Chemical Process Calculation Questions and

Terminology

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The temperature reaches at equilibrium for the vaporization of a small amount of water in to a large amount of air.
Dry bulb temperature
Wet bulb temperature
Standard temperature
None of the mentioned
Explanation:
The temperature reach at equilibrium for the vaporization of a small amount of water in to a large amount of air is called wet bulb temperature.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Announcement is made on radio that the temperature is 25 degree Celsius and the relative humidity is 65%.
0.45
0.65
0.85
None of the mentioned
Explanation:
p(H2O)/p*(H2O) = %R.H./100.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The mass of water vapour per unit mass of bone dry air is called
Relative saturation
Relative Humidity
Humidity
None of the mentioned
Explanation:
The mass of water vapour per unit mass of bone dry air is called Humidity.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The heat capacity of an air-water vapour mixture per mass of bone dry air is called humid heat.
Correct
Incorrect
Partially correct
None of the mentioned
Explanation:
The heat capacity of an air-water vapour mixture per mass of bone dry air is called Humid heat.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The ratio of partial pressure of the vapour in the gas mixture and the vapour pressure of the vapour component is called
Relative Humidity
Humidity
Dry air pressure
None of the mentioned
Explanation:
The ratio of partial pressure of the vapour in the gas mixture and the vapour pressure of the vapour component is called Relative Humidity.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
When the partial pressure of the vapour in the gas is same as the vapour pressure of the substance. What is the relative saturation?
0%
50%
100%
None of the mentioned
Explanation:
100% relative saturation means the partial pressure of the vapour in the gas is same as the vapour pressure of the substance.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Measurements of p(H2O) & p*(H2O) have been made at 25 degree celsius.
Incorrect
Correct
Depends on other conditions as well
None of the mentioned
Explanation:
Measurements of p(H2O) & p*(H2O) have been made at 25 degree celsius.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The usual temperature of a gas or liquid is
Dry bulb temperature
Wet bulb temperature
Standard temperature
None of the mentioned
Explanation:
The usual temperature of a gas or liquid is dry bulb temperature.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Zero percent relative saturation means
100 % vapour in the air
75% vapour in the air
50% vapour in the air
No vapour in the air
Explanation:
Zero percent relative saturation means no vapour in the air.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The volume of air including the water vapour per mass of bone dry air.
Humid volume
Critical volume
Standard volume
None of the mentioned
Explanation:
The volume of air including the water vapour per mass of bone dry air humid volume.