Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam. (A) Bomb (B) Separating (C) Bucket (D) Throttling

Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.
(A) Bomb
(B) Separating
(C) Bucket
(D) Throttling
by

1 Answer

Answer :

A) Bomb
by

Related questions

__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low. (A) Bucket (B) Throttling (C) Separating (D) A combination of separating & throttling

Description : __________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low. (A) Bucket (B) Throttling (C) Separating (D) A combination of separating & throttling

Last Answer : (D) A combination of separating & throttling

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Description : Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter. (A) Bomb (B) Throttling (C) Junker's (D) Boy's

Last Answer : Option B

Defined as the ratio of weight of dry steam to the weight of stuff.  a. dryness fraction  b. Vaporization  c. fusion  d. super heated steam

Description : Defined as the ratio of weight of dry steam to the weight of stuff.  a. dryness fraction  b. Vaporization  c. fusion  d. super heated steam

Last Answer : dryness fraction

When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively (A) Decreases & increases (B) Increases & increases (C) Increases & decreases (D) Decreases & decreases

Description : When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively (A) Decreases & increases (B) Increases & increases (C) Increases & decreases (D) Decreases & decreases

Last Answer : (A) Decreases & increases

Determine the amount of heat required to produce 1Kg of steam at a pressure of 7 bar, at a temperature 29 degree Celsius, under the following . (i) When the steam is wet having dryness fraction 0.87 (ii) When the steam is dry saturated Assume specific heat = 2.35KJ/KgK

Description : Determine the amount of heat required to produce 1Kg of steam at a pressure of 7 bar, at a temperature 29 degree Celsius, under the following . (i) When the steam is wet having dryness fraction 0.87 (ii) When the steam is dry saturated Assume specific heat = 2.35KJ/KgK 

Last Answer : P 7bar T 29ᵒC x=0.9 m =1kg C p =2.35 KJ/KgK At pressure 7 bar saturation Temp T sat =165 ᵒC h f =697.2 KJ/Kg h fg= 2064.8 KJ/Kg i) Heat required when steam is wet ... ) When the stem is dry saturated hg=hf+hfg =2762 kj Heat actually required = 2762-121.8 = 2640.2 kj

(i) Draw the neat sketch of bomb calorimeter. (ii) Write any three sources of air leakage in steam condenser.

Description : (i) Draw the neat sketch of bomb calorimeter. (ii) Write any three sources of air leakage in steam condenser.

Last Answer : (i)   (ii) Sources of air leakage in condenser: i) Air leak through joints and packing. ii) Air also comes in condenser with the steam. iii) In jet condensers dissolved air in the cooling water enters the condenser. 

The best method of determining sulphur in crude oil is by the __________ method. (A) Kjeldahl (B) Dumas (C) Bomb calorimeter (D) Junkers calorimeter

Description : The best method of determining sulphur in crude oil is by the __________ method. (A) Kjeldahl (B) Dumas (C) Bomb calorimeter (D) Junkers calorimeter

Last Answer : (C) Bomb calorimeter

Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter. (A) Bomb (B) Boy's (C) Junkers (D) None of these

Description : Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter. (A) Bomb (B) Boy's (C) Junkers (D) None of these

Last Answer : (A) Bomb

Bomb calorimeter is used for the determination of calorific value of the __________ fuels. (A) Gaseous (B) Solid(C) Liquid(D) Both (B) and (C)

Description : Bomb calorimeter is used for the determination of calorific value of the __________ fuels. (A) Gaseous (B) Solid (C) Liquid (D) Both (B) and (C)

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

Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. (A) 3-5 (B) 25-30 (C) 60-65 (D) 95-100

Description : Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm. (A) 3-5 (B) 25-30 (C) 60-65 (D) 95-100

Last Answer : (B) 25-30

Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter. (A) Junker's (B) Bomb (C) Boy's (D) None of these

Description : Calorific value of both the solid & liquid fuels can be determined by using __________ calorimeter. (A) Junker's (B) Bomb (C) Boy's (D) None of these

Last Answer : (B) Bomb

Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Bomb calorimeter can be used to determine the __________ of the coal. (A) Sulphur content (B) Calorific value (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Wet steam at 1 MPa flowing through a pipe is throttled to a pressure of 0.1 MPa. If the throttling temperature is110°C, What is the quality of the steam in the pipe?  a) 96%  b) 86%  c) 76%  d) 66%

Description : Wet steam at 1 MPa flowing through a pipe is throttled to a pressure of 0.1 MPa. If the throttling temperature is110°C, What is the quality of the steam in the pipe?  a) 96%  b) 86%  c) 76%  d) 66%

Last Answer : 96%

Represent generation of steam on H-S diagram. Show constant dryness fraction lines, constant temperature lines, saturated line and superheated region on the same.

Description : Represent generation of steam on H-S diagram. Show constant dryness fraction lines, constant temperature lines, saturated line and superheated region on the same.

Last Answer : Represent generation of steam on H-S diagram. Show constant dryness fraction lines, constant temperature lines, saturated line and superheated region on the same.

A sample of 35 Kg of dry steam contains 0.7 Kg of water is in suspension, find its dryness fraction.

Description : A sample of 35 Kg of dry steam contains 0.7 Kg of water is in suspension, find its dryness fraction. 

Last Answer : Mass of dry steam=35 kg Mass water suspension=0.7 kg Weight of wet steam=35+0.7=35.7 kg So,  Dryness fraction X=Actual mass of dry steam/ weight of wet steam  = 35 / (35+0.7)  =0.098039

The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature. (A) Dew point (B) Wet bulb (C) Dry bulb (D) None of these

Description : The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature. (A) Dew point (B) Wet bulb (C) Dry bulb (D) None of these

Last Answer : (D) None of these

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature. (A) Dry-bulb (B) Wet-bulb (C) Dew point (D) Adiabatic saturation

Description : Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature. (A) Dry-bulb (B) Wet-bulb (C) Dew point (D) Adiabatic saturation

Last Answer : (B) Wet-bulb

The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Description : The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25

Last Answer : (B) > 25

While separating a mixture of ortho and para-nitro phenols by steam distillation, name the isomer which will be steam volatile. Give reasons.

Description : While separating a mixture of ortho and para-nitro phenols by steam distillation, name the isomer which will be steam volatile. Give reasons.

Last Answer : In o-nitrophenol, there is intramolecular hydrogen bonding as follows : In p-nitrophenol, there is intramolecular hydrogen bonding as follows :   Due to intermolecular H ... -nitrophenol. Hence o-nitraphenol due to its lower b. p. is steam volatile while pnitrophenol is not.

The 'bomb' in the bomb calorimeter is made of (A) Molybdenum stainless steel(B) Mild steel(C) High silicon iron (14% Si)(D) Copper

Description : The 'bomb' in the bomb calorimeter is made of (A) Molybdenum stainless steel (B) Mild steel (C) High silicon iron (14% Si) (D) Copper

Last Answer : (A) Molybdenum stainless steel

During its calorific value determination by bomb calorimeter, coal is combusted by (A) Air (B) Oxygen (C) Oxygen enriched air (D) None of these

Description : During its calorific value determination by bomb calorimeter, coal is combusted by (A) Air (B) Oxygen (C) Oxygen enriched air (D) None of these

Last Answer : (C) Oxygen enriched air

Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.) (A) GCV at constant pressure (B) GCV at constant volume (C) NCV at constant pressure (D) NCV at constant volume

Description : Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.) (A) GCV at constant pressure (B) GCV at constant volume (C) NCV at constant pressure (D) NCV at constant volume

Last Answer : (C) NCV at constant pressure

Calorific value as determined by bomb calorimeter is the (A) Higher calorific value at constant volume(B) Gross calorific value at constant pressure(C) Lower calorific value at constant pressure(D) Net calorific value at constant volume

Description : Calorific value as determined by bomb calorimeter is the (A) Higher calorific value at constant volume (B) Gross calorific value at constant pressure (C) Lower calorific value at constant pressure (D) Net calorific value at constant volume

Last Answer : (A) Higher calorific value at constant volume

The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to (A) Minimise its corrosion (B) Avoid radiation heat loss (C) Make it look attractive (D) None of these

Description : The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to (A) Minimise its corrosion (B) Avoid radiation heat loss (C) Make it look attractive (D) None of these

Last Answer : (B) Avoid radiation heat loss

Calorific value of proteins in a living person is less than that in a bomb calorimeter because (A) Digestion and absorption of proteins is less than 100% (B) Respiratory quotient of proteins is less than 1 (C) Specific dynamic action of proteins is high (D) Proteins are not completely oxidized in living persons

Description : Calorific value of proteins in a living person is less than that in a bomb calorimeter because (A) Digestion and absorption of proteins is less than 100% (B) Respiratory quotient of proteins ... Specific dynamic action of proteins is high (D) Proteins are not completely oxidized in living persons

Last Answer : Answer : D

Calorific value of proteins as determined in a bomb calorimeter is (A) 4 kcal/gm (B) 4.8 kcal/gm (C) 5.4 kcal/gm (D) 5.8 kcal/gm

Description : Calorific value of proteins as determined in a bomb calorimeter is (A) 4 kcal/gm (B) 4.8 kcal/gm (C) 5.4 kcal/gm (D) 5.8 kcal/gm

Last Answer : Answer : C

Describe with neat sketch of working of bomb calorimeter

Description : Describe with neat sketch of working of bomb calorimeter

Last Answer : working of bomb calorimeter:   The calorimeter is made of austenitic steel which provides considerable resistant to corrosion and enables it to withstand high pressure. In the calorimeter use of a strong ... the calorimeter. From the above data the calorific value of the fuel can be found.  

(i) Explain construction and working of geothermal power plant. (ii) Explain the construction and working of bomb calorimeter.

Description : (i) Explain construction and working of geothermal power plant. (ii) Explain the construction and working of bomb calorimeter.

Last Answer : (i) Geothermal power plant: Construction and Working: geothermal power plant which consists of the following main components: Underground steam storage, steam separator, steam separator, turbine and Generator. Steam is ... . From the above data the calorific value of the fuel can be found. 

Relative humidity is a) the ratio of water vapour in the air compared to the total amount water vapour the air could contain at a given temperature b) equal to the dry bulb temperature divided by the wet bulb temperature c) equal to the wet bulb temperature divided by the dry bulb temperature d) the ratio of the mass of water vapour divided by the mass of dry air e) the ratio of the mass of water vapour divided by the mass of wet air

Description : Relative humidity is a) the ratio of water vapour in the air compared to the total amount water vapour the air could contain at a given temperature b) equal to the dry bulb temperature divided by the wet bulb ... of dry air e) the ratio of the mass of water vapour divided by the mass of wet air

Last Answer : ANSWER : A

The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the components with a stationary and a mobile phases C. the absorption of infrared radiation by the components. D. the deflection of charged particles in a magnetic field.

Description : The basis of the technique of chromatography for separating components of a mixture is? A. the differing movement of particles of different mass in an electrical field B. the interaction of the ... infrared radiation by the components. D. the deflection of charged particles in a magnetic field. 

Last Answer : the interaction of the components with a stationary and a mobile phases

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

The condition of refrigerant before entering the expansion or throttle valve, in a vapour compression system (a) dry vapour (b) wet vapour (c)liquid-vapour mixture (d) high pressure saturated liquid

Description : The condition of refrigerant before entering the expansion or throttle valve, in a vapour compression system (a) dry vapour (b) wet vapour (c)liquid-vapour mixture (d) high pressure saturated liquid

Last Answer : Ans: d

When dry bulb temperature (DBT) and wet bulb temperature (WBT) are measured, greater the difference between DBT and WBT, A. greater the amount of water vapour held in the mixture B. smaller the amount of water vapour held in the mixture C. same the amount of water vapour held in the mixture D. none of the above

Description : When dry bulb temperature (DBT) and wet bulb temperature (WBT) are measured, greater the difference between DBT and WBT, A. greater the amount of water vapour held in the mixture B. smaller the amount of ... the mixture C. same the amount of water vapour held in the mixture D. none of the above

Last Answer : ANSWER : B

An indication of sensible heat content in air-water vapour mixture is a) wet bulb temperature b) dew point temperature c) density of air d) dry bulb temperature

Description : An indication of sensible heat content in air-water vapour mixture is a) wet bulb temperature b) dew point temperature c) density of air d) dry bulb temperature

Last Answer : d) dry bulb temperature

One of the purposes of sub-cooling the liquid refrigerant is to (a) reduce compressor overheating (b) reduce compressor discharge temperature (c) increase cooling effect (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve

Description : One of the purposes of sub-cooling the liquid refrigerant is to (a) reduce compressor overheating (b) reduce compressor discharge temperature (c) increase cooling effect (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve

Last Answer : Ans: d

Domestic refrigerator working on vapour compression cycle uses the following type of expansion device (a) electrically operated throttling valve (b) manually operated valve (c) thermostatic valve (d) capillary tube

Description : Domestic refrigerator working on vapour compression cycle uses the following type of expansion device (a) electrically operated throttling valve (b) manually operated valve (c) thermostatic valve (d) capillary tube

Last Answer : Ans: d

If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as  (a) free expansion  (b) hyperbolic expansion  (c) adiabatic expansion  (d) parabolic expansion  (e) throttling.

Description : If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as  (a) free expansion  (b) hyperbolic expansion  (c) adiabatic expansion  (d) parabolic expansion  (e) throttling.

Last Answer : Answer : e

What device measures rf power by measuring the heat the rf power generates? A. Calorimeter B. Goniometer C. Spectrum meter D. Oscilloscope

Description : What device measures rf power by measuring the heat the rf power generates? A. Calorimeter B. Goniometer C. Spectrum meter D. Oscilloscope

Last Answer : A. Calorimeter

Pick out the correct statement about the condensation. (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation (B) Suitable coating or vapour additive is used to promote film wise condensation (C) If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it (D) Reynolds number of condensing liquid is based on its mass flow rate

Description : Pick out the correct statement about the condensation. (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation (B) Suitable coating or vapour additive is used to promote film ... place on it (D) Reynolds number of condensing liquid is based on its mass flow rate

Last Answer : (B) Suitable coating or vapour additive is used to promote film wise condensation

A steam calorimeter receives steam from a pipe at 0.1 MPa and 20°SH. For a pipe steam pressure of 2 MPa, what is the quality of the steam?  a) 95.56%  b) 70.10%  c) 95.20%  d) 85.10% Formula: h1 = hf1 + x1hfg1

Description : A steam calorimeter receives steam from a pipe at 0.1 MPa and 20°SH. For a pipe steam pressure of 2 MPa, what is the quality of the steam?  a) 95.56%  b) 70.10%  c) 95.20%  d) 85.10% Formula: h1 = hf1 + x1hfg1

Last Answer : 265.4°C, 430.7kJ/kg, 71.4kJ/kg, 1.0327kJ/(kg)(K),502.1 kJ/kg

Mixture of liquid and steam of the same substance in which both are at saturation temperature.  a. dry steam  b. current steam  c. wet steam  d. aerosol

Description : Mixture of liquid and steam of the same substance in which both are at saturation temperature.  a. dry steam  b. current steam  c. wet steam  d. aerosol

Last Answer : wet steam

During throttling process  (a) heat exchange does not take place  (b) no work is done by expanding steam  (c) there is no change of internal energy of steam  (d) all of the above  (e) entropy decreases.

Description : During throttling process  (a) heat exchange does not take place  (b) no work is done by expanding steam  (c) there is no change of internal energy of steam  (d) all of the above  (e) entropy decreases.

Last Answer : Answer : d

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

Description : 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) ... of the air d) the amount of moisture in the air e) the amount of humidity in the air

Last Answer : ANSWER : A

Define i)Dryness fraction ii) Degree of superheat

Description : Define i)Dryness fraction ii) Degree of superheat

Last Answer : i)Dryness fraction: Dryness fraction is defined ratio of the mass of the dry steam present in the total mass of steam.  Or  Dryness fraction is ratio of the mass of actual dry ... Superheated Steam and the saturation temperature correspondingly to given pressure is said to be Degree of Superheat. 

Which of the following can be calculated theoretically using steam table and Dalton's law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known? (A) Dew point (B) Humidity ratio (C) Wet bulb temperature (D) None of these

Description : Which of the following can be calculated theoretically using steam table and Dalton's law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known? (A) Dew point (B) Humidity ratio (C) Wet bulb temperature (D) None of these

Last Answer : (C) Wet bulb temperature

A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C. (A) 21.7 (B) 20 (C) 27.3 (D) 18.7

Description : A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C. (A) 21.7 (B) 20 (C) 27.3 (D) 18.7

Last Answer : (D) 18.7

The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

Description : The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

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

At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent. (A) 100 (B) 0 (C) 50 (D) Between 0 and 100

Description : At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent. (A) 100 (B) 0 (C) 50 (D) Between 0 and 100

Last Answer : (B) 0

Dew point temperature always gives an indication of the __________ of the moist air. (A) Dryness (B) Moisture content (C) Coolness (D) Latent heat

Description : Dew point temperature always gives an indication of the __________ of the moist air. (A) Dryness (B) Moisture content (C) Coolness (D) Latent heat

Last Answer : (B) Moisture content

Pick out the wrong statement: (A) Magnetic separation method can be employed to treat both dry & wet ores (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size (C) Gyratory crusher is used for coarse crushing (D) Screens are of stationary, moving and vibratory types

Description : Pick out the wrong statement: (A) Magnetic separation method can be employed to treat both dry & wet ores (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed ... ) Gyratory crusher is used for coarse crushing (D) Screens are of stationary, moving and vibratory types

Last Answer : (B) Reduction ratio in crushing operation is defined as the ratio of minimum feed size to the maximum product size