Engineering Questions with Answers - Multiple Choice Questions

# Separation Processes MCQ’s – Psychrometry-2

1 - Question

If the absolute humidity is 0.03
The mass of moisture free air is 50g
The mass of moisture is 25g
What is the molal humidity?
a) 0.03
b) 0.06
c) 0.04
d) 0.1

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.06.

2 - Question

If the absolute humidity is 0.02
The mass of moisture free air is 50g
The mass of moisture is 25g
What is the molal humidity?
a) 0.03
b) 0.06
c) 0.04
d) 0.1

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.04.

3 - Question

If the absolute humidity is 0.02
The mass of moisture free air is 50g
The mass of moisture is 10g
What is the molal humidity?
a) 0.03
b) 0.06
c) 0.04
d) 0.1

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.1.

4 - Question

If the absolute humidity is 0.03
The mass of moisture free air is 75g
The mass of moisture is 25g
What is the molal humidity?
a) 0.08
b) 0.15
c) 0.09
d) 0.21

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.09.

5 - Question

If the absolute humidity is 0.07
The mass of moisture free air is 48g
The mass of moisture is 16g
What is the molal humidity?
a) 0.08
b) 0.15
c) 0.09
d) 0.21

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.21.

6 - Question

If the absolute humidity is 0.075
The mass of moisture free air is 50g
The mass of moisture is 25g
What is the molal humidity?
a) 0.08
b) 0.15
c) 0.09
d) 0.21

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.15.

7 - Question

If the absolute humidity is 0.04
The mass of moisture free air is 50g
The mass of moisture is 25g
What is the molal humidity?
a) 0.08
b) 0.15
c) 0.09
d) 0.21

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.08.

8 - Question

If the absolute humidity is 0.03
The mass of moisture free air is 40g
The mass of moisture is 10g
What is the molal humidity?
a) 0.08
b) 0.15
c) 0.12
d) 0.21

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.12.

9 - Question

If the absolute humidity is 0.08
The mass of moisture free air is 50g
The mass of moisture is 12.5g
What is the molal humidity?
a) 0.08
b) 0.02
c) 0.32
d) 0.76

Explanation: Combining the formula of absolute humidity H= Mpa/Mb(p-pa) and molal humidity Hm=pa/p=pa, Hm= H*Ma/Mb=0.32

10 - Question

If the absolute humidity is 0.06
The mass of moisture free air is 50g
The mass of moisture is 25g
What is the molal humidity?
a) 0.33
b) 0.12
c) 0.14
d) 0.18