Description : _________ is defined as that equivalent to the pressure due to a column of mercury 76cm long. a. surface pressure b. gage pressure c. standard atmospheric pressure d. isobaric pressure
Last Answer : standard atmospheric pressure
Description : Water always boils when its (A) Temperature reaches 100° C (B) Vapour pressure equals 76 cm of Hg (C) Saturated vapour pressure equals the external pressure on its surface (D) Saturated vapour pressure is less than the atmospheric pressure
Last Answer : (C) Saturated vapour pressure equals the external pressure on its surface
Description : Occurs when the vapor pressure equals the atmospheric pressure a. Boiling b. Melting c. Freezing d. Vaporizing
Last Answer : Boiling
Description : Liquid hydrogen boils at 17 K. What is the temperature in degrees Celsius? a. 290 b. 63 c. -120 d. -256
Last Answer : -256
Description : On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises? a. the relative humidity increases b. the relative humidity decreases c. the relative humidity remains constant d. the air would eventually become saturated
Last Answer : the relative humidity decreases
Description : __________________ is a vapor having a temperature higher than the saturation temperature corresponding to the existing pressure. a) Vapor b) Saturated Vapor c) Superheated Vapor d) Wet Vapor
Last Answer : Superheated Vapor
Description : ___________________ is a vapor at the saturation conditions (saturation temperature and saturation pressure). a) Vapor b) Saturated Vapor c) Superheated Vapor d) Wet Vapor
Last Answer : Saturated Vapor
Description : What is the temperature when water and vapor are in equilibrium with the atmospheric pressure? a. Ice point b. Steam point c. Critical point d. Freezing point
Last Answer : Steam point
Description : What is the temperature when water and vapor are in the equilibrium with the atmospheric pressure? a. Ice point b. Steam point c. Critical point d. Freezing point
Description : The temperature at which the vapor pressure exactly equals one atm is called _________. a. boiling temperature b. normal boiling point c. triple point d. point of infliction
Last Answer : normal boiling point
Description : Which is NOT a correct statement? A. A superheated vapor will not condense when small amount of heat re removed B. An ideal gas is a gas that is not a superheated vapor C. A saturated ... absorb as much heat as it can without vaporizing D. Water at 1 atm and room temperature is subcooled
Last Answer : An ideal gas is a gas that is not a superheated vapor
Description : The _________ is defined as the amount of heat required to change the temperature of 1 gram of water by 1 Celsius degree. a. specific heat b. latent heat c. Joule d. calorie
Last Answer : calorie
Description : Which of the following is standard temperature and pressure (STP)? A. 0 degree Celsius and one atmosphere B. 32 degree Fahrenheit and zero pressure C. 0 degree Kelvin and one atmosphere D. 0 degree Fahrenheit and zero pressure
Last Answer : 0 degree Celsius and one atmosphere
Description : For which of the following substances, the gas laws can be used with minimum error (a) dry steam (b) wet steam (c) saturated steam (d) superheated steam (e) steam at atmospheric pressure.
Last Answer : Answer : d
Description : A 10m^3 vessel initially contains 5 m^3 of liquid water and 5 m^3 of saturated water vapor at 100 kPa. Calculate the internal energy of the system using the steam table. A. 5 x10^5 kJ B. 8x10^5 kJ C. 1 ... 3 kJ/kg ug= 2506kJ/kg formula: Mvap = V vap/vg M liq = Vliq/ vƒ u =uƒM liq + ug M vap
Last Answer : 2 x10^6 kJ
Description : ___________ is the percent by weight that is saturated liquid. a) Quality, x b) Percent Moisture, y c) Vapor c) Liquid
Last Answer : Percent Moisture, y
Description : ___________ is the percent by weight that is saturated vapor. a) Quality, x b) Percent Moisture, y c) Vapor d) Liquid
Last Answer : Quality, x
Description : _________________ is a combination of saturated vapor and saturated liquid. a) Vapor b) Saturated Vapor c) Superheated Vapor d) Wet Vapor
Last Answer : Wet Vapor
Description : _________________ is the name given to a gaseous phase that is in contact with the liquid phase, or that is in the vicinity of a state where some of it might be condensed. a) Vapor b) Saturated Vapor c) Superheated Vapor d) Wet Vapor
Last Answer : Vapor
Description : What refers to the point at which the saturated liquid and saturated vapor states are the same or identical? A. Triple point B. Inflection point C. Maximum point D. Critical point
Last Answer : Maximum point
Description : A vapor that is not about to condense is called _____ vapor. A. Saturated B. Compressed or subcooled C. Superheated D. Unsaturated
Last Answer : Superheated
Description : A vapor that is about to condense is called ______ vapor. A. Saturated B. Compressed or subcooled C. Superheated D. Unsaturated
Last Answer : Saturated
Description : What refers to the amount of heat needed to raise the temperature of an object by one degree Celsius or 1K? A. Heat capacity B. Specific heat C. Latent heat D. Molar heat
Last Answer : Heat capacity
Description : The volume of an ideal gas is directly proportional to its a. pressure b. Celsius temperature c. Kelvin temperature d. Fahrenheit temperature
Last Answer : Kelvin temperature
Description : Find the pressure due to a column of mercury 74.0 cm high. a. 91.80 x 10^3 N/m^2 b. 73.56 x 10^2 N/m^2 c. 9.86 x 10^4 N/m^2 d. 87.2 x 10^4 N/m^2
Last Answer : 9.86 x 10^4 N/m^2
Description : At steam point, the temperature of water and its vapor at standard pressure are: a. Extremes or maximum b. unity c. in equilibrium d. undefined
Last Answer : in equilibrium
Description : Which of the following is NOT a value of the standard atmospheric pressure? A. 1 bar B. 1 atm C. 1 kgf/cm^2 D. 14.223 psi
Last Answer : 14.223 psi
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 : A 0.064 kg of octane vapor (MW = 114) is mixed with0.91 kg of air (MW = 29.0) in the manifold of an Engine. The total pressure in the manifold is 86.1 kPa, and a temperature is 290 K. assume octane behaves ideally. What is ... of the air in the mixture in KPa? a. 46.8 b. 48.6 c. 84.6 d. 64.8
Last Answer : 84.6
Description : _____________ is the difference between the actual temperature of superheated vapor and the saturation temperature for the existing pressure. a) Degrees of Superheat, °SH b) Degrees of Sub cooled, °SB c) Both a and b d) None of the above
Last Answer : Degrees of Superheat, °SH
Description : __________________ represents the highest pressure and highest temperature at which liquid and vapor can coexist in equilibrium. a) Critical Point b) Boiling Point c) Quality Point d) None of the above
Last Answer : Critical Point
Description : Vapor pressure depends only on _________. a. pressure b. force c. volume d. temperature
Last Answer : temperature
Description : What refers to a liquid whose temperature is lower than saturation temperature corresponding to the existing pressure? a. Subcooled liquid b. Saturated liquid c. Pure liquid d. Compressed liquid
Last Answer : Subcooled liquid
Description : __________________ is a liquid at the saturations which has temperature equal to the boiling point corresponding to the existing pressure. a. Saturation Temperature b. Sub cooled Liquid c. Compressed Liquid d. Saturated Liquid
Last Answer : Saturated Liquid
Description : _________________ is one which has a pressure higher than the saturation pressure corresponding to the existing temperature. a. Saturation Temperature b. Sub cooled Liquid c. Compressed Liquid d. Saturated Liquid
Last Answer : Compressed Liquid
Description : ________________ is one which has a temperature lower than the saturation temperature corresponding to the existing pressure. a. Saturation Temperature b. Sub cooled Liquid c. Compressed Liquid d. Saturated Liquid
Last Answer : Sub cooled Liquid
Description : 212 °F = _____R a. 567 b. 672 c. 700 d. None of the above
Last Answer : 672
Description : 212 °C = _____ K a. 485 b. 435 c. 498 d. None of the above
Last Answer : 485
Description : 212 °F = _____ °C a. 200 b. 150 c. 100 d. None of the above
Last Answer : 100
Description : Water vapor at 100 KPa and 150°C is compressed isothermally until half the vapor has condensed. How much work must be performed on the steam in this compression process per kilogram? a) -1384.7 kJ b) 1384.7 kJ c) -2384.7 kJ d) 2384.7 kJ
Last Answer : -1384.7 kJ
Description : What is defined as the quantity of heat needed to raise the temperature of one kilogram of water by one degrees Celsius? a. Kilojoule b. Btu c. Kilocalorie d. Latent heat
Last Answer : Kilocalorie
Description : The volume of a gas under standard atmospheric pressure & 76 cmHg is 200m³. What is the volume when pressure is 80 cmHg if the temperature is unchanged? a) 180 in³ b) 170 in³ c) 160 in³ d) 190 in³ Formula: P2V2 = P1V1
Last Answer : 190 in³
Description : A temperature scale whose zero point is absolute zero, the temperature of “0” entropy at which all molecular motion stops. a. Celsius b. Fahrenheit c. Kelvin d. Rankine
Last Answer : Kelvin
Description : _____________ is the base unit of thermodynamics temperature. a) Celsius b) Fahrenheit c) Kelvin d) None of the above
Description : What is the Si unit for temperature? a. Kelvin b. Celsius c. Fahrenheit d. Rankine
Description : What is the thermodynamic temperature scale in the English system? A. Kelvin scale B. Celsius scale C. Fahrenheit scale D. Rankine scale
Last Answer : Rankine scale
Description : What is the thermodynamic temperature scale in the SI system? A. Kelvin scale B. Celsius scale C. Fahrenheit scale D. Rankine scale
Last Answer : Kelvin scale
Description : The unit of temperature in S.I. units is (a) Centigrade (b) Celsius (c) Fahrenheit (d) Kelvin (e) Rankine.
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
Description : The pressure of the vapor phase of a substance that is in equilibrium with the liquid or solid phase. a. Phase Pressure b. Equilibrium Vapor Pressure c. Specific Pressure d. Equilibrium Phase Pressure
Last Answer : Equilibrium Vapor Pressure