In case of isentropic flow, the speed of sound in an ideal gas is
proportional to (where, T = absolute temperature).
(A) 1/√T
(B) 1/T
(C) √T
(D) T

1 Answer

Answer :

(C) √T

Related questions

Description : Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas) (A) T (B) √T (C) T2 (D) 1/√T

Last Answer : (A) T

Description : In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where M = molecular weight of the gas). (A) 1/√M (B) √M (C) 1/M (D) M

Last Answer : (A) 1/√M

Description : Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) (A) √T (B) 1/√P (C) √y (D) 1/√ρ

Last Answer : (B) 1/√P

Description : The Knudsen diffusivity is proportional to (where, T = absolute temperature) (A) √T (B) T 2 (C) T (D) T 4

Last Answer : (A) √T

Description : In case of liquids, the binary diffusivity is proportional to (where, T = temperature) (A) T (B) √T (C) T 2 (D) 1/T

Last Answer : (A) T

Description : Rate constant 'k' and absolute temperature 'T' are related by collision theory (for bimolecular) as (A) k ∝ T 1.5 (B) k ∝ exp(-E/RT) (C) k ∝ √T (D) k ∝ T

Last Answer : (C) k ∝ √T

Description : The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid). (A) √T (B) T (C) T 1.5 (D) T

Last Answer : (B) T

Description : The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid). (A) √T (B) T (C) T 2 (D) T

Last Answer : (C) T

Description : From collision theory, the reaction rate constant is proportional to (A) exp (-E/RT) (B) exp (-E/2RT) (C) √T (D) T m exp (-E/RT)

Last Answer : (D) T m exp (-E/RT)

Description : Knudsen diffusion is directly proportional to (A) T (B) √T (C) 1/√T (D) T

Last Answer : (B) √T

Description : The average kinetic energy of the molecules of an ideal gas is directly proportional to – (1) Velocity of Molecules (2) Mass of Molecules (3) Absolute temperature of the gas (4) Temperature of environment

Last Answer : (3) Absolute temperature of the gas Explanation: The average kinetic energy of gas molecules is directly proportional to absolute temperature only. This implies that all molecular motion ceases if the temperature is reduced to absolute zero.

Description : The average kinetic energy of the molecules of an ideal gas is directly proportional to (1) Velocity of Molecules (2) Mass of Molecules (3) Absolute temperature of the gas (4) Temperature of environment

Last Answer : Absolute temperature of the gas

Description : According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction (A) k ∝ √T (B) k ∝ e -E/RT (C) k ∝ T e -E/RT (D) None of these

Last Answer : (B) k ∝ e -E/RT

Description : Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) (A) t 4 (B) T 4 (C) 1/t 4 (D) 1/T 4

Last Answer : (B) T

Description : The thermal radiation emitted by a body is proportional to T n , where T is its absolute temperature. The value of 'n' is exactly 4 for (A) Black painted bodies only (B) All bodies (C) Polished bodies only (D) A black body

Last Answer : (B) All bodies

Description : The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) (A) T (B) 1/T (C) T2 (D) 1/T2

Last Answer : A) T

Description : Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to  (a) T  (b) j  (c) J2  (d) Vr  (e) 1/Vr.

Last Answer : Answer : a

Description : Pick out the wrong statement. (A) The mole fraction of solute is directly proportional to the molality of a 'dilute' solution (B) For a non-reacting binary mixture of ideal gases, the partial ... at all temperature (D) The relative volatility of a binary mixture at the Azeotropic composition is 1

Last Answer : (C) Azeotropes obey Raoult's law at all temperature

Description : The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmann’s constant, T = absolute temperature) (A) √(2KT/m) (B) √(3KT/m) (C) √(6KT/m) (D) 3KT/m

Last Answer : (B) √(3KT/m)

Description : Pick out the wrong statement. (A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). ∆p (B) In the equation, T. gc = k. ... to motion (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

Last Answer : (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

Description : The local surface conductance for laminar film condensation on vertical surface is (where, t = film thickness) (A) ∝ t (B) ∝ 1/t (C) ∝ √t (D) Independent of 't

Last Answer : (B) ∝ 1/t

Description : Transition state theory relates the above quantities as (A) k ∝ e -E/RT (B) k ∝ T.e E/RT (C) k ∝ √T (D) k ∝ T 1.5

Last Answer : (B) k ∝ T.e E/RT

Description : Which of the following represents the Virial equation of state? (A) T = [RT/(V- b)] - [a/√T. V(V + b)] (B) PV/RT = 1 + (B/V) + (C/V2) + …… (C) n1u2 + μ2μ1 = 0 (D) None of these

Last Answer : (B) PV/RT = 1 + (B/V) + (C/V2) + ……

Description : An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section. (A) Adiabatic (B) Isothermal (C) Isentropic (D) Isochoric

Last Answer : (B) Isothermal

Description : The temperature in isentropic flow (A) Does not depend on Mach number (B) Depends on Mach number only (C) Cannot drop and then increase again downstream (D) None of these

Last Answer : (B) Depends on Mach number only

Description : Pick out the correct statement. (A) Fanning friction factor is inversely proportional to Reynolds number always (B) The property of a randomly packed bed (with raschig rings) is given by the ratio of the ... the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow

Last Answer : (D) Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow

Description : Pick out the wrong statement. (A) Heat transfer by radiation cannot occur across an absolute volume (B) In case of a shell and tube heat exchanger, the pressure drop through the shell is ... The amount of heat involved in the condensation or vaporisation of 1 kg of a fluid is the same

Last Answer : (A) Heat transfer by radiation cannot occur across an absolute volume

Description : The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its (A) Absolute viscosity (B) Ratio of absolute viscosity to density (C) Density (D) Reynolds number

Last Answer : (B) Ratio of absolute viscosity to density

Description : The speed of sound in an ideal gas varies as the (A) Temperature (B) Pressure (C) Density (D) None of these

Last Answer : (A) Temperature

Description : Speed of sound in an ideal gas depends on its (A) Temperature (B) Pressure (C) Specific volume (D) None of these

Last Answer : (A) Temperature

Description : The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature.  a. Charle’s Law  b. Boyle’s Law  c. Joule’s Law  d. Specific Heat

Last Answer : Boyle’s Law

Description : The pressure of the confined gas is held constant, the volume directly proportional to the absolute temperature.  a. Charle’s Law  b. Boyle’s Law  c. Zeroth Law  d. Gas Law

Last Answer : Charle’s Law

Description : A ______ is a flow in which the gas flow is adiabatic and frictionless and entropy change is zero.  A. Isentropic flow  B. Isobaric flow  C. Steady flow  D. Uniform flow

Last Answer : Isentropic flow

Description : The index of compression n tends to reach ratio of specific heats y when  (a) flow is uniform and steady  (b) process is isentropic  (c) process is isothermal  (d) process ... specific heat does not change with temperature  (e) process is isentropic and specific heat changes with temperature.

Last Answer : Answer : d

Description : Wavelength corresponding to the maximum energy is inversely proportional to the absolute temperature. This is __________ law. (A) Stefan's (B) Dalton's (C) Wien's (D) Kirchoff’s

Last Answer : (C) Wien's

Description : The volume of an ideal gas is directly proportional to its  a. pressure  b. Celsius temperature  c. Kelvin temperature  d. Fahrenheit temperature

Last Answer : Kelvin temperature

Description : According to the kinetic theory, the Kelvin temperature of an ideal gas is proportional to which one of the following. Is the temperature proportional to the gas's average molecular: w) velocity x) momentum y) kinetic energy z) potential energy

Last Answer : ANSWER: Y -- KINETIC ENERGY

Description : What temperature scale is identical to the Kelvin scale?  A. Ideal gas temperature scale  B. Ideal temperature scale  C. Absolute gas temperature scale  D. Triple point temperature scale

Last Answer : Ideal gas temperature scale

Description : According to Bernoulli's equation for steady ideal fluid flow (A) Principle of conservation of mass holds (B) Velocity and pressure are inversely proportional (C) Total energy is constant throughout (D) The energy is constant along a streamline but may vary across streamlines

Last Answer : Answer: Option D

Description : Specific volume of an ideal gas is (A) Equal to its density (B) The reciprocal of its density (C) Proportional to pressure (D) None of these

Last Answer : (B) The reciprocal of its density

Description : For an ideal gas, the activity co-efficient is (A) Directly proportional to pressure (B) Inversely proportional to pressure (C) Unity at all pressures (D) None of these

Last Answer : (C) Unity at all pressures

Description : Pick out the correct statement. (A) Like internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero (B) Melting of ice involves increase in enthalpy and ... of an ideal gas depends only on its pressure (D) Maximum work is done under reversible conditions

Last Answer : (D) Maximum work is done under reversible conditions

Description : Resistance to heat flow by conduction is proportional to (where, t & ρ are thickness & density of the material respectively and A = area normal tothe direction of heat flow.) (A) t (B) 1/ρ (C) 1/A (D) All (A), (B) & (C)

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

Description : Define isentropic process and plot it on, P-V and T-S diagram. 

Last Answer : Isentropic Process: The process in which working substance neither receives nor rejects heat to its surrounding during expansion or compression is called as Isentropic process, it is also known as adiabatic ... is frictionless and the process is irreversible when it involves friction . 

Description : Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc ) is proportional to __________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance). (A) √μ (B) 1/√μ (C) 1/μ (D) 1/μ

Last Answer : (B) 1/√μ

Description : In case of laminar flow of fluid through a circular pipe, the (A) Shear stress over the cross-section is proportional to the distance from the surface of the pipe (B) Surface of velocity distribution is a ... occurs at a radial distance of 0.5 r from the centre of the pipe (r = pipe radius)

Last Answer : (B) Surface of velocity distribution is a paraboloid of revolution, whose volume equals half the volume of circumscribing cylinder

Description : In case of end to end connection of two or more pipes in series, the __________ each pipe. (A) Same rate of flow passes through (B) Head loss is same through (C) Rate of flow in each pipe is proportional to the length of (D) Total flow rate is the sum of flow rate in

Last Answer : (A) Same rate of flow passes through

Description : In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said ... co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Last Answer : (C) Friction co-efficient for flows at equal Reynold number

Description : The isothermal and isentropic processes are reversible non-flow processes.  A. Agree  B. Disagree

Last Answer : Answer: A

Description : The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of (A) T (B) T and P (C) T, P and Z (D) T and Z

Last Answer : (B) T and P