Related Questions

Rate of heat release in a furnace, which is the measure of heat intensity is defined as
A kcal/hr/m3 combustion space
B kcal/m3 combustion space
C kcal/hr
D None of these
Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
A Ideal
B Real
C Isotonic
D None of these
How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
A miu = miuR
B miu>miuR
C miu
D none of these
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
A Surrounding temperature
B Average temperature of the fin
C Temperature of the fin end
D Constant temperature equal to that of the base
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
A Finned tube heat exchanger with air inside and steam outside
B Finned tube heat exchanger with air outside and steam inside
C Shell and tube heat exchanger with air inside tubes and steam on shell side
D Shell and tube heat exchanger with air on shell side and steam inside tubes
Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).
A Entropy
B Internal energy
C Enthalpy
D Gibbs free energy
During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.
A Enthalpy
B Gibbs free energy
C Internal energy
D Entropy
Specific __________ does not change during phase change at constant temperature and pressure.
A Entropy
B Gibbs energy
C Internal energy
D Enthalpy
A fuel with high heat release rate will
A Require smaller combustion chamber
B Have high calorific value
C Have high adiabatic flame temperature
D None of these

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