Engineering/Chemical Engineering Mcq Question Set 11 Sample Test,Sample questions

Question:
 A container has vapor H2O with partial pressure 9 atm, what is fraction of air in the vessel?

1.0.1

2.0.4

3.0.7

4. 0.9

Posted Date:-2022-03-14 10:08:48


Question:
 A process is carried out for the feed mixture of 95% air and 5% ammonia vapor, the compressor recovered 40% of ammonia, what is the exit pressure of the compressor, if the partial pressure of ammonia vapor is 10 mm Hg?

1. 225.4 mm Hg

2.326.8 mm Hg

3.451.2 mm Hg

4. 593.5 mm Hg

Posted Date:-2022-03-14 10:29:15


Question:
 A system has partial pressure 500 mm Hg and the saturated water vapor has partial pressure 25 mm Hg, what is the fraction of water vapor in the system?

1. 0.01

2.0.05

3. 0.1

4.0.5

Posted Date:-2022-03-14 10:09:20


Question:
 At triple point, vapor pressure of ice is given by ln p* = 18 – 2560/T, and vapor pressure of water is given by ln p* = 28 – 5120/T, what is the temperature at triple point?

1.225 K

2.256 K

3.320 K

4.400 K

Posted Date:-2022-03-14 10:20:10


Question:
 Pressure of a gas at temperature T is P, What is the pressure of the gas at 2T, use B = 1?

1.Pe1/T

2.Pe1/2T

3.Pe1/3T

4. Pe1/4T

Posted Date:-2022-03-14 10:17:18


Question:
 The pressure of a compound at 200 K is 10 mm Hg and at 400 K it is 50 mm Hg, what is the pressure at T = 250 K?

1.18.1 mm Hg

2.24.2 mm Hg

3. 36.3 mm Hg

4.48.4 mm Hg

Posted Date:-2022-03-14 10:23:30


Question:
 What is called the ratio of partial pressure of vapor and partial pressure of the dry gas?

1.Humidity

2. Relative humidity

3.Molal humidity

4.None of the mentioned

Posted Date:-2022-03-14 11:10:46


Question:
 What is the pressure of CO2 at 0oC, molar volume = 4 liter/mole, if B = – 0.053 liter/mole, C = 0.0026 liter2/mole2? (Use virial equation, neglect higher terms)

1.2.4 atm

2. 4.1 atm

3.5.5 atm

4.6.9 atm

Posted Date:-2022-03-14 10:04:53


Question:
 What is the unit of ‘a’ in RK equation?

1.Liter/mole

2.Atm(liter/mole)

3. Atm(liter/mole)K0.5

4.Atm(liter/mole)K

Posted Date:-2022-03-14 10:06:49


Question:
10 KPa of water vapor at 27oC is saturated with air in a system, what is the mole fraction of air?

1.0.21

2.0.46

3. 0.79

4.0.91

Posted Date:-2022-03-14 10:13:40


Question:
100 KPa of water vapor at 27oC is saturated with air in a system, what is the mole fraction of air?

1. 0.230

2. 0.306

3.0.425

4. 0.503

Posted Date:-2022-03-14 10:13:01


Question:
A container has H2 at 27oC and molar volume 1 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of H2? (Use vander waal equation)

1. 7.5 atm

2.12.4 atm

3.15.6 atm

4.17.8 atm

Posted Date:-2022-03-14 10:04:25


Question:
A container has O2 at 5 atm and molar volume 2 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of O2? (Use vander waal equation)

1. 140 K

2.150 K

3.170 K

4.190 K

Posted Date:-2022-03-14 10:03:57


Question:
A container is filled with a gas at 10 atm with molar volume 1 liter/mole, if B = – 0.053 liter/mole, C = 0.0026 liter2/mole2, what is the temperature of gas? (Use virial equation, neglect higher terms)

1.128.2 K

2.156.9 K

3.198.5 K

4.243.6 K

Posted Date:-2022-03-14 10:05:31


Question:
A liquid evaporates first at which of the following conditions?

1.High attraction forces

2.Low attraction forces

3.Low vapor pressure

4. High boiling point

Posted Date:-2022-03-14 10:19:37


Question:
A material’s mass is given by the equation, m = 32P0.02/T0.5, where T is in Kelvin, m is in Kg and P is in mm Hg, what is the mass of material at 127oC, use A = 10, B = 6 X 103 and C = 0?

1.1.44 Kg

2.1.69 Kg

3.1.96 Kg

4. 2.25 Kg

Posted Date:-2022-03-14 10:15:37


Question:
A process is carried out for the feed mixture of 40% air and 60% oxygen, the compressor recovered 2% of oxygen, what is the exit pressure of the compressor, if the partial pressure of oxygen vapor is 5 mm Hg?

1. 2.4 mm Hg

2.4.8 mm Hg

3. 6.5 mm Hg

4.8.4 mm Hg

Posted Date:-2022-03-14 10:30:37


Question:
A process is carried out for the feed mixture of 50% air and 50% methane vapor, the compressor recovered 20% of methane, what is the exit pressure of the compressor, if the partial pressure of methane vapor is 25 mm Hg?

1.56.3 mm Hg

2.78.9 mm Hg

3.92.1 mm Hg

4.98.7 mm Hg

Posted Date:-2022-03-14 10:30:08


Question:
A process is carried out for the feed mixture of 80% air and 20% CO2, the compressor recovered 50% of CO2, what is the exit pressure of the compressor, if the partial pressure of CO2 is 15 mm Hg?

1. 135 mm Hg

2.145 mm Hg

3.175 mm Hg

4.200 mm Hg

Posted Date:-2022-03-14 10:29:42


Question:
A process is carried out for the feed mixture of 90% air and 10% water vapor, the compressor recovered 90% of water, what is the exit pressure of the compressor if the partial pressure of water vapor is 50 mm Hg?

1.286.1 mm Hg

2.396.4 mm Hg

3.458.7 mm Hg

4.529.5 mm Hg

Posted Date:-2022-03-14 10:28:43


Question:
A vessel contains air and vapor H2O, if the partial pressure of vapor H2O is 4 atm and pressure of air is 1 atm, what is the fraction of vapor H2O in vessel?

1.0.25

2.0.5

3.0.75

4.0.8

Posted Date:-2022-03-14 10:08:18


Question:
At which of the following values of pressure a solid melts first?

1.5 atm

2.720 mm Hg

3.500 KPa

4.40 Torr

Posted Date:-2022-03-14 10:18:54


Question:
CH4 is burnt with 100% excess O2 at atmospheric pressure, if CH4 conversion is 100%, what is the pressure at dew point?

1.0.2 atm

2.0.4 atm

3.0.6 atm

4. 0.8 atm

Posted Date:-2022-03-14 10:11:23


Question:
Condensation starts at which point?

1.Dew point

2. Bubble point

3.Triple point

4.None of the mentioned

Posted Date:-2022-03-14 10:25:51


Question:
Ethane is burnt with 20% excess O2 at 2 atm, conversion rate of ethane is 50%, what is the pressure at due point?

1.0.45 atm

2.0.75 atm

3. 0.9 atm

4.1 atm

Posted Date:-2022-03-14 10:12:00


Question:
Ethanol is burnt with required amount of O2 at atmospheric pressure, the conversion of ethanol is 100%, what is the pressure at due point?

1.0.2 atm

2. 0.4 atm

3.0.6 atm

4.0.8 atm

Posted Date:-2022-03-14 10:12:32


Question:
For CaOCl2, the rate of evaporation is given by W = 325p0.5M/T1.5 g/liter, where T is in K, p in mm Hg, and M is molecular weight, if its pressure is given by ln p* = 25 – 2700/T, what is the evaporation rate at T = 150 K?

1. 256 g/liter

2.499 g/liter

3.571 g/liter

4.744 g/liter

Posted Date:-2022-03-14 10:22:04


Question:
If the fraction of water vapor at 27oC and 5 atm is 0.5, then what is the fraction of water vapor at 27oC and 1 atm?

1.0.1

2.0.2

3.0.5

4.0.8

Posted Date:-2022-03-14 10:27:06


Question:
If the pressure of a gas at 27oC is 15 mm Hg, what will be its pressure at 127oC, use B = 5 X 103, C = 0, T is in kelvin and P is in mm Hg?

1.579 mm Hg

2.775 mm Hg

3.961 mm Hg

4.999 mm Hg

Posted Date:-2022-03-14 10:16:08


Question:
Pressure of a gas at 127oC is 10 mm Hg and the pressure at 527oC is 20 Pa, what is the value of B?

1.225.1

2. 365.5

3. 499.2

4.554.5

Posted Date:-2022-03-14 10:16:35


Question:
Temperature of SO2 at 5 Pa is 395 K and at 10 Pa temperature is 420 K, what is the temperature at 6 Pa?

1. 400 K

2.405 K

3. 410 K

4.415 K

Posted Date:-2022-03-14 10:18:15


Question:
The partial pressure of a system at 49oC is 125 mm Hg and saturated ammonia vapor has partial pressure 20 mm Hg at 49oC, what is the fraction of ammonia vapor in the system?

1. 0.04

2.0.08

3. 0.16

4.0.24

Posted Date:-2022-03-14 10:09:53


Question:
The vapor pressure of a compound in a liquid phase is given by ln p* = 21 – 2800/T, and in solid phase it is given by ln p* = 28 – 3500/T, what is the sublimation temperature of the compound?

1.100 K

2.120 K

3.150 K

4.200 K

Posted Date:-2022-03-14 10:21:27


Question:
The vapor pressure of liquid benzene is given by ln p* = 15 – 1280/T, and that of vapor benzene is given by ln p* = 23 – 2560/T, what is the boiling point of benzene?

1.160 K

2.200 K

3.240 K

4.300 K

Posted Date:-2022-03-14 10:20:56


Question:
What is the dew point of water at standard conditions?

1.32oF

2.212oF

3. 372oF

4.584oF

Posted Date:-2022-03-14 10:10:50


Question:
What is the fraction of water vapor at 27oC and 1 atm, if the fraction of water vapor at 127oC and 1 atm is 0.8?

1. 0.2

2.0.4

3.0.6

4.0.8

Posted Date:-2022-03-14 10:28:16


Question:
What is the molal humidity of a gas with pressure of gas vapor 10 mm Hg and pressure of vapor free gas 20 mm Hg?

1. 25%

2.50%

3.100%

4.200%

Posted Date:-2022-03-14 11:11:16


Question:
What is the molal saturation of a gas with 10 moles of gas vapor and 25 moles of dry gas?

1. 0.2

2.0.4

3. 0.8

4.1

Posted Date:-2022-03-14 11:12:05


Question:
What is the pressure of a gas at T = 227oC, it is given that A = 5, B = 4 X 104 and C = 0 if T is in kelvin and p in mm Hg?

1.0.024 mm Hg

2. 0.049 mm Hg

3.0.075 mm Hg

4. 0.096 mm Hg

Posted Date:-2022-03-14 10:14:54


Question:
What is the pressure of CO2 at 325 K, if it is given that pressure at 330 K is 6 Pa, and pressure at 320 K is 4 Pa?

1. 4.5 Pa

2. 5 Pa

3. 5.5 Pa

4. 6 Pa

Posted Date:-2022-03-14 10:17:45


Question:
What is the relative humidity of a gas with a partial pressure of water vapor 360 Pa and vapor pressure 1 atm?

1.100%

2.225.1%

3.355.4%

4.405.9%

Posted Date:-2022-03-14 11:09:59


Question:
What is the relative humidity of a gas with a partial pressure of water vapor is 5 mm Hg and vapor pressure 8 mm Hg?

1.25%

2.32.5%

3. 45%

4.62.5%

Posted Date:-2022-03-14 11:08:54


Question:
What is the relative saturation of a gas with partial pressure 10 mm Hg and vapor pressure 5 mm Hg?

1.0.5

2.1

3. 2

4.4

Posted Date:-2022-03-14 11:08:23


Question:
What is the relative saturation of a gas with partial pressure 38 mm Hg and vapor pressure 1 torr?

1.0.05

2.0.5

3. 2

4. 38

Posted Date:-2022-03-14 11:09:21


Question:
What is the unit of ‘b’ in Peng Robinson equation?

1. Liter/mole

2.Liter2/mole2

3.Mole/Liter

4.Mole2/Liter2

Posted Date:-2022-03-14 10:05:55


Question:
What is the unit of λ in the SRK equation?

1.Liter/mole

2.Mole/Liter

3.Atm(liter/mole)

4.It is dimensionless

Posted Date:-2022-03-14 10:06:22


Question:
What is the vapor pressure of ammonia at 305 K, if it is given that the vapor pressure of ammonia at 315 K is 5 mm Hg and at 325 K it is 6 mm Hg?

1. 1 mm Hg

2.2 mm Hg

3.3 mm Hg

4.4 mm Hg

Posted Date:-2022-03-14 10:22:27


Question:
Which of the following defines condensation?

1.Change of solid to vapor

2.Change of vapor to liquid

3.Change of liquid to vapor

4.Change of vapor to solid

Posted Date:-2022-03-14 10:24:53


Question:
Which of the following is defined as the ratio of partial pressure and vapor pressure?

1.Relative Humidity

2.Molal Humidity

3.Humidity

4. none of the mentioned

Posted Date:-2022-03-14 11:07:58


Question:
Which of the following is not a way of condensation of vapor?

1.Cooling at constant volume

2.Cooling at constant pressure

3. Compress it isothermally

4.Compress it

Posted Date:-2022-03-14 10:25:18


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