Specific __________ is a dimensionless quantity. (A) Heat (B) Humidity (C) Weight (D) None of these

Specific __________ is a dimensionless quantity.
(A) Heat
(B) Humidity
(C) Weight
(D) None of these
by

1 Answer

Answer :

(D) None of these
by

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The term "relative humidity" applies to a) the percentage of moisture in the air as compared to the amount of moisture the air can hold at a specific temperature b) the weight of the moisture in the air c) the dryness fraction of the air d) the amount of moisture in the air e) the amount of humidity in the air

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Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is (A) 10 atm-1 (B) 105 atm-1 (C) 10 (dimensionless) (D) 105 (dimensionless)

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The quantity of heat required to raise the temperature of a given substance by 1 oC is known as: a) sensible heat b) specific heat c) heat capacity d) latent heat

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Which of the following remains constant during sensible cooling process? (A) Specific humidity (B) Partial pressure of vapour (C) Both (A) and (B)

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Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a (A) Higher dew point (B) Higher absolute (specific) humidity (C) Higher relative humidity (D) Higher wet bulb temperature

Description : Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a (A) Higher dew point (B) Higher absolute (specific) humidity (C) Higher relative humidity (D) Higher wet bulb temperature

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When an unsaturated air-water mixture is heated at constant pressure, then (A) The partial pressure of water vapour increases (B) The specific humidity decreases (C) The relative humidity increases (D) The relative humidity decreases

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. In chemical dehumidification of air (A) Both specific humidity & dry bulb temperature increases (B) Both specific humidity & dry bulb temperature decreases (C) Specific humidity decreases & dry bulb temperature increases (D) Specific humidity increases & dry bulb temperature decreases

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Last Answer : (C) Specific humidity decreases & dry bulb temperature increases

State, whether all constants are dimensionless or unitless.

Description : State, whether all constants are dimensionless or unitless.

Last Answer : State, whether all constants are dimensionless or unitless.

Why the Equilibrium constant is taken as dimensionless?

Description : Why the Equilibrium constant is taken as dimensionless?

Last Answer : Ans. Activities are used in place of molar Conc. These represent the concentration or pressure with respect to standard state.

Sommerfeld number is (A) Similar to bearing characteristic number (B) Similar to Reynold’s number (C) Dimensionless parameter that contains all the design parameters (D) Used to find out dynamic load carrying capacity of the hydrodynamic bearing

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Last Answer : (C) Dimensionless parameter that contains all the design parameters

Euler's dimensionless number relates the following (A) Inertial force and gravity (B) Viscous force and inertial force (C) Viscous force and buoyancy force (D) Pressure force and inertial force

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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

The unit of relative permeability is (a) henry/metre (b) henry (c) henry/sq. m (d) it is dimensionless

Description : The unit of relative permeability is (a) henry/metre (b) henry (c) henry/sq. m (d) it is dimensionless

Last Answer : (d) it is dimensionless

SI unit of gain of amplifier is (a) Volt (b) ampere (c) coulomb (d) dimensionless

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Last Answer : (d) dimensionless

The dimension of strain is a) [L] b) [ML2T –2 ] c) [M L–1 T –2 ] d) Dimensionless

Description : The dimension of strain is a) [L] b) [ML2T –2 ] c) [M L–1 T –2 ] d) Dimensionless

Last Answer : d) Dimensionless

Euler’s dimensionless number relates the following :

Description : Euler’s dimensionless number relates the following : (A) Inertial force and gravity (B) Viscous force and Inertial force (C) Pressure force and Inertial force (D) Pressure force and viscous force

Last Answer : Euler’s dimensionless number relates the following : Pressure force and Inertial force

At a fixed total pressure, humidity depends only on the (A) Partial pressure of vapour in the mixture (B) Heat capacity of the vapour (C) Density of the vapour (D) None of these

Description : At a fixed total pressure, humidity depends only on the (A) Partial pressure of vapour in the mixture (B) Heat capacity of the vapour (C) Density of the vapour (D) None of these

Last Answer : (A) Partial pressure of vapour in the mixture

In psychrometric chart, specific humidity lines are: A. vertical B. horizontal C. inclined D. curved lines

Description : In psychrometric chart, specific humidity lines are: A. vertical B. horizontal C. inclined D. curved lines

Last Answer : ANSWER : B

The ratio of partial pressure of water vapour in a mixture to the saturation pressure of water at the same temperature of the mixture is called as A. humidity B. partial humidity C. specific humidity D. relative humidity

Description : The ratio of partial pressure of water vapour in a mixture to the saturation pressure of water at the same temperature of the mixture is called as A. humidity B. partial humidity C. specific humidity D. relative humidity

Last Answer : ANSWER : D

What is the specific humidity? A. the ratio of the mass of water vapour to the mass of the total mixture of air and water vapour B. the ratio of the mass of dry air to the mass of the total mixture of air and water vapour C. the ratio of the mass of dry air to the mass of water vapour in a mixture of air and water vapour D. the ratio of the mass of water vapour to the mass of dry air in a mixture of air and water vapour

Description : What is the specific humidity? A. the ratio of the mass of water vapour to the mass of the total mixture of air and water vapour B. the ratio of the mass of dry air to the mass of the total mixture ... ratio of the mass of water vapour to the mass of dry air in a mixture of air and water vapour

Last Answer : ANSWER : D

What is the degree of saturation? A. the ratio of the actual relative humidity to the saturated specific humidity at the same temperature B. the ratio of the actual specific humidity to the saturated specific humidity at the same temperature C. the ratio of the saturated specific humidity to the actual specific humidity at the same temperature D. none of the above

Description : What is the degree of saturation? A. the ratio of the actual relative humidity to the saturated specific humidity at the same temperature B. the ratio of the actual specific humidity to the ... specific humidity to the actual specific humidity at the same temperature D. none of the above

Last Answer : ANSWER : B

The specific humidity scale on a psychrometric chart is along the: a. Bottom horizontal axis b. Right side vertical axis c. Top horizontal axis at the top of the chart d. Left saturation line e. Left-side vertical axis and left side

Description : The specific humidity scale on a psychrometric chart is along the: a. Bottom horizontal axis b. Right side vertical axis c. Top horizontal axis at the top of the chart d. Left saturation line e. Left-side vertical axis and left side

Last Answer : Answer: B

Absolute or specific humidity is a) the actual mass of moisture present in a specific amount of air b) the maximum mass of moisture that a specific amount of air can hold c) the ratio of the mass of moisture contained in a specific amount of air to the maximum amount of moisture this specific amount of air can contain d) the mass of moisture present in a specific amount of air at that absolute temperature e) a specific amount of air saturated with moisture

Description : Absolute or specific humidity is a) the actual mass of moisture present in a specific amount of air b) the maximum mass of moisture that a specific amount of air can hold c) the ratio of ... a specific amount of air at that absolute temperature e) a specific amount of air saturated with moisture

Last Answer : ANSWER : A

The moisture content lines in psychrometric chart are also called as A. relative humidity lines B. specific humidity lines C. both a. and b. D. none of the above

Description : The moisture content lines in psychrometric chart are also called as A. relative humidity lines B. specific humidity lines C. both a. and b. D. none of the above

Last Answer : ANSWER : B