Compressibility factor for almost all the gases are approximately same at the same (A) Pressure and temperature (B) Reduced pressure and reduced temperature (C) Critical pressure and critical temperature (D) None of these

Compressibility factor for almost all the gases are approximately same at the same
(A) Pressure and temperature
(B) Reduced pressure and reduced temperature
(C) Critical pressure and critical temperature
(D) None of these
by

1 Answer

Answer :

(B) Reduced pressure and reduced temperature
by

Related questions

Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are (A) Always greater than one (B) Same at the same reduced temperature (C) Same at the same reduced pressure (D) Both (B) & (C)

Description : Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are (A) Always greater than one (B) Same at the same reduced temperature (C) Same at the same reduced pressure (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates (A) Use of only one graph for all gases (B) Covering of wide range (C) Easier plotting (D) More accurate plotting

Description : Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates (A) Use of only one graph for all gases (B) Covering of wide range (C) Easier plotting (D) More accurate plotting

Last Answer : A) Use of only one graph for all gases

The compressibility factor, x, is used for predicting the behavior of nonideal gases. How is the compressibility ty factor defined relative to an ideal gas? (subscript “c”refers to critical value)  A. z = P / Pc  B. z = pV/ RT  C. z = T /Tc  D. z = RT / pV Hint: for an real gases the compressibility factor, x, is an dimensionless constant given by pV=zRT. Therefore z = pV / RT

Description : The compressibility factor, x, is used for predicting the behavior of nonideal gases. How is the compressibility ty factor defined relative to an ideal gas? (subscript c refers to critical value)  A. ... compressibility factor, x, is an dimensionless constant given by pV=zRT. Therefore z = pV / RT

Last Answer : z = pV/ RT

Critical compressibility factor for all substances (A) Are more or less constant (vary from 0.2 to 0.3) (B) Vary as square of the absolute temperature (C) Vary as square of the absolute pressure (D) None of these

Description : Critical compressibility factor for all substances (A) Are more or less constant (vary from 0.2 to 0.3) (B) Vary as square of the absolute temperature (C) Vary as square of the absolute pressure (D) None of these

Last Answer : (A) Are more or less constant (vary from 0.2 to 0.3)

If two gases have same reduced temperature and reduced pressure, then they will have the same (A) Volume (B) Mass (C) Critical temperature (D) None of these

Description : If two gases have same reduced temperature and reduced pressure, then they will have the same (A) Volume (B) Mass (C) Critical temperature (D) None of these

Last Answer : (D) None of these

What is meant by compressibility factor of gases? How does its value deviate from that of an ideal gas in case of real gases and what does it indicate?

Description : What is meant by compressibility factor of gases? How does its value deviate from that of an ideal gas in case of real gases and what does it indicate?

Last Answer : Ans. It is the ratio of the product PV to nRT. Z = PV/nRT. For ideal gas its value is unity. Z < 1 indicates negative deviation i.e. gas is more compressible due predominance of attractive forces. Z > 1 indicates positive deviation i.e. gas is less compressible due predominance of repulsive forces.

What is used for predicting the behavior of non-ideal gases?  a. Compressibility factor  b. Expansivity factor  c. Emissivity factor  d. Van-d-whal’s factor

Description : What is used for predicting the behavior of non-ideal gases?  a. Compressibility factor  b. Expansivity factor  c. Emissivity factor  d. Van-d-whal’s factor

Last Answer : Compressibility factor

Compressibility factor of a gas is (A) Not a function of its pressure (B) Not a function of its nature (C) Not a function of its temperature (D) Unity, if it follows PV = nRT

Description : Compressibility factor of a gas is (A) Not a function of its pressure (B) Not a function of its nature (C) Not a function of its temperature (D) Unity, if it follows PV = nRT

Last Answer : (A) Not a function of its pressure

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature. (A) Boyle (B) Inversion (C) Critical (D) Reduced

Description : The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature. (A) Boyle (B) Inversion (C) Critical (D) Reduced

Last Answer : (A) Boyle

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature. (A) Critical (B) Boyle (C) Inversion (D) Reduced

Description : The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature. (A) Critical (B) Boyle (C) Inversion (D) Reduced

Last Answer : (B) Boyle

Compressibility of sandy soils is (A) Almost equal to that of clayey soils (B) Much greater than that of clayey soils (C) Much less than that of clayey soils (D) None of the above

Description : Compressibility of sandy soils is (A) Almost equal to that of clayey soils (B) Much greater than that of clayey soils (C) Much less than that of clayey soils (D) None of the above

Last Answer : (C) Much less than that of clayey soils

The third law of thermodynamics states that the (A) Heat capacity of a crystalline solid is zero at absolute zero temperature (B) Heat transfer from low temperature to high temperature source is not possible without external work (C) Gases having same reduced properties behaves similarly (D) None of these

Description : The third law of thermodynamics states that the (A) Heat capacity of a crystalline solid is zero at absolute zero temperature (B) Heat transfer from low temperature to high temperature source is ... without external work (C) Gases having same reduced properties behaves similarly (D) None of these

Last Answer : (A) Heat capacity of a crystalline solid is zero at absolute zero temperature

Consider the following statements relating to foundations on expansive soils: 1. Strength should be improved and compressibility should be reduced. 2. Compressibility should be increased. 3. No stabilization should be done. Which of these statements is/are correct? (a) 1, 2 & 3 (b) 2 only (c) 1 only (d) 3 only

Description : Consider the following statements relating to foundations on expansive soils: 1. Strength should be improved and compressibility should be reduced. 2. Compressibility should be increased. 3. No stabilization should be done. Which of these ... ? (a) 1, 2 & 3 (b) 2 only (c) 1 only (d) 3 only

Last Answer : (c) 1 only

In the plot of Z(compressibility factor) vs P, Z attains a value of unity at a certain pressure. What does this signify?

Description : In the plot of Z(compressibility factor) vs P, Z attains a value of unity at a certain pressure. What does this signify?

Last Answer : Ans. It implies that at this value of pressure attractive and repulsive forces balance each other. Below this pressure attraction dominates and Z < 1. Above this pressure repulsion dominates and Z > 1.

Pick up the correct statement from the following: (A) Coefficient of compressibility is the decrease in void ratio per unit increase of pressure (B) The percent settlement at any time is called degree of consolidation (C) Time factor is a dimensionless quantity (D) All the above

Description : Pick up the correct statement from the following: (A) Coefficient of compressibility is the decrease in void ratio per unit increase of pressure (B) The percent settlement at any time is called degree of consolidation (C) Time factor is a dimensionless quantity (D) All the above

Last Answer : Answer: Option D

Account for the following properties of gases on the basis of kinetic molecular theory of gasesa) high compressibility b) gases occupy whole of the volume available to them.

Description : Account for the following properties of gases on the basis of kinetic molecular theory of gasesa) high compressibility b) gases occupy whole of the volume available to them.

Last Answer : Ans. a) High compressibility is due to large empty space between the gas molecules. b) Due to absence of attractive forces between the molecules, they can easily separate from one another.

In an incompressible flow of fluid, the fluid (A) Temperature remains constant (B) Compressibility is greater than zero (C) Density does not change with pressure & temperature (D) Is frictionless

Description : In an incompressible flow of fluid, the fluid (A) Temperature remains constant (B) Compressibility is greater than zero (C) Density does not change with pressure & temperature (D) Is frictionless

Last Answer : (C) Density does not change with pressure & temperature

Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter(B) A Venturimeter with a given gage difference discharges at a greater rate,when the flow is vertically downward through it, than when the flow is verticallyupward(C) For a given pressure difference, the discharge of gas is greater through aVenturimeter, when compressibility is taken into account, than when it isneglected(D) The overall pressure loss is the same in a given pipe line, whether aVenturimeter or a nozzle with the same throat dia is used

Description : Sele(A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement. (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement

Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter(B) A Venturimeter with a given gage difference discharges at a greater rate,when the flow is vertically downward through it, than when the flow is verticallyupward(C) For a given pressure difference, the discharge of gas is greater through aVenturimeter, when compressibility is taken into account, than when it isneglected(D) The overall pressure loss is the same in a given pipe line, whether aVenturimeter or a nozzle with the same throat dia is used

Description : Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter

The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law) (A) V1/V2 (B) V2/V1 (C) V1- V2 (D) V1.V2

Description : The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law) (A) V1/V2 (B) V2/V1 (C) V1- V2 (D) V1.V2

Last Answer : (A) V1/V2

The compressibility factor for an ideal gas is 1. Its value for any other real gas is (A) 1 (B) < 1 (C) > 1 (D) Either (B) or (C), depends on the nature of the gas

Description : The compressibility factor for an ideal gas is 1. Its value for any other real gas is (A) 1 (B) < 1 (C) > 1 (D) Either (B) or (C), depends on the nature of the gas

Last Answer : D) Either (B) or (C), depends on the nature of the gas

Pick out the wrong statement. (A) In drying a solid containing moisture above the critical moisture content the number of degrees of freedom is 2 (B) Sherwood number in mass transfer corresponds to Nusselt number in heat transfer and Schmidt number to Prandtl number (C) Forced convection is relatively more effective in increasing the rate of mass transfer, if Schmidt number is larger (D) Hot gases at moderate pressure are usually in the shell side of shell and tube heat exchangers. At higher pressure, however, it is customary to put gas in the tube side

Description : Pick out the wrong statement. (A) In drying a solid containing moisture above the critical moisture content the number of degrees of freedom is 2 (B) Sherwood number in mass transfer corresponds to ... tube heat exchangers. At higher pressure, however, it is customary to put gas in the tube side

Last Answer : (C) Forced convection is relatively more effective in increasing the rate of mass transfer, if Schmidt number is larger

6. Liquefaction of gases cannot be done by (A) Exchange of heat with colder stream (B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion) (C) Merely compressing it beyond critical pressure (D) Adiabatic expansion against a piston or in a turbine

Description : 6. Liquefaction of gases cannot be done by (A) Exchange of heat with colder stream (B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion) (C) Merely compressing it beyond critical pressure (D) Adiabatic expansion against a piston or in a turbine

Last Answer : (C) Merely compressing it beyond critical pressure

he acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr- 1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always (A) > 2 (B) < 1 (C) > 1 (D) < 3

Description : he acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr- 1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always (A) > 2 (B) < 1 (C) > 1 (D) < 3

Last Answer : (B) < 1

The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to (A) 2100 (B) 2700 (C) 10,000 (D) 21,000

Description : The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to (A) 2100 (B) 2700 (C) 10,000 (D) 21,000

Last Answer : Answer: Option D

For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3 ), while the C.V. is same on weight basis (i.e., kcal/kg)? (A) Propane and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F. gas and coke oven gas

Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3 ), while the C.V. is same on weight basis (i.e., kcal/kg)? (A) Propane and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F. gas and coke oven gas

Last Answer : (A) Propane and acetylene

For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)? (A) Propane and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F gas and coke oven gas

Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)? (A ... and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F gas and coke oven gas

Last Answer : D) B.F gas and coke oven gas

Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas. (A) Less than (B) Same as (C) More than (D) Half

Description : Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas. (A) Less than (B) Same as (C) More than (D) Half

Last Answer : (A) Less than

Which of the following compressibility factor of ideal gas  a. 1  b. 2  c. 1.5  d. 0

Description : Which of the following compressibility factor of ideal gas  a. 1  b. 2  c. 1.5  d. 0

Last Answer : 1

Transition from laminar flow to turbulent flow is aided by the (A) Surface roughness and curvature (i.e. sharp corners) (B) Vibration (C) Pressure gradient and the compressibility of the flowing medium (D) All (A), (B) & (C)

Description : Transition from laminar flow to turbulent flow is aided by the (A) Surface roughness and curvature (i.e. sharp corners) (B) Vibration (C) Pressure gradient and the compressibility of the flowing medium (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Mercury is an ideal barometric fluid mainly due to its(A) High density (B) Low compressibility (C) Low capillary action (D) Very low vapor pressure

Description : Mercury is an ideal barometric fluid mainly due to its (A) High density (B) Low compressibility (C) Low capillary action (D) Very low vapor pressure

Last Answer : (D) Very low vapor pressure

Which of the fluid forces are not considered in the Reynold's equation of flow? (A) Viscous forces (B) Turbulent forces (C) Pressure forces (D) Compressibility forces

Description : Which of the fluid forces are not considered in the Reynold's equation of flow? (A) Viscous forces (B) Turbulent forces (C) Pressure forces (D) Compressibility forces

Last Answer : (D) Compressibility forces

Pick out the correct statement pertaining to Venturimeter. (A) A Venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward (B) The co-efficient of contraction of a Venturimeter is always unity (C) For a fixed pressure drop, the discharge of a gas through a Venturimeter is greater, when compressibility is taken into account, than when it is neglected (D) None of these

Description : Pick out the correct statement pertaining to Venturimeter. (A) A Venturimeter with a fixed pressure drop discharges more, when the flow is vertically downward, than when the flow is vertically upward (B ... , when compressibility is taken into account, than when it is neglected (D) None of these

Last Answer : (D) None of these

Which of the following has the minimum compressibility? (A) Water at room temperature (B) Air at room temperature(C) Oxygen at room temperature(D) Nitrogen at room temperature

Description : Which of the following has the minimum compressibility? (A) Water at room temperature (B) Air at room temperature (C) Oxygen at room temperature (D) Nitrogen at room temperature

Last Answer : (A) Water at room temperature

Is it true that almost all living organisms are approximately 70 percent water?

Description : Is it true that almost all living organisms are approximately 70 percent water?

Last Answer : Need answer

Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. (A) Bound (B) Unbound (C) Critical (D) None of these

Description : Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. (A) Bound (B) Unbound (C) Critical (D) None of these

Last Answer : (A) Bound

Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Description : Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Last Answer : (A) Unbound

With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure (A) Increases (B) Decreases (C) Remain same (D) Decreases linearly

Description : With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure (A) Increases (B) Decreases (C) Remain same (D) Decreases linearly

Last Answer : (A) Increases

The critical mass of a fissionable material can be reduced by (A) Heating it (B) Cooling it (C) Surrounding it by neutron reflecting material (D) Surrounding it by neutron absorbing material

Description : The critical mass of a fissionable material can be reduced by (A) Heating it (B) Cooling it (C) Surrounding it by neutron reflecting material (D) Surrounding it by neutron absorbing material

Last Answer : (C) Surrounding it by neutron reflecting material

With increase in temperature, the solubility of gases in liquids, at fixed pressure (A) Increases (B) Decreases (C) Remain same (D) Either (A) or (B), depends on the system

Description : With increase in temperature, the solubility of gases in liquids, at fixed pressure (A) Increases (B) Decreases (C) Remain same (D) Either (A) or (B), depends on the system

Last Answer : (B) Decreases

The void ratio of a soil sample decreases from 1.50 to 1.25 when the pressure is increased from 25 tonnes/m2 to 50 tonnes/m2 , the coefficient of compressibility is (A) 0.01 (B) 0.02 (C) 0.05 (D) 0.001

Description : The void ratio of a soil sample decreases from 1.50 to 1.25 when the pressure is increased from 25 tonnes/m2 to 50 tonnes/m2 , the coefficient of compressibility is (A) 0.01 (B) 0.02 (C) 0.05 (D) 0.001

Last Answer : (A) 0.01

The buoyancy depends upon the (A) Weight of the liquid displaced (B) Pressure with which the liquid is displaced (C) Viscosity of the liquid (D) Compressibility of the liquid

Description : The buoyancy depends upon the (A) Weight of the liquid displaced (B) Pressure with which the liquid is displaced (C) Viscosity of the liquid (D) Compressibility of the liquid

Last Answer : Answer: Option A

The variation in the volume of a liquid with the variation of pressure is called its (A) Surface tension (B) Compressibility (C) Capillarity (D) Viscosity

Description : The variation in the volume of a liquid with the variation of pressure is called its (A) Surface tension (B) Compressibility (C) Capillarity (D) Viscosity

Last Answer : Answer: Option B

CAS is IAS corrected for: a. Position and instrument error b. Instrument, pressure, and density error c. Relative density only d. Compressibility

Description : CAS is IAS corrected for: a. Position and instrument error b. Instrument, pressure, and density error c. Relative density only d. Compressibility

Last Answer : a. Position and instrument error

CAS is IAS corrected for: a. Position and instrument error b. Instrument, pressure, and density error c. Relative density only d. Compressibility

Description : CAS is IAS corrected for: a. Position and instrument error b. Instrument, pressure, and density error c. Relative density only d. Compressibility

Last Answer : a. Position and instrument error

The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called (A) Density of liquid (B) Specific gravity of liquid (C) Compressibility of liquid (D) Surface tension of liquid

Description : The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called (A) Density of liquid (B) Specific gravity of liquid (C) Compressibility of liquid (D) Surface tension of liquid

Last Answer : Answer: Option B

For efficient working of a control meter, its throat length is approximately kept (A) Equal to the critical depth (B) Twice the critical depth (C) Three times the critical depth (D) Four times the critical depth

Description : For efficient working of a control meter, its throat length is approximately kept (A) Equal to the critical depth (B) Twice the critical depth (C) Three times the critical depth (D) Four times the critical depth

Last Answer : Answer: Option C

A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number of active coils is 10. If the mean coil diameter is reduced to 10 mm, the stiffness of the spring is approximately a. increased by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

Description : A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number ... by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

Last Answer : a. increased by 8 times

Approximately ____ percent of all poultry carcasses processed in the United States are downgraded (reduced quality) due mostly to bruises. a. 10 c. 29 b. 20 d. 45

Description : Approximately ____ percent of all poultry carcasses processed in the United States are downgraded (reduced quality) due mostly to bruises. a. 10 c. 29 b. 20 d. 45

Last Answer : c. 29