 0.5
d) 1

Explanation: Pressure = 380/760*100000/101325 = 0.49 bar.

15. What is the pressure of 1900 Torr in bar?
a) 2.1
b) 2.3
c) 2.4
d) 2.5

Explanation: Pressure = 1900/760*100000/101325 = 2.4 bar.

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