Description : In the process of radiation, energy is carried by electromagnetic waves. What is the speed of electromagnetic waves? A. 182,000 miles/second B. 184,000 miles/second C. 186,000 miles/second D. 188,000 miles/second
Last Answer : 186,000 miles/second
Description : What refers to the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interaction between particles? A. Conduction B. Convection C. Radiation D. Electrification
Last Answer : Conduction
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 : Electromagnetic waves whose photons carry the highest energy also have the:?
Last Answer : Shortest Wavelengths (Apex)
Description : Which of the following best describes heat? a. The capacity to do work b. Forces times distances c. Sum of thermal and chemical energy d. An energy transfer due to temperature difference
Last Answer : An energy transfer due to temperature difference
Description : A process by which heat is transferred through a material without a bulk movement of the material. a. Convection b. Conduction c. Radiation d. Emission
Description : The thermal radiation emitted by a blackbody heated to a given temperature. a. Gamma Radiation b. Black Body Radiation c. Electromagnetic Radiation d. Alpha Radiation
Last Answer : Black Body Radiation
Description : An engineering science primarily concerned with heat and work conversions. a. Thermodynamics b. Mechanics c. Physics d. Electromagnetic
Last Answer : Thermodynamics
Description : Thermal radiation is an electromagnetic radiation with wavelengths in _____ range. A. 1 to 100 µm B. 0.1 to 100 µm C. 0.1 to 10 µm D. 10 to 100 µm
Last Answer : 0.1 to 100 µm
Description : What refers to the amount of heat removed from the cooled space in BTS’s for 1 watt-hour of electricity consumed? A. Cost efficiency rating B. Energy efficiency rating C. Coefficient of performance D. Cost of performance
Last Answer : Energy efficiency rating
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 portion of the internal energy of a system associated with the kinetic energies of the molecules? A. Translational energy B. Spin energy C. Rotational kinetic energy D. Sensible energy
Last Answer : Sensible energy
Description : What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as potential and kinetic energies? A. Macroscopic form of energy B. Microscopic form of energy C. Internal energy D. External energy
Last Answer : Macroscopic form of energy
Description : If a system after undergoing a series of processes, returns to the initial state then (a) process is thermodynamically in equilibrium (b) process is executed in closed system cycle (c) its entropy will ... sum of heat and work transfer will be zero (e) no work will be done by the system.
Last Answer : Answer : d
Description : Which of the following occurs in a reversible polytrophic process? a. Enthalpy remains constant b. Internal energy does not change c. Some heat transfer occurs d. Entropy remains constant
Last Answer : Some heat transfer occurs
Description : The first law of thermodynamics may be expressed in the following equivalent a. the net heat transfer id equal to the network b. the sum of the total energy forms leaving the system boundary is ... neither be created nor destroyed but only converted from one form to another d. all of the above
Last Answer : all of the above
Description : What states that the net mass transfer to or from a system during a process is equal to the net change in the total mass of the system during that process? A. Third law of thermodynamics B. Conservation of energy principle C. Second law of thermodynamic D. Conservation of mass principle
Last Answer : Conservation of mass principle
Description : What is an energy that can be transferred from one object to another causing a change in temperature of each object? A. Power B. Heat transfer C. Heat D. Work
Last Answer : Heat
Description : What are the only two forms of energy interactions associated with a closed system? A. Kinetic energy and heat B. Heat transfer and work C. Thermal energy and chemical energy D. Latent energy and thermal energy
Last Answer : Heat transfer and work
Description : The term “thermodynamics” comes from Greek words “therme” and “dynamis” which means _______. A. Heat power B. Heat transfer C. Heat energy D. Heat motion
Last Answer : Heat power
Description : Which of the following is the correct statement of the second law of thermodynamics? A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy ... energy, which can be obtained from a given quantity of heat energy. D. all of the above
Last Answer : Answer: D
Description : According to Kelvin-Planck's statement of second law of thermodynamics, A. it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work B. it ... other than the transfer of heat from a cold body to a hot body D. none of the above
Last Answer : Answer: A
Description : Which of the following represents the perpetual motion of the first kind (a) engine with 100% thermal efficiency (b) a fully reversible engine (c) transfer of heat energy from low ... its own energy (e) production of energy by temperature differential in sea water at different levels.
Description : A control volume refers to what? a. A fixed region in space b. A reversible process c. an isolated system d. a specified mass
Last Answer : A fixed region in space
Description : What refers to a system in which there is a flow of mass across its boundaries? a. Open system b. Closed system c. Isolated system d. Non-flow system
Last Answer : Open system
Description : What refers to the series of states through which a system passes during the process? a. path b. quasi- static steps c. reversibility moves d. irreversibility moves
Last Answer : path
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 : What refers to the heat needed to change the temperature of the substances without changing its phases? a. Latent heat b. Sensible heat c. Specific heat d. entropy
Last Answer : Sensible heat
Description : What refers to the state at which liquid and gaseous phases are indistinguishable? a. Triple point b. Critical point c. Boiling point d. Pour point
Last Answer : Critical point
Description : What refers to the thermodynamic properties which are independent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Intensive properties
Description : What refers to the thermodynamic properties which are dependent on the amount of the substance present? a. Extensive property b. Intensive properties c. Reversible properties d. Irreversible properties
Last Answer : Extensive property
Description : A Thermodynamic Term That refers to any fixed region in a space a. Control Volume b. Volume c. Density d. Natural Gas
Last Answer : Control Volume
Description : The compressibility factor, x, is used for predicting the behavior of nonideal gases. How is the compressibility ty factor defined relative to an ideal gas? (subscript c refers to critical value) A. ... compressibility factor, x, is an dimensionless constant given by pV=zRT. Therefore z = pV / RT
Last Answer : z = pV/ RT
Description : What refers to the minimum temperature at which combustion can be sustained? A. Burn temperature B. Kindle temperature C. Spark temperature D. Ignition temperature
Last Answer : Ignition temperature
Description : What refers to the rate of thermal radiation emitter per unit area of a body? A. Thermal conductivity B. Absorptivity C. Emissivity D. Emissive power
Last Answer : Emissive power
Description : What refers to the heating of the earth’s atmosphere not caused by direct sunlight but by infrared light radiated by the surface and absorbed mainly by atmospheric carbon dioxide? A. Greenhouse effect B. Global warming C. Thermal rise effect D. Ozone effect
Last Answer : Greenhouse effect
Description : The “equation of state” refers to any equation that relates the ______ of the substance. A. Pressure and temperature B. Pressure, temperature and specific weight C. Temperature and specific weight D. Pressure, temperature and specific volume
Last Answer : Pressure, temperature and specific volume
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 : 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 refers to the measure of the disorder present in a given substance or system? A. Enthalpy B. Entropy C. Heat capacity D. Molar heat
Last Answer : Entropy
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 : 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 : What refers to the series of state through which a system passes during a process? A. Path B. Phase C. Cycle D. Direction
Last Answer : Path
Description : What refers to any change that a system undergoes from one equilibrium state to another equilibrium state? A. Process B. Path C. Phase D. Cycle
Last Answer : Process
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 : When the expansion of compression of gas takes place without transfer of heat to or from the gas the process is called a. reversible b. adiabatic c. polytropic d. isothermal
Last Answer : adiabatic
Description : When the expansion of compression of gas takes place without transfer of heat or from the gas the process is called; a. Isometric process b. Isothermal process c. Isobaric process d. Adiabatic process
Last Answer : Adiabatic process
Description : The process that has no heat transfer a. Density b. Isentropic Process c. Isometric Process d. Adiabatic
Last Answer : Adiabatic