The work done by a weightless piston in causing an expansing `Delta V` (at constant temperature), when the opposing pressure P is variable, is given b

The work done by a weightless piston in causing an expansing `Delta V` (at constant temperature), when the opposing pressure P is variable, is given b
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The work done by a weightless piston in causing an expansing `Delta V` (at constant temperature), when the opposing ... 0 C. `W = -P Delta V` D. None
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Gas is enclosed in a cylinder with a weighted piston as the stop boundary. The gas is heated and expands from a volume of 0.04 m^3 to 0.10 m^3 at a constant pressure of 200kPa.Calculate the work done by the system.  A. 8 kJ  B. 10 kJ  C.12 kJ  D.14 kJ Formula: W = p(V2-V1)

Description : Gas is enclosed in a cylinder with a weighted piston as the stop boundary. The gas is heated and expands from a volume of 0.04 m^3 to 0.10 m^3 at a constant pressure of 200kPa.Calculate the work done by the system.  A. 8 kJ  B. 10 kJ  C.12 kJ  D.14 kJ Formula: W = p(V2-V1)

Last Answer : 12 kJ

The pressure inside a piston cylinder is a variable of a) Radius b) Plane angle c) Z plane distance d) Constant, not a variable

Description : The pressure inside a piston cylinder is a variable of a) Radius b) Plane angle c) Z plane distance d) Constant, not a variable

Last Answer : c) Z plane distance

A gas is enclosed in a cylinder with a weighted piston as the top boundary. The gas is heated and expands from a volume of 0.04 m3 to 0.10 m3 at a constant pressure of 200 kPa. Find the work done on the system.  a. 5 kJ  b. 15 kJ  c. 10 kJ  d. 12 kJ

Description : A gas is enclosed in a cylinder with a weighted piston as the top boundary. The gas is heated and expands from a volume of 0.04 m3 to 0.10 m3 at a constant pressure of 200 kPa. Find the work done on the system.  a. 5 kJ  b. 15 kJ  c. 10 kJ  d. 12 kJ

Last Answer : 12 kJ

The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by (A) (∂E/∂ni)S, v, nj (B) (∂G/∂ni)T, P, nj = (∂A/∂ni) T, v, nj (C) (∂H/∂ni)S, P, nj (D) All (A), (B) and (C)

Description : The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and ... , nj (C) (∂H/∂ni)S, P, nj (D) All (A), (B) and (C)

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

Show digramatically the changes in the position of piston, if a. Pressure is increased from 1.0 bar to 2.0 bar at constant temperature. 

Description : Show digramatically the changes in the position of piston, if a. Pressure is increased from 1.0 bar to 2.0 bar at constant temperature. 

Last Answer : Consider a sample of a gas in a cylinder with a movable piston. Show digramatically the changes in ... pressure is decreased from 4 bar to 3 bar.

One mole of nitrogen at 8 bar and 600 K is contained in a piston cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is (A) 30554 (B) 10373 (C) 4988.4 (D) 4364.9

Description : One mole of nitrogen at 8 bar and 600 K is contained in a piston cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is (A) 30554 (B) 10373 (C) 4988.4 (D) 4364.9

Last Answer : (B) 10373

A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37.0^(@)C` . As it does so, it absorbs

Description : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37.0^(@)C` . As it does so, it absorbs

Last Answer : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37. ... J` D. `q= +208 J, w=+208 J`

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

if pressure P is inversely proportional to volume (V) at constant temperature, then PV is constant (True/False)

Description : if pressure P is inversely proportional to volume (V) at constant temperature, then PV is constant (True/False)

Last Answer : if pressure P is inversely proportional to volume (V) at constant temperature, then PV is constant (True/False)

The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv ), depends upon its (A) Pressure (B) Volume (C) Temperature (D) All (A), (B) & (C)

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Last Answer : (C) Temperature

For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)  A. p v = constant, if T is kept constant  B. v/T = constant, if p is kept constant  C. p/T = constant, if v is kept constant  D. T/p = constant, if v is kept constant

Description : For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)  A. p v = constant, if T is kept constant  B. v/T = constant, if p is kept constant  C. p/T = constant, if v is kept constant  D. T/p = constant, if v is kept constant

Last Answer : Answer: A

Under which of the following conditions is the relation, `Delta H = Delta E + P Delta V` valid for a system :-

Description : Under which of the following conditions is the relation, `Delta H = Delta E + P Delta V` valid for a system :-

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A gas is compressed in a cylinder by a movable piston to a volume onehalf its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be  (a) 300 Nm  (b) 300,000 Nm  (c) 30 Nm  (d) 3000 Nm  (e) 30,000 Nm.

Description : A gas is compressed in a cylinder by a movable piston to a volume onehalf its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be  (a) 300 Nm  (b) 300,000 Nm  (c) 30 Nm  (d) 3000 Nm  (e) 30,000 Nm.

Last Answer : Answer : b

At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters

Description : At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas? w) 10,000 milliliters x) 400 milliliters y) 1,000 milliliters z) 4,000 milliliters

Last Answer : ANSWER: X -- 400 MILLILITERS

Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the vapor pressure of "X" be when the volume above the liquid is 100 ml and the temperature 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr

Description : Liquid "X" is at equilibrium with its vapor in a cylinder and piston apparatus. When the volume of the space above the liquid is 50 ml and the temperature 25!, the vapor pressure of "X" is 120 torr. What will the ... 25!C? Some liquid is always present. w) 30 torr x) 60 torr y) 120 torr z) 240 torr

Last Answer : ANSWER: Y -- 120 TORR

If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to  (a) + v  (b) – ve  (c) zero  (d) pressure x volume  (e) any where between zero and infinity.

Description : If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to  (a) + v  (b) – ve  (c) zero  (d) pressure x volume  (e) any where between zero and infinity.

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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

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)

Forget about the price. Would you want to be launched into space for 10-15 minutes and be weightless? What a rush!

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Is there a certain reason why mosquitos are so weightless?

Description : Is there a certain reason why mosquitos are so weightless?

Last Answer : I think you just stated it. Their weightlessness is part of their success strategy. If they were heavy, you’d feel it and brush them off. Also their saliva contains an anesthetic so we don’t feel the bite. Clever little buggers.

Whats weightless, visible to the naked eye, and when you put it in a barrel of water it will make the barrel lighter in weight.? -Riddles

Description : Whats weightless, visible to the naked eye, and when you put it in a barrel of water it will make the barrel lighter in weight.? -Riddles

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I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I? -Riddles

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Which is a hypothetical string theory weightless particle? -Technology

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A balloon filled with helium rises in air because – (1) air exerts an upward force on the balloon (2) the balloon is weightless (3) helium is less dense than air (4) helium pushes down on the air below the balloon

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Which of the following is not a weightless pollutant? (A) SPM (B) Thermal pollution (C) Radioactive rays(D) Noise pollution

Description : Which of the following is not a weightless pollutant? (A) SPM (B) Thermal pollution (D) Noise pollution (C) Radioactive rays

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A balloon filled with helium rises in air because (1) air exerts an upward force on the balloon (2) the balloon is weightless (3) helium is less dense than air (4) helium pushes down on the air below the balloon

Description : A balloon filled with helium rises in air because (1) air exerts an upward force on the balloon (2) the balloon is weightless (3) helium is less dense than air (4) helium pushes down on the air below the balloon

Last Answer : helium is less dense than air

The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is a.8.88 m/sec b.16.32 m/sec c.5.88 m/sec d.8.16 m/sec e.Zero

Description : The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is a.8.88 m/sec b.16.32 m/sec c.5.88 m/sec d.8.16 m/sec e.Zero

Last Answer : e. Zero

Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics. (A) Piston (B) Gear (C) Positive displacement (D) Sump

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Last Answer : (B) Gear

Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`.

Description : Assertion (A): For a particular reaction, heat of combustion at constant pressure `(q_(P))` is always greater than that at constant volume `(q_(V))`.

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Boyle's law states that A. pressure of a gas is inversely proportional to its volume i.e. P × V = constant B. pressure of a gas is directly proportional to its volume i.e. P⁄V = constant C. pressure of a gas is inversely proportional to the square of its volume i.e. P × V² = constant D. pressure of a gas is directly proportional to the square of its volume i.e. P ⁄ V² = constant

Description : Boyle's law states that A. pressure of a gas is inversely proportional to its volume i.e. P V = constant B. pressure of a gas is directly proportional to its volume i.e. P⁄V = constant C. ... of a gas is directly proportional to the square of its volume i.e. P ⁄ V² = constant

Last Answer : pressure of a gas is inversely proportional to its volume i.e. P × V = constant

Van der Waals derived an expression for the ‘pressure defect’, if the observed pressure is denoted as ‘p’ and volume is denoted as ‘V’, the gas pressure in the bulk of the gas is equal to: A. p + a/V; where a: constant for the particular gas B. p + a/(V²); where a: constant for the particular gas C. p + (a × V); where a: constant for the particular gas D. p + (a × V²); where a: constant for the particular gas

Description : Van der Waals derived an expression for the pressure defect', if the observed pressure is denoted as p' and volume is denoted as V', the gas pressure in the bulk of the gas is equal to: A. p + ... a: constant for the particular gas D. p + (a V²); where a: constant for the particular gas

Last Answer : p + a/(V²); where a: constant for the particular gas

The corresponding Existential Instantiation rule: for the existential quantifier is slightly more complicated. For any sentence a, variable v, and constant symbol k that does not appear elsewhere in the knowledge base. a) True b) False

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Last Answer : a) True

In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. ...

Description :  In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : -  a) Constant power mode b) Constant torque mode c) Constant slip mode d) Variable power and variable torque mode

Last Answer :  In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : - Constant torque mode

The 'E/P converter' shown in the illustration receives a _____________. EL-0096 A. steady pressure signal and produces a programmed electrical output B. variable electrical signal and produces a corresponding pressure output C. steady electrical signal and produces an inverse temperature correction D. variable pressure signal and produces a corresponding electrical output

Description : The 'E/P converter' shown in the illustration receives a _____________. EL-0096 A. steady pressure signal and produces a programmed electrical output B. variable electrical signal ... an inverse temperature correction D. variable pressure signal and produces a corresponding electrical output

Last Answer : Answer: B

Boyle's law for gases states that (A) P ∝ 1/V, when temperature is constant (B) P ∝ 1/V, when temperature & mass of the gas remain constant (C) P ∝ V, at constant temperature & mass of the gas (D) P/V = constant, for any gas

Description : Boyle's law for gases states that (A) P ∝ 1/V, when temperature is constant (B) P ∝ 1/V, when temperature & mass of the gas remain constant (C) P ∝ V, at constant temperature & mass of the gas (D) P/V = constant, for any gas

Last Answer : (B) P ∝ 1/V, when temperature & mass of the gas remain constant

The P/V ratio can be improved by A. Decreasing the selling price per unit B. Increasing variable cost C. Changing the sales mix D. None of the above

Description : The P/V ratio can be improved by A. Decreasing the selling price per unit B. Increasing variable cost C. Changing the sales mix D. None of the above

Last Answer : C. Changing the sales mix

How can you determine the reaction, taking place at constant pressure delta (H) ?

Description : How can you determine the reaction, taking place at constant pressure delta (H) ?

Last Answer : The difference of Enthalpy’s of products and reactants H=Hp-Hr

Dew point can be best defined as the: a. Absolute temperature at which air, upon heating, will evaporate moisture b. . Percentage of moisture that air can hold at a given temperature and pressure c. . Temperature that air will begin to evaporate moisture d. . Temperature at which air, upon cooling, becomes saturated, causing moisture to condense should the temperature drop further e. . Atmospheric pressure at which air will condense moisture

Description : Dew point can be best defined as the: a. Absolute temperature at which air, upon heating, will evaporate moisture b. . Percentage of moisture that air can hold at a given temperature ... to condense should the temperature drop further e. . Atmospheric pressure at which air will condense moisture

Last Answer : Answer: D

Give reason: Steam exerts great pressure on the walls of the piston during expansion stroke.

Description : Give reason: Steam exerts great pressure on the walls of the piston during expansion stroke.

Last Answer : As steam occupies much larger volume than the same amount of water, it exerts great pressure on the walls of the piston.

For a reciprocating pump, the indicator diagram is the graph between the (A) Discharge and overall efficiency (B) Volume swept by piston for one complete revolution and the pressure in the cylinder (C) Angle swept by the crank pin at any instant and the discharge (D) None of these

Description : For a reciprocating pump, the indicator diagram is the graph between the (A) Discharge and overall efficiency (B) Volume swept by piston for one complete revolution and the pressure in the cylinder (C) Angle swept by the crank pin at any instant and the discharge (D) None of these

Last Answer : (B) Volume swept by piston for one complete revolution and the pressure in the cylinder

__________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm2 . (A) Centrifugal (B) Piston (C) Plunger (D) Vane

Description : __________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm2 . (A) Centrifugal (B) Piston (C) Plunger (D) Vane

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Claude process of gas liquefaction employs (A) Merely compression of gas beyond its critical pressure (B) Joule-Thomson expansion cooling (C) Heat exchange with colder stream (D) Adiabatic expansion against a piston or in a turbine

Description : Claude process of gas liquefaction employs (A) Merely compression of gas beyond its critical pressure (B) Joule-Thomson expansion cooling (C) Heat exchange with colder stream (D) Adiabatic expansion against a piston or in a turbine

Last Answer : (D) Adiabatic expansion against a piston or in a turbine

Linde process of gas liquefaction employs (A) Exchange of heat with colder stream (B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion) (C) Adiabatic expansion against a piston or in a turbine (D) Merely compressing the gas beyond its critical pressure

Description : Linde process of gas liquefaction employs (A) Exchange of heat with colder stream (B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion) (C) Adiabatic expansion against a piston or in a turbine (D) Merely compressing the gas beyond its critical pressure

Last Answer : (B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

The piston rod of a hydraulic cylinder exerts an operating force of 10kN. The allowable stress in the cylinder is 45N/mm². Calculate the thickness of the cylinder using Lame’s equation. Diameter of the cylinder is 40mm and pressure in cylinder is 10MPa. a) 2.05mm b) 4.2mm c) 5.07mm d) None of the listed

Description : The piston rod of a hydraulic cylinder exerts an operating force of 10kN. The allowable stress in the cylinder is 45N/mm². Calculate the thickness of the cylinder using Lame's equation. Diameter of the cylinder is 40mm and ... is 10MPa. a) 2.05mm b) 4.2mm c) 5.07mm d) None of the listed

Last Answer : c) 5.07mm

The EGT indication on a piston engine is used: a. To control the cooling air shutters b. To monitor the oil temperature c. To assist the pilot to adjust the fuel mixture d. To indicate cylinder head temperature

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Last Answer : c. To assist the pilot to adjust the fuel mixture

The EGT indication on a piston engine is used: a. To control the cooling air shutters b. To monitor the oil temperature c. To assist the pilot to adjust the fuel mixture d. To indicate cylinder head temperature

Description : The EGT indication on a piston engine is used: a. To control the cooling air shutters b. To monitor the oil temperature c. To assist the pilot to adjust the fuel mixture d. To indicate cylinder head temperature

Last Answer : c. To assist the pilot to adjust the fuel mixture

When you push down on the piston of a bicycle pump, the air is compressed into a smaller volume, which causes its temperature to: w) decrease x) increase y) stay the same

Description : When you push down on the piston of a bicycle pump, the air is compressed into a smaller volume, which causes its temperature to: w) decrease x) increase y) stay the same

Last Answer : ANSWER: X -- INCREASE

o work is done by the system, when a reaction occurs at constant (A) Volume (B) Temperature (C) Pressure (D) None of these

Description : o work is done by the system, when a reaction occurs at constant (A) Volume (B) Temperature (C) Pressure (D) None of these

Last Answer : (A) Volume

An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to (A) 12 P1V1 (B) 6 P1 V1 (C) 3 P1V1 (D) P1 V1

Description : An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to (A) 12 P1V1 (B) 6 P1 V1 (C) 3 P1V1 (D) P1 V1

Last Answer : (C) 3 P1V1