Description : The mechanical equivalent of heat is a. joule b. calorie c. Btu d. Specific heat
Last Answer : joule
Description : 1 BTU(British thermal unit) is equal to------? A. 955 joules B. 990 joules C. 1055 joules (Answer) D. 1211 joules
Last Answer : C. 1055 joules (Answer)
Description : Two thick slices of bread, when completely oxidized by the body, can supply 200,000 cal of heat. How much work is this equivalent to? a) 4,190,000 joules b) 8,390,000 joules c) 839, ... d) 419 000 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie
Last Answer : 419 000 joules
Description : How many joules of work is the equivalent of 15000 cal of heat? a) 62850 joules b) 3579.95 joules c) 14995.81 joules d) 15004.19 joules Formula: J =Work/Heat J = mechanical equivalent of heat whose value is 4.19 joules/calorie
Last Answer : 62850 joules
Description : One erg is equivalent to how many joules? A. 10^-8 B. 10^-7 C. 10^-6 D. 10^-5
Last Answer : 10^-7
Description : One calorie is equivalent to how many joules? A. 4.448 B. 4.184 C. 4.418 D. 4.814
Last Answer : 4.184
Description : What is the SI unit of energy? A. Newton B. Btu C. Calorie D. Joule
Last Answer : Joule
Description : How Many Joules Is 1 Btu?
Last Answer : 1 BTU is equal to 1055.056 joules.
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 : Find ∫ for steam at 100 psia and 600°F.If h = 1329.6 and v = 6.216 a. 1214 Btu / lb b. 1234 Btu /lb c. 1342 Btu / lb d. 1324 Btu /lb formula: ∫ = h– pv/ J
Last Answer : 1214Btu / lb
Description : A certain gas with cp = 0.529Btu/lb°R and R = 96.2ft/lbºR expands from 5 ft and 80ºF to 15 ft while the pressure remains constant at 15.5 psia. a. T2=1.620ºR, ∫H = 122.83 Btu b. T2 = 2°R, ∫H = 122.83 Btu c. ... , ∫H = 122.83 Btu d. T2 = 1°R, ∫H = 122.83 Btu T2= V2(t2)/V1 and ∫H = mcp (T2-T1)
Last Answer : T2=1.620ºR, ∫H = 122.83 Btu
Description : Helium ( R= 0.4698 BTU/lbm-˚R ) is compressed isothermally from 14.7 psia and 68 ˚F. The compression ratio is 1:4. Calculate the work done by the gas. A. –1454 BTU/lbm B. -364 BTU/lbm C.-187BTU/lbm D.46.7 BTU/lbm Formula: W = RT ln (V2/V1)
Last Answer : -364 BTU/lbm
Description : Find the change in internal energy of 5 lb. of oxygen gas when the temperature changes from 100 ˚F to 120 ˚F. CV = 0.157 BTU/lbm-˚R A.14.7 BTU B.15.7 BTU C. 16.8 BTU D. 15.9 BTU Formula: U= mcv T
Last Answer : 15.7 BTU
Description : Calculate the entropy of steam at 60psiawith a quality of 0.8 A. 0.4274 BTU/lbm-˚R B. 0.7303 BTU/lbm-˚R C. 1.1577 BTU/lbm-˚R D. 1.2172 BTU/lbm-˚R Formula: fromthe steamtable at 60 psia: sƒ = 0.4274 BTU/lbm-˚R sƒg = 1.2172 BTU/lbm-˚R) s = sƒ + x sƒg where x = is the quality
Last Answer : 1.1577 BTU/lbm-˚R
Description : _________ is the quantity of heat required to raise the temperature of one pound of water 1 F˚ from 63 ˚F to 64 ˚F. a. one Joule b. one calorie c. one watt d. one BTU
Last Answer : one BTU
Description : The amount of heat required to raise the temperature of 1 pound of water by 1°F is called ______. A. Calorie B. Joule C. BTU D. Kilocalorie
Last Answer : BTU
Description : The amount of heat required to raise the temperature of 1kg of water through 1 °C is called ______. A. Calorie B. Joule C. BTU D. Kilocalorie
Description : For a body cooling in a draft, the rate of heat loss is proportional to the difference in temperature between the body and its surroundings. a. Nemst Effect b. Caloric Theory c. Joule’s Law d. Newton’s Law of Cooling
Last Answer : Newton’s Law of Cooling
Description : The theory that heat consisted of a fluid, which could be transferred from one body to another, but not “created” or “destroyed”. a. Clausius Theorem b. Caloric Theory c. Joules Law d. Newton’s Law of cooling
Last Answer : Caloric Theory
Description : At Equilibrium, the radiation emitted must equal the radiation absorbed. a. Boyle’s Law b. Planck’s Law c. Kirchoff’s Law d. Joule’s Law
Last Answer : Kirchoff’s Law
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 acceleration of a particular body is directly proportional to the resultant force acting on it & inversely proportional to its mass. a. Pascal's Law b. Joule's Law c. Newton's Law d. None of the above
Last Answer : Newton's Law
Description : p1V1= p2V2 a. Charle's Law b. Boyle's Law c. Ideal Gas Law d. Joule's Law
Last Answer : Boyle's Law
Description : Measurement of temperature is based on (a) thermodynamic properties (b) zeroth law of thermodynamics (c) first law of thermodynamics (d) second law of thermodynamics (e) joule’s law.
Last Answer : Answer : b
Description : In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about (a) 100 xlOO5 joules (b) lxlO5 joules (c) 10 xlO5 joules (d) 10 xlO5 kilo joules (e) 10xl04ki\ojoules.
Last Answer : Answer : c
Description : The statement that molecular weights of all gases occupy the same volume is known as (a) Avogadro’s hypothesis (b) Dalton’s law (c) Gas law (d) Law of thermodynamics (e) Joule’s law.
Last Answer : Answer : a
Description : According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant (a) Joule’s law (b) Boyle’s law (c) Regnault’s law (d) Gay-Lussac law (e) Charles’ law.
Last Answer : Answer : e
Description : Which law states that the specific heat of a gas remains constant at all temperatures and pressures (a) Charles’ Law (b) Joule’s Law (c) Regnault’s Law (d) Boyle’s Law (e) there is no such law.
Description : Which law states that the internal energy of a gas is a function of temperature (a) Charles’ law (b) Joule’s law (c) Regnault’s law (d) Boyle’s law (e) there is no such law.
Description : Which of the following laws is applicable for the behavior of a perfect gas (a) Boyle’s law (b) Charles’law (c) Gay-Lussac law (d) all of the above (e) Joule’s law.
Last Answer : Answer : d
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 : The unit “pascal” is equivalent to ______. A. N/m^2 B. N/m C. N-m D. N-m^2
Last Answer : N/m^2
Description : A British Thermal Unit, or BTU, is the amount of heat required to raise one pound of what material one degree Fahrenheit?
Last Answer : ANSWER: WATER
Description : Diffusion due to thermal motion is called a. dilation b. infusion c. effusion d. dispersion
Last Answer : effusion
Description : The radiation emitted by a body as a result of its temperature. a. Blackbody Radiation b. Thermal Inversion c. Thermionic Inversion d. Thermal Radiation
Last Answer : Thermal Radiation
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 : If two systems are in the thermal equilibrium with a third system, then they must be in thermal equilibrium with each other. a. Zeroth Law of Thermodynamics b. First Law of Thermodynamics c. Second Law of Thermodynamics d. Third Law of Thermodynamics
Last Answer : Zeroth Law of Thermodynamics
Description : Which of the following engines was introduced by a German engineer, Nickolas Otto? a. Gasoline engine b. Diesel engine c. Gas turbine d. Thermal engine
Last Answer : Gasoline engine
Description : Which of the following thermodynamic devices operates the reverse of the heat engine? a. Thermal pump b. Thermal evaporator c. Thermal condenser d. Thermal equilibrant
Last Answer : Thermal pump
Description : Which of the following is used in thermal power plant? a. Brayton cycle b. Reversed carnot cycle c. Rankine cycle d. Otto cycle
Last Answer : Rankine cycle
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 : When an object undergoes thermal expansion, a. any holes in the object expand as well b. any holes in the object remain the same c. mass increases d. molecular activities would cease
Last Answer : any holes in the object expand as well
Description : Which of the following have the highest thermal conductivities? a. liquids b. gases c. metals d. solids other than metals
Last Answer : metals
Description : A stress which develops within an object when it attempts to expand or contract in response to a temperature changes, but cannot, due to being held rigidly in place. a. elongation b. thermal stress c. expansion contraction d. thermal expansion
Last Answer : thermal stress
Description : The change in physical size of a substance when its temperature changes. a. intensive property b. extensive property c. volume expansion d. thermal expansion
Last Answer : thermal expansion
Description : Which of the following is the formula for thermal resistance? A. Thickness of material/ thermal conductivity of material B. 2(thickness of material)/thermal conductivity of material C. ... / 2(thermal conductivity of material) D. Thickness of material x thermal conductivity of material
Last Answer : Thickness of material/ thermal conductivity of material
Description : What states that thermal efficiencies of all reversible heat engines operating between the same two reservoirs are the same and that no heat engine is more efficient than a reversible one operating between the ... A. Ericson principle B. Carnot principle C. Otto principle D. Stirling principle
Last Answer : Carnot principle
Description : What is the highest efficiency of heat engine operating between the two thermal energy reservoirs at temperature limits? A. Ericson efficiency B. Otto efficiency C. Carnot efficiency D. Stirling efficiency
Last Answer : Carnot efficiency
Description : What is defined as the ratio of the net electrical power output to the rate of fuel energy input? A. Combustion efficiency B. Thermal efficiency C. Overall efficiency D. Furnace efficiency
Last Answer : Overall efficiency
Description : Thermal efficiency is the ratio of: A. Network input to total heat input B. Network output to total heat output C. Network output to total heat input D. Network input to total heat output
Last Answer : Network output to total heat input