This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Schmidt Number”.
1. What is the value of the Schmidt number for ammonia?
a) 0.78
b) 0.79
c) 0.81
d) 0.82
View Answer
Explanation: Ammonia also known as Azane is a colorless gas with a characteristic pungent smell. It is also used in many commercial cleaning products.
2. What is the value of the Schmidt number for carbon-dioxide?
a) 0.92
b) 0.93
c) 0.94
d) 0.95
View Answer
Explanation: It is a colorless, odorless gas vital to life on earth. This naturally occurring chemical compound is composed of a carbon atom covalently double bonded to two oxygen atoms.
3. What is the dimension of the Schmidt number?
a) Newton
b) Meter
c) Celsius
d) It is a dimensional quantity
View Answer
Explanation: Schmidt number = v/D and it has no dimensions.
4. Which one of the following is having the lowest value of Schmidt number?
a) Oxygen
b) Water
c) Benzene
d) Ethyl alcohol
View Answer
Explanation: Schmidt number of water is 0.60 while that of oxygen, ethyl alcohol and benzene are 0.75, 1.76 and 1.30 respectively.
5. What is the value of the Schmidt number for water?
a) 0.62
b) 0.61
c) 0.60
d) 0.59
View Answer
Explanation: Water is a transparent fluid and its molecules are connected by covalent bonds. It is tasteless and odorless.
6. Schmidt number is given by the formula
a) 2 D/v
b) v/D
c) D/v
d) 2 v/D
View Answer
Explanation: Schmidt number is defined as the ratio of viscosity and mass diffusivity and is used to characterize fluid flows in which there are simultaneous momentum and mass diffusion convection processes.
7. Which one of the following is having the highest value of Schmidt number?
a) Benzene
b) Carbon dioxide
c) Acetic acid
d) Ammonia
View Answer
Explanation: Schmidt number of benzene is 1.78 while that of carbon dioxide, acetic acid and ammonia are 0.78, 1.16 and 0.78 respectively.
8. What is the value of the Schmidt number for acetic acid?
a) 4.16
b) 3.16
c) 2.16
d) 1.16
View Answer
Explanation: It is a colorless liquid and weak acid. It is an important chemical reagent.
9. What is the value of the Schmidt number for benzene?
a) 1.96
b) 1.86
c) 1.76
d) 1.66
View Answer
Explanation: Its molecule is composed of six carbon atoms joined in a ring with one hydrogen atom attached to each carbon atom.
10. Schmidt number is given by
a) German engineer
b) British engineer
c) French engineer
d) American engineer
View Answer
Explanation: It was named after the German engineer Ernst Heinrich Wilhelm Schmidt.
Sanfoundry Global Education & Learning Series – Mass Transfer.
To practice all areas of Mass Transfer, here is complete set of 1000+ Multiple Choice Questions and Answers.
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