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/m^{2}

c) Kg/m^{2}

d) Torr

View answer

Explanation: Pressure is force per unit area so Kg/m

^{2}cannot be a unit of pressure.

2. What is the value of 760 Torr in Pascal?

a) 1.01325 X 10^{5}

b) 6.025 X 10^{5}

c) 12.05 X 10^{4}

d) 3.0125 X 10^{5}

View answer

Explanation: 760 Torr = 1 atm = 1.01325 X 10

^{5}.

3. How many Pascal does 1 bar have?

a) 10^{4}

b) 10^{5}

c) 10^{6}

d) 10^{7}

View answer

Explanation: 1 bar = 100 kPa = 10

^{5}Pa.

4. Which of the following equals 760 mm of Hg?

a) 1 atm

b) 1 Pa

c) 1 bar

d) 1 torr

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

View answer

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

**Sanfoundry Global Education & Learning Series – Basic Chemical Engineering.**

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