If atmospheric temperature and dew point are nearly equal, then the relative humidity is (A) Zero (B) 50% (C) Almost 100% (D) unpredictable

If atmospheric temperature and dew point are nearly equal, then the relative humidity is
(A) Zero
(B) 50%
(C) Almost 100%
(D) unpredictable
by

1 Answer

Answer :

(C) Almost 100%
by

Related questions

When the dew point temperature is equal to the air temperature then the relative humidity is A. 0% B. 50% C. 100% D. unpredictable

Description : When the dew point temperature is equal to the air temperature then the relative humidity is A. 0% B. 50% C. 100% D. unpredictable

Last Answer : ANSWER : C

When the rate of evaporation of water is zero, the relative humidity of the air is A. 0% B. 100% C. 50% D. unpredictable

Description : When the rate of evaporation of water is zero, the relative humidity of the air is A. 0% B. 100% C. 50% D. unpredictable

Last Answer : ANSWER : B

Dry-bulb temperature is: a. The absolute temperature corresponding to the atmospheric pressure b. The same as the wet-bulb temperature if the relative humidity is less than 100% c. Not required to find the relative humidity d. The temperature of the air measured with an ordinary thermometer e. The dew point temperature

Description : Dry-bulb temperature is: a. The absolute temperature corresponding to the atmospheric pressure b. The same as the wet-bulb temperature if the relative humidity is less than 100% c. Not required ... d. The temperature of the air measured with an ordinary thermometer e. The dew point temperature

Last Answer : Answer: D

At 100% relative humidity, the dew point temperature of moist air is (A) Less than the wet bulb temperature (B) More than the wet bulb temperature (C) Equal to the wet bulb temperature (D) Equal to the ambient temperature

Description : At 100% relative humidity, the dew point temperature of moist air is (A) Less than the wet bulb temperature (B) More than the wet bulb temperature (C) Equal to the wet bulb temperature (D) Equal to the ambient temperature

Last Answer : (B) More than the wet bulb temperature

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then (A) Wet bulb temperature=dry bulb temperature (B) Wet bulb temperature=dew point temperature (C) Saturation temperature=dew point temperature (D) All 'a', 'b' & 'c

Description : The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then (A) Wet bulb temperature=dry bulb temperature (B) ... temperature (C) Saturation temperature=dew point temperature (D) All 'a', 'b' & 'c

Last Answer : Option D

At 100% relative humidity, the wet bulb temperature is A. lower than the dew point temperature B. higher than the dew point temperature C. equal to the dew point temperature D. none of the above

Description : At 100% relative humidity, the wet bulb temperature is A. lower than the dew point temperature B. higher than the dew point temperature C. equal to the dew point temperature D. none of the above

Last Answer : ANSWER : C

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

Last Answer : (C) Higher relative humidity

When dew point la reached it is said that at that temperature (a) the atmosphere is said to be saturated with water vapour (b) the relative humidity of the atmosphere is 100% (c) the atmosphere can hold no more water vapour (d) All the above

Description : When dew point la reached it is said that at that temperature (a) the atmosphere is said to be saturated with water vapour (b) the relative humidity of the atmosphere is 100% (c) the atmosphere can hold no more water vapour (d) All the above

Last Answer : Ans: (a)

Wet-bulb temperature is: a. The temperature indicated by a thermometer whose bulb covered by a water-wetted wick and exposed to a rapidly moving stream of air b. The same as the dry-bulb temperature if the relative humidity is less than 100% c. The dew point temperature d. Always less than the dry-bulb temperature e. Not required to find the relative humidity

Description : Wet-bulb temperature is: a. The temperature indicated by a thermometer whose bulb covered by a water-wetted wick and exposed to a rapidly moving stream of air b. The same as the dry-bulb ... point temperature d. Always less than the dry-bulb temperature e. Not required to find the relative humidity

Last Answer : Answer: 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

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the (A) Partial pressure of water vapour is less than the total pressure (B) Humidity is < 100% & dew point temperature of air has not reached (C) Dew point temperature of air has not reached & air is not saturated fully (D) Air is fully saturated

Description : When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the (A) Partial pressure of water vapour is less than the total pressure (B) Humidity is < 100% & dew ... Dew point temperature of air has not reached & air is not saturated fully (D) Air is fully saturated

Last Answer : (D) Air is fully saturated

What is the relative humidity for a saturated air? A. 0% B. 50% C. 100% D. cannot say

Description : What is the relative humidity for a saturated air? A. 0% B. 50% C. 100% D. cannot say

Last Answer : ANSWER : C

Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled (A) And humidified (B) And dehumidified with increase in wet bulb temperature (C) At the same relative humidity (D) And dehumidified with decrease in wet bulb temperature

Description : Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled (A) And ... (C) At the same relative humidity (D) And dehumidified with decrease in wet bulb temperature

Last Answer : (D) And dehumidified with decrease in wet bulb temperature

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

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'

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

What is the dew-point when the dry bulb temperature is 20C and the relative humidity is 17?

Description : What is the dew-point when the dry bulb temperature is 20C and the relative humidity is 17?

Last Answer : at 17% relative humidity the dew point is -5.8C at a dry bulb of20C

_________ is the temperature to which the air must be cooled, at constant pressure, to produce saturation.  a. relative humidity  b. triple point temperature  c. dew point  d. critical point

Description : _________ is the temperature to which the air must be cooled, at constant pressure, to produce saturation.  a. relative humidity  b. triple point temperature  c. dew point  d. critical point

Last Answer : dew point

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

A device for measuring relative humidity is called: a. A dew point analyzer b. An R. H. gauge c. An aspirating gauge d. A psychrometer e. A chronometer

Description : A device for measuring relative humidity is called: a. A dew point analyzer b. An R. H. gauge c. An aspirating gauge d. A psychrometer e. A chronometer

Last Answer : Answer: D

Is define as the ratio of the actual pressure of the vapor  a. Relative Humidity  b. Humidity Ratio  c. Dew Point  d. Adiabatic Saturation

Description : Is define as the ratio of the actual pressure of the vapor  a. Relative Humidity  b. Humidity Ratio  c. Dew Point  d. Adiabatic Saturation

Last Answer : Relative Humidity

A non-reversible machine has efficiency a.less than 50% b.nearly 100% c.between 75% and 99% d.more than 50% e.107 dynes

Description : A non-reversible machine has efficiency a.less than 50% b.nearly 100% c.between 75% and 99% d.more than 50% e.107 dynes

Last Answer : a. less than 50%

With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature). (A) Increases (B) Remains unchanged (C) Decreases (D) Decreases linearly

Description : With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature). (A) Increases (B) Remains unchanged (C) Decreases (D) Decreases linearly

Last Answer : (A) Increases

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

An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is: (A) 0.048 (B) 0.079 (C) 0.122 (D) 0.152

Description : An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively ... air is: (A) 0.048 (B) 0.079 (C) 0.122 (D) 0.152

Last Answer : (D) 0.152

Dew point of an air-water vapor mixture (A) Decreases with decrease in pressure (B) At constant humidity & total pressure is fixed (C) Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve (D) All 'a', 'b' & 'c'

Description : Dew point of an air-water vapor mixture (A) Decreases with decrease in pressure (B) At constant humidity & total pressure is fixed (C) Corresponding to any point on the humidity chart is obtained by projecting a ... to the temperature axis and to the saturation curve (D) All 'a', 'b' & 'c'

Last Answer : (D) All 'a', 'b' & 'c'

Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the rate of (P/4) + 3.0 percentage of water where P is the percentage of water for standard consistency (C) A cube mould of 10 cm × 10 cm × 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Description : Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the ... cm 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Last Answer : Answer: Option A

The curing method is said to be good, when the relative humidity is kept [ A ] Greater than 80% [ B ] Less than 50% [ C ] 50% - 80% [ D ] None of the above

Description : The curing method is said to be good, when the relative humidity is kept [ A ] Greater than 80% [ B ] Less than 50% [ C ] 50% - 80% [ D ] None of the above

Last Answer : [ A ] Greater than 80%

The curing method is said to be good, when the relative humidity is kept [ A ] Greater than 80% [ B ] Less than 50% [ C ] 50% - 80% [ D ] None of the above

Description : The curing method is said to be good, when the relative humidity is kept [ A ] Greater than 80% [ B ] Less than 50% [ C ] 50% - 80% [ D ] None of the above

Last Answer : [ A ] Greater than 80%

Air at a particular humidity is heated in a furnace. The new dew point (A) Decreases (B) Increases (C) Depends on the extent of heating (D) Remain unchanged

Description : Air at a particular humidity is heated in a furnace. The new dew point (A) Decreases (B) Increases (C) Depends on the extent of heating (D) Remain unchanged

Last Answer : (B) Increases

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

The hygrometer is an instrument to measure (a) the relative density of liquids (b) the purity of milk (c) relative humidity (d) atmospheric pressure

Description : The hygrometer is an instrument to measure (a) the relative density of liquids (b) the purity of milk (c) relative humidity (d) atmospheric pressure

Last Answer : Ans:(c)

.A normal-visioned man whose father was colour- blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind? (a) 100% (b) Zero percent (c) 25% (d) 50%

Description : .A normal-visioned man whose father was colour- blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind? (a) 100% (b) Zero percent (c) 25% (d) 50%

Last Answer : Zero percent

A family of five daughter only is expecting sixth issue. The chance of its being a son is (a) zero (b) 25% (c) 50% (d) 100%.

Description : A family of five daughter only is expecting sixth issue. The chance of its being a son is (a) zero (b) 25% (c) 50% (d) 100%.

Last Answer : (c) 50%

A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ? (1) 50% (2) 100% (3) Zero percent (4) 25%

Description : A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind ? (1) 50% (2) 100% (3) Zero percent (4) 25%

Last Answer : (3) Zero percent

What is meant by humidity and dew point ?

Description : What is meant by humidity and dew point ?

Last Answer : Humidity in daily life means relative humidity. Relative humidity is the partial pressure of water vapor in the air of a particular place and the saturated vapor pressure of water vapor at that ... that temperature, the water vapor in the air then turns into dew This temperature is dew point

Also called absolute humidity and specific humidity.  a. Related humidity  b. Humidity ratio  c. Dew point  d. Adiabatic ratio

Description : Also called absolute humidity and specific humidity.  a. Related humidity  b. Humidity ratio  c. Dew point  d. Adiabatic ratio

Last Answer : Humidity ratio

The capacity of the compressor will be highest when its intake temperature is A. Lowest B. highest C. Atmospheric D. Unpredictable

Description : The capacity of the compressor will be highest when its intake temperature is A. Lowest B. highest C. Atmospheric D. Unpredictable

Last Answer : ANSWER : C

The atmospheric pressure with rise in altitude decreases (A) Linearly (B) First slowly and then steeply (C) First steeply and then gradually (D) Unpredictable

Description : The atmospheric pressure with rise in altitude decreases (A) Linearly (B) First slowly and then steeply (C) First steeply and then gradually (D) Unpredictable

Last Answer : Answer: Option B

The percentage humidity is less than the relative humidity only at __________ percent humidity. (A) Zero (B) Hundred (C) Both zero and hundred (D) None of these

Description : The percentage humidity is less than the relative humidity only at __________ percent humidity. (A) Zero (B) Hundred (C) Both zero and hundred (D) None of these

Last Answer : (C) Both zero and hundred

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

Pick up the correct statement from the following: (A) Absolute humidity at a given temperature is equal to weight of moisture present in a unit volume (B) Relative humidity is the ratio of actual vapour pressure and saturation vapour pressure at the same temperature (C) Relative humidity is the ratio of the weight of the vapours present per unit volume to the weight of vapours which could be contained at the same temperature when fully saturated (D) All the above

Description : Pick up the correct statement from the following: (A) Absolute humidity at a given temperature is equal to weight of moisture present in a unit volume (B) Relative humidity is the ratio of ... of vapours which could be contained at the same temperature when fully saturated (D) All the above

Last Answer : Answer: Option D

"100%+50%[equal]0"?

Description : "100%+50%[equal]0"?

Last Answer : answer:Could it possibly mean that you only have 100% and if you say that you are giving 150% than the only way that is possible (mathmatically) is if your 100% is zero to begin with? ... m overthinking it or maybe my rambling brainstorming will trigger the correct answer in someone elses brain :0)

Water will not be vaporized if – (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Description : Water will not be vaporized if – (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Last Answer : (3) the humidity is 100% Explanation: If the relative humidity is 100 percent, water will not evaporate as the air is already saturated with moisture. When relative humidity approaches 100 percent, condensation can occur. The lower the relative humidity, the easier it is for moisture to evaporate.

Water will not be vapourised if (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Description : Water will not be vapourised if (1) the temperature is 0°C (2) the humidity is 0% (3) the humidity is 100% (4) the temperature is 100°C

Last Answer : the humidity is 100% 

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

Which of the following remains constant during evaporative cooling process with recirculated water supply? (A) Relative humidity (B) Partial pressure of vapour (C) Wet bulb temperature (D) None of these

Description : Which of the following remains constant during evaporative cooling process with recirculated water supply? (A) Relative humidity (B) Partial pressure of vapour (C) Wet bulb temperature (D) None of these

Last Answer : (C) Wet bulb temperature

Relative humidity is the ratio of the (A) Partial pressure of the vapour to the vapour pressure of the liquid at room temperature (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature (C) Actual humidity to saturation humidity (D) None of these

Description : Relative humidity is the ratio of the (A) Partial pressure of the vapour to the vapour pressure of the liquid at room temperature (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature (C) Actual humidity to saturation humidity (D) None of these

Last Answer : (B) Partial pressure of the vapour to the vapour pressure of the liquid at gas temperatur

When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity. (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Description : When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity. (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Last Answer : (A) Temperature rises