Vapor Pressure MCQs : This section focuses on the "Vapor Pressure". These Multiple Choice Questions (MCQs) should be practiced to improve the Vapor Pressure skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Which of the following machines have the possibility of cavitation?
A. Reaction turbines and centrifugal pumps
B. Reaction turbines and reciprocating pumps
C. Impulse turbines and centrifugal pumps
D. Impulse turbines and reciprocating pumps
Question 2
Which of the following is true about vapor pressure of a liquid?
A. Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid
B. Vapor pressure is not affected by molecular activity and temperature of the liquid
C. Vapor pressure is not affected by molecular activity and is independent of the temperature of the liquid
D. Vapor pressure is closely related to molecular activity and temperature of the liquid
Question 3
Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?
A. container 1
B. container 2
C. container 3
D. the vapor pressure of the liquid will remain the same irrespective of itâs temperature
Question 4
The absolute pressure of a water is 0.5kN above it’s vapor pressure. If it flows with a velocity of 1m/s, what will be the value of Cavitation Number describing the flow induced boiling?
A. 0.25
B. 0.5
C. 1
D. 2
Question 5
The three liquids 1, 2, and 3 with vapor pressures V1, V2 and V3 respectively, are kept under same pressure. If V1 > V2 > V3, which liquid will start boiling early?
A. liquid 1
B. liquid 2
C. liquid 3
D. they will start boiling at the same time
Question 6
Which of the following equation correctly depicts the relation between the vapor pressure of a liquid and it’s temperature?
A. Vapor pressure increases linearly with the increase in temperature of the liquid
B. Vapor pressure increases slightly with the increase in temperature of the liquid at low temperatures and the rate of increase goes high at higher temperatures
C. Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures
D. Vapor pressure remains unchanged with the increase in temperature of the liquid
Question 7
Which of the following is correct regarding the formation and collapse of vapor bubbles in a liquid?
A. Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes above the bubble pressure
B. Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes below the bubble pressure
C. Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes below the bubble pressure
D. Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes above the bubble pressure
Question 8
Which of the following is the condition for the boiling of a liquid?
A. Absolute pressure of a liquid must be greater than or equal to it’s vapor pressure
B. Absolute pressure of a liquid must be less than or equal to it’s vapor pressure
C. Absolute pressure of a liquid must be equal to it’s vapor pressure
D. Absolute pressure of a liquid must be greater than it’s vapor pressure
Question 9
Which of the following statement is true about vapor pressure of a liquid?
A. Vapor pressure is closely related to molecular activity and temperature of the liquid
B. Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid
C. Vapor pressure is not affected by molecular activity and temperature of the liquid
D. Vapor pressure is not affected by molecular activity and is independent of the temperature of the liquid
Question 10
Vapor pressure or equilibrium vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature in a closed system.
A. True
B. False
Question 11
Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?
A. container 1
B. container 2
C. container 3
D. the vapor pressure of the liquid will remain the same irrespective of it’s temperature