Description : _________ is the transition of a given substance from the solid to the gas phase with no intermediate liquid stage. a. Convection b. Conduction c. Radiation d. Sublimation
Last Answer : Sublimation
Description : What is the amount of heat needed to turn 1 kg of the substance at its melting point from the solid to liquid state? A. Heat of fusion B. Heat of vaporation C. Heat of condensation D. Heat of fission
Last Answer : Heat of fusion
Description : What is the unique state at which solid, liquid and gaseous phase can go co-exist in equilibrium? a. Triple point b. Critical point c. Boiling point d. Pour point
Last Answer : Triple point
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
Description : The energy associated with individual molecules in a gas, liquid or solid. a. Specific Energy b. Molecular Energy c. Internal Energy d. Phase Energy
Last Answer : Internal Energy
Description : The specific terms used in phase transitions a. melting b. evaporation c. freezing d. sublimation
Last Answer : evaporation
Description : What is the amount of heat needed to turn 1kg of the substance at its boiling point from the liquid to the gaseous state? A. Heat of fusion B. Heat of vaporation C. Heat of condensation D. Heat of fission
Last Answer : Heat of vaporation
Description : The changing of solid directly to vapor without passing through liquid state is called a. Evaporation b. Vaporization c. Sublimation d. Condensation
Description : Fuels that may classified conveniently in solid, liquid and gaseous. a. Unleaded fuel b. Diesel fuel c. Fossil fuel d. All of the above
Last Answer : Fossil fuel
Description : What is defined as the direct conversion of a substance from the solid to the vapor state or vice versa without passing the liquid state? A. Condensation B. Vaporization C. Sublimation D. Cryogenation
Description : Liquid fuels have higher calorific value than solid fuels. A. Yes B. No
Last Answer : Answer: A
Description : Liquid fuels have lower efficiency than solid fuels. A. True B. False
Last Answer : Answer: B
Description : Which of the following statement is incorrect? A. The liquid fuels consist of hydrocarbons. B. The liquid fuels have higher calorific value than solid fuels. C. The solid fuels have higher calorific value than liquid fuels. D. A good fuel should have low ignition point.
Last Answer : Answer: C
Description : Occurs when the vapor pressure equals the atmospheric pressure a. Boiling b. Melting c. Freezing d. Vaporizing
Last Answer : Boiling
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 : The phenomenon of melting under pressure and freezing again when the pressure is reduced is known as a. sublimation b. condensation c. deposition d. regelation
Last Answer : regelation
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 : _________________ 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 : When water exists in the liquid phase and is not about to vaporize, it is considered as _____liquid. A. Saturated B. Compressed or subcooled C. Superheated D. Unsaturated
Last Answer : Compressed or subcooled
Description : The heat absorbed by a unit mass of a material at its holding point in order to convert the material into a gas at the same temperature. a. Latent Heat of Sublimation b. Latent Heat of Vaporization c. Latent Heat of Fusion d. Latent Heat Of Condensation
Last Answer : Latent Heat of Vaporization
Description : Which of the following cannot be measured by a thermometer? a. Latent Heat b. Sensible Heat c. Specific Heat d. Heat of Fusion
Last Answer : Latent Heat
Description : Heat which causes a change in temperature of a substance. a. Latent heat b. Sensible heat c. Specific heat d. Heat of Fusion
Last Answer : Sensible heat
Description : Defined as the ratio of weight of dry steam to the weight of stuff. a. dryness fraction b. Vaporization c. fusion d. super heated steam
Last Answer : dryness fraction
Description : The ______ of a substance is the amount of heat that must be added or removed from a unit mass of the substance to change its temperature by one degree. A. Latent heat of fusion B. Molar heat C. Specific heat capacity D. Specific heat
Last Answer : Specific heat capacity
Description : What is defined as the energy required to raise the temperature of a unit mass of a substance by one degree? A. Latent heat of fusion B. Molar heat C. Specific heat capacity D. Specific heat
Last Answer : Specific heat
Description : What is the latent heat of fusion of water at 1 atm? A. 331.1 kJ/kg B. 332.6 kJ/kg C. 333.7 kJ/kg D. 330.7 kJ/kg
Last Answer : 333.7 kJ/kg
Description : What refers to the strong repulsion between the positively charged nuclei which makes fusion reaction difficult to attain? A. Atomic repulsion B. Nuclear repulsion C. Coulomb repulsion D. Charge repulsion
Last Answer : Coulomb repulsion
Description : It involves a force deforming a solid body a. non-elastic work b. non-flow work c. flow work d. elastic work
Last Answer : elastic work
Description : Types of system except one a. closed b. open c. isolated d. solid
Last Answer : solid
Description : When a solid melts, a. the temperature of the substance increases. b. the temperature of the substance decreases. c. heat leaves the substance. d. heat enters the substance.
Last Answer : heat enters the substance.
Description : What refers to the transfer of energy between a solid surface and the adjacent fluid that is in motion? A. Conduction B. Convection C. Radiation D. Electrification
Last Answer : Convection
Description : Which of the following events is heat exchange involved? a. when there is a phase change b. when there is a chemical reaction c. when the gas expands adiabatically d. when there is difference in temperature
Last Answer : when the gas expands adiabatically
Description : Which of the following is not a thermodynamic property? a. Pressure b. Temperature c. Volume d. Phase
Last Answer : Phase
Description : Heat that cause change in phase without a change in temperature. a) Sensible Heat b) Latent Heat c) Thermo Heat d) None of the above
Description : Heat that cause change in temperature at without a change in phase. a) Sensible Heat b) Latent Heat c) Thermo Heat d) None of the above
Last Answer : Sensible Heat
Description : The term _________ is traditionally used to describe steam issuing from condensate receiver vents and openended condensate discharge lines from steam traps. a. dry steam b. wet steam c. phase steam d. flash steam
Last Answer : flash steam
Description : A plot of pressure vs. temperature for a given substance showing the various phases possible for that particular substance. a. Phase diagram b. P-T diagram c. Wein Diagram d. Histogram
Last Answer : Phase diagram
Description : The amount of heat energy per kilogram that must be added or removed when a substance changes from one phase to another. a. specific heat b. heat of expansion c. latent heat d. useful heat
Last Answer : latent heat
Description : What is the ratio of the useful heat extracted to heating value? A. Combustion efficiency B. Phase efficiency C. Heat efficiency D. Work efficiency
Last Answer : Combustion efficiency
Description : What is a form of mechanical work which is related with the expansion and compression of substances? A. Boundary work B. Thermodynamic work C. Phase work D. System work
Last Answer : Boundary work
Description : What refers to the amount of energy absorbed or released during a phase-change process? A. Molar heat B. Latent heat C. Vaporization heat D. Condensation heat
Last Answer : Latent heat
Description : What refers to the pressure at which a pure substance changes phase at a given temperature? A. Equilibrium pressure B. Saturation pressure C. Superheated pressure D. Subcooled pressure
Last Answer : Saturation pressure
Description : What refers to the temperature at which a pure substance changes phase at a given pressure? A. Equilibrium temperature B. Saturation temperature C. Superheated temperature D. Subcooled temperature
Last Answer : Saturation temperature
Description : What is the state at which all three phases of water coexist in equilibrium? A. Tripoint of water B. Triple point of water C. Triple phase point of water D. Phase point of water
Last Answer : Triple point of water
Description : What is the extremely large amount of energy associated with the strong bonds within the nucleus of the atom itself called? A. Chemical energy B. Latent energy C. Phase energy D. Nuclear energy
Last Answer : Nuclear energy
Description : What is the internal energy associated with the atomic bonds in a molecule called? A. Chemical energy B. Latent energy C. Phase energy D. State energy
Last Answer : Chemical energy
Description : What is the internal energy associated with the phase of a system called? A. Chemical energy B. Latent energy C. Phase energy D. Thermal energy
Last Answer : Latent energy
Description : The sum of all the microscopic form of energy is called _____. A. Total energy B. Internal energy C. System energy D. Phase energy
Last Answer : Internal energy
Description : What is a process with identical end states called? A. Cycle B. Path C. Phase D. Either path or phase
Last Answer : Cycle
Description : A system is said to be in thermodynamic equilibrium if it maintains ______ equilibrium. A. Mechanical and phase B. Thermal and chemical C. Thermal, mechanical and chemical D. Thermal, phase, mechanical and chemical
Last Answer : Thermal, phase, mechanical and chemical