Description : The humidity of air measured in percentage is called – (1) absolute humidity (2) specific humidity (3) relative humidity (4) all of these
Last Answer : (3) relative humidity Explanation: The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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
Description : Amount of water vapour in a unit volume (Cubic metre) of air is called: (1) Mixed ratio (2) relative humidity (3) absolute humidity (4) specific humidity
Last Answer : (3) absolute humidity Explanation: Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).
Description : The mass of water vapour per unit volume of air is known as - (1) relative humidity (2) specific humidity (3) absolute humidity (4) variable humidity
Description : Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as: (1) Mixing ratio (2) Relative humidity (3) Absolute humidity (4) Specific humidity
Last Answer : (3) Absolute humidity Explanation: The relative humidity of air at a given temperature is the ratio of mass of water vapour actually present in a certain volume of air to the mass of water vapour required to saturate the same volume of air at the same temperature, multiplied by 100.
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
Description : The actual mass of water vapour present in a given volume of moist air is — a. Relative humidity b. Absolute humidity c. Specific humidity d. All of these
Last Answer : b. Absolute humidity
Last Answer : Absolute humidity
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
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
Description : The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls
Description : What is the relative humidity when the absolute humidity is 3 grams per cubic meter and the air has a capacity of 12 grams per cubic meter? w) 4% x) 9% y) 25% z) 400%
Last Answer : ANSWER: Y -- 25%
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
Description : Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in ... (A) Molal (B) Relative (C) Percentage (D) None of these
Last Answer : (A) Mola
Description : Pick out the wrong statement: (A) Change in barometric pressure does not affect the relative humidity (B) In case of a packed tower, the operating velocity is about half of the ... (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity
Last Answer : (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity
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
Description : _________is the partial pressure of water vapor at the existing temperature divided by the equilibrium vapor pressure of water at the existing temperature. a. vacuum pressure b. relative humidity c. absolute pressure d. vapor pressure
Last Answer : relative humidity
Description : 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
Last Answer : D) The relative humidity decreases
Description : The temperature at which water boils depends mainly on ------? A. Air temperature B. Relative humidity C. Air pressure (Answer) D. Air density E. The specific heat of air
Last Answer : C. Air pressure (Answer)
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
Description : Relative humidity (RH) is measured by
Last Answer : Ans. Hygrometer/Psychrometer
Description : Also called absolute humidity and specific humidity. a. Related humidity b. Humidity ratio c. Dew point d. Adiabatic ratio
Last Answer : Humidity ratio
Description : What is considered as the actual pressure at a given position and is measured relative to absolute vacuum? A. Gage pressure B. Absolute pressure C. Atmospheric pressure D. Vacuum pressure
Last Answer : Absolute pressure
Description : The term absolute Pressure is used for a pressure measured relative to: - a) vacuum pressure b) some fixed pressure c) atmospheric d) all the above
Last Answer : The term absolute Pressure is used for a pressure measured relative to: - vacuum pressure
Description : Relative humidity is expressed as – (1) Grams (2) Kilograms (3) Percentage (4) Ratio
Last Answer : (3) Percentage Explanation: Relative humidity is the amount of moisture in the air compared to what the air can "hold" at that temperature. It signifies the mass of water vapour present in the air ... of the mass that would be present in an equal volume of saturated air at the same temperature.
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
Description : Relative humidity is express in — a. g/m3 b. g/kg c. Percentage d. None of these
Last Answer : c. Percentage
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
Description : Relative humidity is expressed as (1) Grams (2) Kilograms (3) Percentage (4) Ratio
Last Answer : Percentage
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
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
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
Description : Hydrometer is used to determine (A) Specific gravity of liquids (B) Specific gravity of solids (C) Specific gravity of gases (D) Relative humidity
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
Description : Absolute humidity in air (A) Decreases at higher altitudes (B) Increases at higher altitudes (C) Remains constant at all altitudes (D) None of these
Description : Heat stored in water vapour is – (1) specific heat (2) latent heat (3) absolute heat (4) relative heat
Last Answer : (2) latent heat Explanation: Latent heat is the heat released or absorbed by a body or a thermodynamic system during a process that occurs without a change in temperature. A typical example is a ... the boiling of water. So water vapor which is the end product of evaporated water has latent heat.
Description : Heat stored in water vapour is (1) specific heat (2) latent heat (3) absolute heat (4) relative heat
Last Answer : latent heat
Description : What is a weather balloon device for measuring air pressure temperature and relative humidity is called?
Last Answer : A+ Radiosonde
Description : Which instrument used for measuring relative humidity in air? -Do You Know?
Last Answer : hygrometer A hygrometer is an instrument used to measure relative humidity. Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer.
Description : What does it mean for the relative humidity of and air mass to be 70?
Last Answer : Need answer
Description : If the air is only holding one-third as much moisture as it can possibly hold what is the relative humidity?
Last Answer : 35
Description : What is the relative humidity for a saturated air? A. 0% B. 50% C. 100% D. cannot say
Last Answer : ANSWER : C
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
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
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
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
Description : The instrument that measures and records the relative humidity of air is – (1) Hydrometer (2) Hygrometer (3) Lactometer (4) Barometer
Last Answer : (2) Hygrometer Explanation: A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other ... By calibration and calculation, these measured quantities can lead to a measurement of humidity.
Description : A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process? (A) Flow rate of inlet air (B) Relative humidity of outlet air (C) Humidity of inlet air (D) Temperature of the solid
Last Answer : (D) Temperature of the solid
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
Description : During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains ... pressure of water vapor (C) Relative humidity (D) None of these
Last Answer : (A) Wet bulb temperature