Description : 3.0 lbm of air are contained at 25 psia and 100 ˚F. Given that Rair = 53.35 ft-lbf/lbm- ˚F, what is the volume of the container? A.10.7 ft^3 B.14.7 ft^3 C.15 ft^3 D.24.9 ft^3 Formula: use the ideal gas law pV = mRT T = (100 +460) ˚R V = mRT/p
Last Answer : 24.9 ft^3
Description : General gas equation is (a) PV=nRT (b) PV=mRT (d) PV = C (c) PV=KiRT (e) Cp-Cv = Wj
Last Answer : Answer : b
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
Description : Represent constant volume process on PV & TS diagram for steam.
Last Answer : Represent constant volume process on PV & TS diagram for steam.
Description : A gas is compressed from 1 bar and 30°C to 5 bars and 30°C. Identify process and show on PV diagram.
Last Answer : Gas is compressed from (1) 1 bar 30 0C to (2) 5 bar 30 0C Temp is constant. Hence process is isothermal. P x V = Constant
Description : Rare gases are - (1) Mono atomic (2) di atomic (3) tri atomic (4) none of above
Last Answer : (1) Mono atomic Explanation: The so-called "rare" gases Neon (Ne), Krypton (Kr) and Xenon (Xe), are present in air in very low concentrations.
Description : Air standard cycle uses ____ as a working medium. a. Perfect gas b. Real gas c. Ideal gas d. Natural gas
Last Answer : ANSWER a. Perfect gas
Description : The equation, PV = nRT, is best obeyed by gases at (A) Low pressure & high temperature (B) High pressure & low temperature (C) Low pressure & low temperature (D) None of these
Last Answer : (A) Low pressure & high temperature
Description : The ideal gas equation is A. PV = constant B. PT = constant C. V⁄T D. PV = nRT
Last Answer : PV = nRT
Description : What mass of nitrogen is contained in a10 ft3 vessel at a pressure of 840atm and 820°R? Make a computation by using ideal gas equation. a. 194lb b. 214lb c. 394 lb d. 413lb formula: m=pV /RT
Last Answer : 394 lb
Description : Which of the following is the Ideal gas law (equation)? A. V/T = K B. V= k*(1/P) C. P1/T1 = P2/T2 D. PV = nRT
Description : In the equation Pv = RT, the constant of proportionality R is known as ______. A. Universal gas constant B. Gas constant C. Ideal gas factor D. Gas index
Last Answer : Gas constant
Description : What is the name given to the equation PV=nRT? w) law of partial pressure x) ideal gas equation y) quadratic equation z) Raoult's equation
Last Answer : ANSWER: X -- IDEAL GAS EQUATION
Description : Which of the following statements is TRUE for an ideal gas, but not for a real gas? A. PV = nRT B. An increase in temperature causes an increase in the kinetic energy of the gas C. The ... same as the volume of the gas as a whole D. No attractive forces exists between the molecule of a gas
Description : A 500 mL glass flask is filled at 298 K and 1 atm, pressure with three diatomic gases, X, Y and Z . The initial volume ratio of the gases before mixin
Last Answer : A 500 mL glass flask is filled at 298 K and 1 atm, pressure with three diatomic gases, X, Y and Z . The ... . `H_2 , F_2 , O_2` D. `O_2,H_2 , F_2`
Description : What is the equation for the work done by a constant temperature system? A. W = mRTln(V2-V1) B. W = mR( T2-T1 ) ln( V2/V1) C. W = mRTln (V2/V1) D. W = RT ln (V2/V1) Formula : W=∫ pdV lim1,2 ∫ = mRT / V
Last Answer : W = mRTln (V2/V1)
Description : Van der Waals equation explains the behaviour of (a) Mixture of gases (b) Ideal gas (c) Real gas (d) Water gas
Last Answer : Ans:(c)
Description : The condensing pressure due to the presence of non-condensable gases, as compared to that actually required forcondensing temperatures without non-condensable gases, (a) will be higher (b) will be ... remain unaffected (d) may be higher or lower depending upon the nature of non-condensable gases
Last Answer : Ans: a
Description : In a 4 S diesel engine, the term ‘squish’ refers to the (a) Injection of fuel in the precombustion chamber (b) Discharge of gases from the precombustion chamber (c) Entry of air into the combustion chamber (d) Stripping of fuel from the core
Last Answer : Ans :c
Description : In compression ignition engines, swirl denotes a. Haphazard motion of the gases in the cylinder b. Rotary motion of the gases in the cylinder. c. Radial motion of the gases in the cylinder. d. None of the above
Last Answer : ANSWER a. Haphazard motion of the gases in the chamber
Description : Scavenging air in diesel engine means a. air used for combustion under pressure b. forced air for cooling the cylinder c. burnt air containing products of combustion d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke
Last Answer : ANSWER d. air used for forcing burnt gases out of the engines cylinder during the exhaust stroke
Description : The area of actual indicator diagram on an air compressor as compared to area of ideal indicator diagram is A. Less B. More C. Same D. Unpredictable
Last Answer : ANSWER : B
Description : In a two stage reciprocating air compressor with a suction pressure of 2 bar and delivery pressure of 8 bar the ideal intercooler pressure will be A. 10 bar B. 6 bar C. 4 bar D. 3 bar
Last Answer : ANSWER : C
Description : An ideal air standard Otto cycle has a compression ratio of 8.5. If the ratio of the specific heats is 1.4, then what is thermal efficiency (in percentage) of the Otto cycle? a. 57.5% b. 45.7% c. 52.5% d. 95%
Last Answer : ANSWER a. 57.5%
Description : An ideal gas is heated at constant volume and then expanded isothermally. Show processes on P-V & T-S diagrams.
Last Answer : Process 1-2 : Constant volume process Process 2-3 : Constant temperature process (Isothermal process)
Description : An important characteristic of absorption system of refrigeration is (a) noisy operation (b) quiet operation (c) very little power consumption (d) its input only in the form of heating.
Last Answer : Ans: D
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 : Clapeyron equation is applicable for registration at (a) saturation point of vapour (b) saturation point of liquid (c) sublimation temperature (d) triple point.
Description : Clapeyron equation is a relation between (a) temperature, pressure and enthalpy (b) specific volume and enthalpy (c) temperature and enthalpy (d) temperature, pressure, specific vapour and enthalpy.
Description : Write steady flow energy equation considering mass flow rate of fluid. Write units of different quantities involved.
Last Answer : Steady flow process ( open system ) : Hence steady flow equation can be expressed as: Internal Energy at 1 + Potential Energy at 1 + Kinetic Energy at 1 + Flow work at 1 + Heat supplied = Internal ... Flow work at 2 + Work done i.e. Hence the steady flow energy equation is,
Description : Write continuity equation for nozzles. State involved with their units. meaning of all terms
Last Answer : Continuity equation for nozzle Mass flow rate = Density x Area x Velocity ( Density = 1/v) m = (AC/v ) = A1C1/v1) = (A2C2/v2) where, m = mass flow rate of steam in kg/s A= cross ... given section in m2 v = specific volume of steam at given section in m3/kg C= velocity of steam in m/s
Description : Charles' law for gases states that (A) V/T = Constant (B) V ∝ 1/T (C) V ∝ 1/P (D) PV/T = Constant
Last Answer : (A) V/T = Constant
Description : Boyle’s law i.e. pV = constant is applicable to gases under (a) all ranges of pressures (b) only small range of pressures (c) high range of pressures (d) steady change of pressures (e) atmospheric conditions.
Description : The expression for entropy change given by, ΔS = - nR ln (P2/P1), holds good for (A) Expansion of a real gas (B) Reversible isothermal volume change (C) Heating of an ideal gas (D) Cooling of a real gas
Last Answer : (B) Reversible isothermal volume change
Description : If air is at pressure, p, of 3200 lbf/ft2 , and at a temperature, T, of 800 ˚R, what is the specific volume, v? (R=5303 ft-lbf/lbm-˚R, and air can be modeled as an ideal gas.) A.9.8 ft^3/lbm B.11.2 ft^3/lbm C.13.33 ft^3/lbm D.14.2 ft^3/lbm Formula: pv = RT v = RT / p
Last Answer : 13.33 ft^3/lbm
Description : Which of the following is true for Virial equation of state? (A) Virial co-efficients are universal constants (B) Virial co-efficients 'B' represents three body interactions (C) Virial co-efficients ... of temperature only (D) For some gases, Virial equations and ideal gas equations are the same
Last Answer : (C) Virial co-efficients are function of temperature only
Description : Considering one mole of any gas, the equation of state of ideal gases is simply the ______ law. A. Gay-Lussac law B. Dulong and Petit C. Avogadro’s D. Henry’s
Last Answer : Avogadro’s
Description : PV = What is RT Equation ?
Last Answer : The equation of the ideal.
Description : Pick out the correct equation relating 'F' and 'A'. (A) F = A + PV (B) F = E + A (C) F = A - TS
Last Answer : (A) F = A + PV
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 : Which of the following is Virial equation of state? (A) (p + a/V2)(V - b) = nRT (B) PV = nRT (C) PV = A + B/V + C/V2 + D/V3 + ... (D) None of these
Last Answer : (C) PV = A + B/V + C/V2 + D/V3 + ...
Description : Why we use aluminium for body parts of MRT TRAIN?
Last Answer : Please
Description : What is the full form of MRT ?
Last Answer : The full form of MRT is Mass Rapid Transport.
Description : When is the mayflower mrt station open officially?
Last Answer : The mayflower mrt station open officially is Thomson-East Coast Line
Description : The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of (A) Newtonian liquids (B) Non-Newtonian liquids (C) Ideal gases (D) Real gases
Last Answer : (C) Ideal gases
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.
Description : If a hydrocarbon reacts with a diatomic molecule of oxygen would it be a combustion, synthesis, or single or double replacement reaction?
Last Answer : answer:Say the two are isolated in a certain area and it’s hot enough to get them to collide. I think you’d get HCO2. So synthesis. And I’ve read that HCO2 has to do with, “The Lewis Structure.” I’d try e-mailing a chemistry, physics or an astronomy professor if I were you.
Description : Nitrogen exists as diatomic molecule and phosphorus as `P_(4)`. Why ?
Last Answer : Nitrogen exists as diatomic molecule and phosphorus as `P_(4)`. Why ? A. `N_(2)` has ... P has preference to adapt structures with small bond angles
Description : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` released a diatomic gas Q. Find the value
Last Answer : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` ... x & y are the molar mass of P and Q.