To remove all the moisture from a wet solid it requires exposure to __________ air. (A) Perfectly dry (B) Highly humid (C) High temperature (D) None of these

To remove all the moisture from a wet solid it requires exposure to

__________ air.

(A) Perfectly dry

(B) Highly humid

(C) High temperature

(D) None of these

by

1 Answer

Answer :

(A) Perfectly dry


by

Related questions

Sweet orange requires a. Dry and semi arid conditions b. Dry and sub humid conditions c. Wet and sub humid conditions b. Non of these

Description : Sweet orange requires a. Dry and semi arid conditions b. Dry and sub humid conditions c. Wet and sub humid conditions b. Non of these

Last Answer : Dry and sub humid conditions

During sensible heating of humid air (A) Relative humidity increases (B) Dew point remains constant (C) Dry bulb & wet bulb temperature increases (D) Both 'b' & 'c'

Description : During sensible heating of humid air (A) Relative humidity increases (B) Dew point remains constant (C) Dry bulb & wet bulb temperature increases (D) Both 'b' & 'c'

Last Answer : (D) Both 'b' & 'c'

Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant (A) Humidity (B) Velocity (C) Temperature (D) All (A), (B) & (C)

Description : Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant (A) Humidity (B) Velocity (C) Temperature (D) All (A), (B) & (C)

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

If moisture content of solid on dry basis is X, then the same on wet basis is (A) X/(X + 1) (B) X/(1 - X) (C) (1 + X)/X (D) (1 - X)/X

Description : If moisture content of solid on dry basis is X, then the same on wet basis is (A) X/(X + 1) (B) X/(1 - X) (C) (1 + X)/X (D) (1 - X)/X

Last Answer : (A) X/(X + 1)

It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%). (A) 15 min (B) 51 min (C) 71 min (D) 94 min

Description : It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The ... 5%). (A) 15 min (B) 51 min (C) 71 min (D) 94 min

Last Answer : (C) 71 min

Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of forced draft cooling tower is reduced by the recirculation of the humid and hot discharged air (C) A natural draft cooling tower is recommended to be used, when the air humidity is low and air temperature is also low (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Description : Pick out the wrong statement pertaining to the cooling towers. (A) In case of induced draft cooling tower, the fan is placed at the top of the tower (B) Effectiveness of ... Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Last Answer : (D) Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature

Humidification is the process of addition moisture in air at A. constant wet bulb temperature B. constant dry bulb temperature C. constant latent heat D. none of the above

Description : Humidification is the process of addition moisture in air at A. constant wet bulb temperature B. constant dry bulb temperature C. constant latent heat D. none of the above

Last Answer : ANSWER : B

The vapour pressure exerted by the moisture contained in a wet solid depends upon the (A) Nature of the moisture (B) Temperature (C) Nature of the solid (D) All (A), (B) and (C)

Description : The vapour pressure exerted by the moisture contained in a wet solid depends upon the (A) Nature of the moisture (B) Temperature (C) Nature of the solid (D) All (A), (B) and (C)

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

The Savannah finds its ideal conditions of growth in: (1) mild and humid climate (2) dry summer and wet winter climate (3) hot humid climate with long dry season (4) hot summer and cool winter climate

Description : The Savannah finds its ideal conditions of growth in: (1) mild and humid climate (2) dry summer and wet winter climate (3) hot humid climate with long dry season (4) hot summer and cool winter climate

Last Answer : (3) hot humid climate with long dry season Explanation: Savanna formations find a favourable growth in form of a hot sub-humid tropical climate, a dry season and a rainy season, with an ... either side of the equator on the edges of tropical rainforests. Savannas have warm temperature year round.

Equatorial regions experience – (1) warm and dry climate (2) hot and humid climate (3) wet and windy climate (4) moderately pleasant climate

Description : Equatorial regions experience – (1) warm and dry climate (2) hot and humid climate (3) wet and windy climate (4) moderately pleasant climate

Last Answer : (2) hot and humid climate Explanation: The temperature of the equatorial regions is hot throughout the year, with a very low temperature range usually of less than 3 degrees celsius. Tropical rainforest ... ; it is typically hot and wet throughout the year and rainfall is both heavy and frequent.

The Savannah finds its ideal conditions of growth in : (1) mild and humid climate (2) dry summer and wet winter climate (3) hot humid climate with long dry season (4) hot summer and cool winter climate

Description : The Savannah finds its ideal conditions of growth in : (1) mild and humid climate (2) dry summer and wet winter climate (3) hot humid climate with long dry season (4) hot summer and cool winter climate

Last Answer : hot humid climate with long dry season

Equatorial regions experience (1) warm and dry climate (2) hot and humid climate (3) wet and windy climate (4) moderately pleasant climate

Description : Equatorial regions experience (1) warm and dry climate (2) hot and humid climate (3) wet and windy climate (4) moderately pleasant climate

Last Answer : hot and humid climate

Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent? (A) Cooling and dehumidification (B) Heating and dehumidification at almost constant wet bulb temperature (C) Dehumidification with dry bulb temperature remaining constant (D) None of these

Description : Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent? (A) Cooling and dehumidification ... (C) Dehumidification with dry bulb temperature remaining constant (D) None of these

Last Answer : (B) Heating and dehumidification at almost constant wet bulb temperature

Wet grinding in a revolving mill __________ as compared to dry grinding. (A) Gives less wear on chamber walls (B) Requires more energy (C) Increases capacity (D) Complicates handling of the product

Description : Wet grinding in a revolving mill __________ as compared to dry grinding. (A) Gives less wear on chamber walls (B) Requires more energy (C) Increases capacity (D) Complicates handling of the product

Last Answer : (C) Increases capacity

Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is important in problems involving gas absorption without chemical reaction (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion (D) Total reflux in case of distillation operation requires infinite number of plates for a binary system separation

Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation

Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion

In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure to the air with a wet bulb temperature of 60°C, then both the approach & the range would be 10°C (C) For unsaturated air-water vapor mixture at atmospheric conditions, the wet bulb temperature & adiabatic cooling lines are the same (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

Description : Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure ... & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

Last Answer : (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the (A) Range is 15°F (B) Approach is 10°F (C) Both (A) & (B) (D) Neither (A) nor (B)

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

Pick out the correct statement. (A) Bound moisture is removed during constant rate drying period (B) Free moisture is removed during falling rate drying period (C) The sum of free moisture and equilibrium moisture in a solid is called the critical moisture (D) The driving force for mass transfer in a wet solid is its free moisture content

Description : Pick out the correct statement. (A) Bound moisture is removed during constant rate drying period (B) Free moisture is removed during falling rate drying period (C) The sum of free moisture and ... (D) The driving force for mass transfer in a wet solid is its free moisture content

Last Answer : (D) The driving force for mass transfer in a wet solid is its free moisture content

Dry bulb temperature of unsaturated air is more than its __________ temperature. (A) Dew point (B) Wet bulb (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Description : Dry bulb temperature of unsaturated air is more than its __________ temperature. (A) Dew point (B) Wet bulb (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Last Answer : (C) Both 'a' & 'b

The temperature of water cooled in cooling tower is always __________ temperature of entering air. (A) More than the wet bulb (B) Less than the wet bulb (C) Equal to the wet bulb (D) Equal to the dry bulb

Description : The temperature of water cooled in cooling tower is always __________ temperature of entering air. (A) More than the wet bulb (B) Less than the wet bulb (C) Equal to the wet bulb (D) Equal to the dry bulb

Last Answer : (A) More than the wet bulb

The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air. (A) Ambient (B) Dry bulb (C) Dew point (D) Wet bulb

Description : The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air. (A) Ambient (B) Dry bulb (C) Dew point (D) Wet bulb

Last Answer : C) Dew point

Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs? (A) Enthalpy (B) Relative humidity (C) Wet bulb temperature (D) Dew point temperature

Description : Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs? (A) Enthalpy (B) Relative humidity (C) Wet bulb temperature (D) Dew point temperature

Last Answer : (D) Dew point temperature

__________ temperature remains constant during adiabatic saturation process of unsaturated air. (A) Dew point (B) Dry bulb (C) Wet bulb (D) None of these

Description : __________ temperature remains constant during adiabatic saturation process of unsaturated air. (A) Dew point (B) Dry bulb (C) Wet bulb (D) None of these

Last Answer : (C) Wet bulb

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air. (A) Wet bulb (B) Dry bulb (C) Saturation (D) Dew point

Description : Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air. (A) Wet bulb (B) Dry bulb (C) Saturation (D) Dew point

Last Answer : Option A

The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity. (A) 0 (B) 100 (C) 50 (D) None of these

Description : The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity. (A) 0 (B) 100 (C) 50 (D) None of these

Last Answer : Option B

psychrometer does not measure the __________ temperature of moist air. (A) Dew point (B) Dry bulb (C) Wet bulb (D) None of these

Description : psychrometer does not measure the __________ temperature of moist air. (A) Dew point (B) Dry bulb (C) Wet bulb (D) None of these

Last Answer : Option A

The dew point of moist air becomes __________ with decrease in its relative humidity. (A) Less than the wet bulb temperature (B) More than the wet bulb temperature (C) More than the dry bulb temperature (D) Equal to wet bulb temperature

Description : The dew point of moist air becomes __________ with decrease in its relative humidity. (A) Less than the wet bulb temperature (B) More than the wet bulb temperature (C) More than the dry bulb temperature (D) Equal to wet bulb temperature

Last Answer : Option A

__________ remains constant during the adiabatic cooling of moist air. (A) Wet bulb temperature (B) Dry bulb temperature (C) Relative humidity (D) Specific humidity

Description : __________ remains constant during the adiabatic cooling of moist air. (A) Wet bulb temperature (B) Dry bulb temperature (C) Relative humidity (D) Specific humidity

Last Answer : Option A

Weight of 1 m3 of humid air as compared to 1 m3 of dry air, under the same conditions, is (A) Less (B) More (C) Same (D) Unpredictable

Description : Weight of 1 m3 of humid air as compared to 1 m3 of dry air, under the same conditions, is (A) Less (B) More (C) Same (D) Unpredictable

Last Answer : (A) Less

Pick out the wrong statement. (A) The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr= 1 (B) 1 Nm3 of dry air is lighter than 1Nm3 of humid air (C) The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity

Description : Pick out the wrong statement. (A) The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr= 1 (B) 1 Nm3 of dry air is lighter ... ) The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity

Last Answer : (B) 1 Nm3 of dry air is lighter than 1Nm3 of humid air

In case of a revolving mill, wet grinding compared to dry grinding (A) Requires more energy (B) Has less capacity (C) Complicates handling & classification of the product (D) None of these

Description : In case of a revolving mill, wet grinding compared to dry grinding (A) Requires more energy (B) Has less capacity (C) Complicates handling & classification of the product (D) None of these

Last Answer : (D) None of these

Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature. (A) Less than (B) More than (C) Equal to (D) Either (A) or (B); depends on the solid

Description : Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature. (A) Less than (B) More than (C) Equal to (D) Either (A) or (B); depends on the solid

Last Answer : (A) Less than

Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Description : Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. (A) Unbound (B) Critical (C) Free (D) Bound

Last Answer : (A) Unbound

Researchers describe seed moisture contents in terms of : a. Dry weight b. Wet weight c. Percent weight d. a & b

Description : Researchers describe seed moisture contents in terms of : a. Dry weight b. Wet weight c. Percent weight d. a & b

Last Answer : a & b

Pick up the incorrect statement from the following: (A) Compaction has no effect on the structure of a soil (B) Permeability decreases with increase in the dry density of a compacted soil (C) A wet side compacted soil is more compressible than a dry side compacted soil (D) Dry side compaction soils swell more when given access to moisture

Description : Pick up the incorrect statement from the following: (A) Compaction has no effect on the structure of a soil (B) Permeability decreases with increase in the dry density of a compacted soil (C) ... a dry side compacted soil (D) Dry side compaction soils swell more when given access to moisture

Last Answer : (A) Compaction has no effect on the structure of a soil

For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as (A) Dry of OMC and wet of OMC (B) Wet of OMC and dry of OMC (C) Wet of OMC and wet of OMC (D) Dry of OMC and dry of OMC where OMC is optimum moisture content

Description : For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as (A) Dry of OMC and wet of OMC (B) Wet of OMC and dry of OMC (C) Wet of OMC and wet of OMC (D) Dry of OMC and dry of OMC where OMC is optimum moisture content

Last Answer : Answer: Option B

When there is sufficient power available some soil types are ploughed ………… A. Wet. C) Dry B. Moisture. D) Non of the above.

Description : When there is sufficient power available some soil types are ploughed ………… A. Wet. C) Dry B. Moisture. D) Non of the above.

Last Answer : Dry

__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction. (A) Gas film diffusion (B) Ash diffusion (C) Chemical reaction (D) None of these

Description : __________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction. (A) Gas film diffusion (B) Ash diffusion (C) Chemical reaction (D) None of these

Last Answer : (C) Chemical reaction

During the constant rate period of drying of a solid, (A) Increased air humidity decreases the rate of drying (B) Increasing the air temperature decreases the drying rate (C) Surface evaporation of unbound moisture occurs (D) None of these

Description : During the constant rate period of drying of a solid, (A) Increased air humidity decreases the rate of drying (B) Increasing the air temperature decreases the drying rate (C) Surface evaporation of unbound moisture occurs (D) None of these

Last Answer : (C) Surface evaporation of unbound moisture occurs

Both hydrarch and xerarch successions lead to (a) medium water conditions (b) xeric conditions (c) highly dry conditions (d) excessive wet conditions.

Description : Both hydrarch and xerarch successions lead to (a) medium water conditions (b) xeric conditions (c) highly dry conditions (d) excessive wet conditions.

Last Answer : (a) medium water conditions

"Dry ice" is (A) Moisture free ice (B) Solid helium (C) Solid carbon dioxide (D) None of these

Description : "Dry ice" is (A) Moisture free ice (B) Solid helium (C) Solid carbon dioxide (D) None of these

Last Answer : (C) Solid carbon dioxide

The property of a substance to absorb moisture from the air on exposure is called------? A. osmosis B. deliquescence (Answer) C. efflorescence D. desiccation

Description : The property of a substance to absorb moisture from the air on exposure is called------? A. osmosis B. deliquescence (Answer) C. efflorescence D. desiccation

Last Answer : B. deliquescence (Answer)

Air coolers are more suitable for – (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate

Description : Air coolers are more suitable for – (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate

Last Answer : (2) hot and dry climate Explanation: An air cooler works on the simple principle of evaporation. It does not yield good results when humidity is high. On the contrary, the temperature of dry ... liquid water to water vapor (evaporation), which can cool air using much less energy than refrigeration.

Air coolers are more suitable for (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate

Description : Air coolers are more suitable for (1) hot and humid climate (2) hot and dry climate (3) cool and humid climate (4) cool and dry climate

Last Answer :  hot and dry climate

A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1is (A) -1.87 (B) 0 (C) 1.26 (D) 3.91

Description : A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. ... .kg-1, K-1is (A) -1.87 (B) 0 (C) 1.26 (D) 3.91

Last Answer : (B) 0

Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate. (A) Increases (B) Decreases (C) Does not affect

Description : Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate. (A) Increases (B) Decreases (C) Does not affect

Last Answer : (B) Decreases

Which of the following does not discharge the dust collected as a dry solid? (A) Electrostatic precipitator (B) Wet scrubber (C) Bag filter (D) Gravity settling chamber

Description : Which of the following does not discharge the dust collected as a dry solid? (A) Electrostatic precipitator (B) Wet scrubber (C) Bag filter (D) Gravity settling chamber

Last Answer : (B) Wet scrubber