a) 0.5 – 1000 (W/(m2K)) b) 5 – 100 (W/(m2K)) c) 10 – 1000 (W/(m2K)) d) 50 – ...
View QuestionConvective heat transfer coefficients for air under natural convection is __________
a) 0.5 – 1000 (W/(m2K)) b) 50 – 3000 (W/(m2K)) c) 10 – 1000 (W/(m2K)) d) 50 – ...
View QuestionIn __________, fluid is forced to flow over a surface or in a tube by external means.
a) natural convection b) forced convection c) conduction d) radiation Answer: b Explanation: Forced convection is a ...
View Question_________ is the currents produced only by temperature difference.
a) Natural convection b) Forced convection c) Conduction d) Radiation Answer: a Explanation: Natural convection is a ...
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Are these statements about the thermal convection true?
Statement 1: Thermal convection depends on temperature gradient.
Statement 2: It does not depend on relative motion of the fluid.
Are these statements about the thermal convection true? Statement 1: Thermal convection depends on temperature gradient. Statement 2: ...
View QuestionIs conduction faster than convection?
a) True b) False Answer: b Explanation: Convection is faster than conduction. In convection the medium ...
View Question___________ is the transfer of thermal energy through the movement of a liquid or gas.
a) Convection b) Conduction c) Radiation d) Evaporation Answer: a Explanation: Convection is the transfer of thermal ...
View QuestionWhich law governs the thermal convection?
a) Fourier’s law b) Pascal law c) Newton’s law d) Stefan-Boltzmann Law Answer: c Explanation: Newton’s ...
View QuestionWhich of the following example explain convection?
a) The heat from a hot liquid makes the cup itself hot b) Walking on the beach on ...
View QuestionWhich is the slowest mode of heat transfer?
a) Conduction b) Convection c) Radiation d) Both radiation and convection Answer: a Explanation: Conduction is the ...
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