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 : Which law that states “Entropy of all perfect crystalline solids is zero at absolute zero temperature”? a. Zeroth law of thermodynamics b. First law of thermodynamics c. Second law of thermodynamics d. Third law of thermodynamics
Last Answer : Third law of thermodynamics
Description : What is the entropy of a pure substance at a temperature of absolute zero? a. unity b. zero c. infinity d. undefined
Last Answer : zero
Description : The gas in a constant gas thermometer cooled to absolute zero would have _________. a. no volume b. no pressure c. zero temperature at all scales d. none of the above
Last Answer : no pressure
Description : _________ the very small KE still present in molecules at absolute zero temperature. a. internal KE b. Atomic kinetic energy c. Zero-Point Energy d. Subliminal Energy
Last Answer : Zero-Point Energy
Description : What states that the entropy of a pure crystalline substance at absolute zero temperature is zero? A. Zeroth law of thermodynamics B. First law of thermodynamics C. Second law of thermodynamics D. Third law of thermodynamics
Description : The kinetic energy of molecules of a gas becomes zero at absolute zero temperature. A. Agree B. Disagree
Last Answer : Answer: A
Description : The condition of perfect vacuum, i.e., absolute zero pressure can be attained at (a) a temperature of – 273.16°C (b) a temperature of 0°C (c) a temperature of 273 °K (d) a negative pressure and 0°C temperature (e) can’t be attained.
Last Answer : Answer : a
Description : Absolute zero pressure will occur (a) at sea level (b) at the center of the earth (c) when molecular momentum of the system becomes zero (d) under vacuum conditions (e) at a temperature of – 273 °K
Last Answer : Answer : c
Description : According to kinetic theory of gases, the absolute zero temperature is attained when (a) volume of the gas is zero (b) pressure of the gas is zero (c) kinetic energy of the molecules is zero (d) specific heat of gas is zero (e) mass is zero.
Description : The state of a thermodynamic system is always defined by its: a. Absolute temperature b. process c. properties d. temperature and pressure
Last Answer : properties
Description : The volume of a confined gas is held constant, the pressure is directly proportional to the absolute temperature. a. Charle’s Law b. Boyle’s Law c. Joule’s Law d. Specific Heat
Last Answer : Boyle’s Law
Description : The pressure of the confined gas is held constant, the volume directly proportional to the absolute temperature. a. Charle’s Law b. Boyle’s Law c. Zeroth Law d. Gas Law
Last Answer : Charle’s Law
Description : “If the temperature o f a fixed quantity of a gas is held constant during a change of state, the volume varies inversely with the absolute pressure. a. Charle’s Law b. Boyle’s Law c. Dalton’s Law d. Amagat’s Law
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 : What temperature scale is identical to the Kelvin scale? A. Ideal gas temperature scale B. Ideal temperature scale C. Absolute gas temperature scale D. Triple point temperature scale
Last Answer : Ideal gas temperature scale
Description : For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature) A. p v = constant, if T is kept constant B. v/T = constant, if p is kept constant C. p/T = constant, if v is kept constant D. T/p = constant, if v is kept constant
Description : The absolute pressure of a given mass of a perfect gas varies inversely as its volume, when the temperature remains constant. This statement is known as Charles’ law. A. Yes B. No
Last Answer : Answer: B
Description : According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant. A. directly B. indirectly
Description : Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to (a) T (b) j (c) J2 (d) Vr (e) 1/Vr.
Description : According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as (a) temperature (b) absolute (c) absolute temperature, if volume is kept constant ... , if temperature is kept constant (e) remains constant,if volume and temperature are kept constant.
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 : ______ of a Body is the absolute quantity of a matter in it. a. Mass b. Weight c. Density d. Volume
Last Answer : Mass
Description : Instrument used to measure the absolute pressure of the atmosphere a. galvanometer b. thermometer c. barometer d. pressure gages
Last Answer : barometer
Description : A vacuum is connected to a tank reads 3kpa at a location w/ the barametric pressure reading is 75mmhg. Determined the P absolute in the tank a. 70.658 kpa b. 68 kpa c. 58.78 kap d. None of the above Pabs = Patm – Pvacuum
Last Answer : 70.658 kpa
Description : A pressure gage registers 50 psig in a region where the barometer is 14.25 psia. Find absolute pressure in psia, Pa. (Formula; p = patm+ pg) a. 433 kPa b. 443 kPa c. 343 kPa d. None of the above
Last Answer : 443 kPa
Description : What law provides an absolute reference point for the determination of entropy? A. Zeroth law of thermodynamics B. First law of thermodynamics C. Second law of thermodynamics D. Third law of thermodynamics
Description : The difference between the absolute pressure and the atmospheric pressure is called the _____ pressure. A. Gage B. Normal C. Standard D. Vacuum
Last Answer : Gage
Description : What is the pressure below atmospheric pressure called? A. Gage pressure B. Absolute pressure C. Atmospheric pressure D. Vacuum pressure
Last Answer : Vacuum pressure
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 : Which of the following is correct? A. Absolute pressure = Gauge pressure + Atmospheric pressure B. Gauge pressure = Absolute pressure + Atmospheric pressure C. Atmospheric pressure = Absolute pressure + Gauge pressure D. Absolute pressure = Gauge pressure – Atmospheric pressure
Description : An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of gas a. Remains constant b. increases c. decreases d. is basically zero
Last Answer : increases
Description : Which of the following relations is not applicable in a free expansion process? a. Heat is rejected to zero b. Work done is zero c. Change in temperature is zero d. Heat supplied is zero
Last Answer : Change in temperature is zero
Description : What happens to the internal energy of water at reference temperature where enthalpy is zero? a. Becomes negative b. Becomes positive c. Remains constant d. Cannot be defined
Last Answer : Becomes negative
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 : During adiabatic, internally reversible process, what is true about the change in entropy? A. It is temperature-dependent B. It is always greater than zero C. It is always zero D. It is always less than zero
Last Answer : It is always zero
Description : For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be (a) zero (b) minimum (d) maximum (d) infinity (e) there is no such criterion.
Description : During the adiabatic process, which of the following is the change in entropy? a. zero b. greater than zero c. less than zero d. infinity
Description : An ideal gas is compresses isothermally. The enthalpy change is a. Always negative b. Always positive c. zero d. undefined
Description : Which of the following is the work done for a closed reversible isometric system? a. negative b. positive c. zero d. undefined
Description : What is the value of the work done for a closed, reversible isometric system? a. zero b. positive c. negative d. positive or negative
Description : The boiling of water into steam in an open container is an example of a/an _________ process. a. adiabatic b. isochoric c. isobaric d. zero work
Last Answer : isobaric
Description : A ______ is a flow in which the gas flow is adiabatic and frictionless and entropy change is zero. A. Isentropic flow B. Isobaric flow C. Steady flow D. Uniform flow
Last Answer : Isentropic flow
Description : What is the value of the work done for a closed, reversible isometric system? A. Zero B. Positive C. Negative D. Positive or negative
Last Answer : Zero
Description : How does an adiabatic process compare to an isentropic process? A. Adiabatic heat transfer is not equal to zero; isentropic heat transfer is zero B. Both heat transfer = 0; isentropic: reversible ... is not equal to zero D. Both heat transfer is not equal to zero; isentropic: irreversible
Last Answer : Both heat transfer = 0; isentropic: reversible
Description : When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency. A. zero B. 1/5 C. 4/5 D. 1
Description : The efficiency of Diesel cycle approaches to Otto cycle efficiency when A. cut-off is increased B. cut-off is decreased C. cut-off is zero D. cut-off is constant
Last Answer : Answer: C
Description : Workdone in a free expansion process is A.zero B.minimum C.maximum D.positive
Description : Barometric pressure is equal to (a) 760 mm Hg (b) zero mm Hg (c) 735.6 mm Hg (d) 1 mm Hg (e) 100mm Hg.
Description : I kgf/cm2 is equal to (a) 760 mm Hg (b) zero mm Hg (c) 735.6 mm Hg (d) 1 mm Hg (e) l00 mm Hg.