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if the expansion processes in the turbines of problem 83 have isentropic efficiencies of 84 and 78 respectively in the
a generating station is to give a power output of 200 mw the superheat outlet pressure of the boiler is to be 170 bar
a steam turbine is to operate on a simple regenerative cyck steam is supplied dry saturated at 40 bar and is exhausted
steam is supplied to a two-stage turbine at 40 bar and 500degc in the first stage the steam expands is entropically to
in a regenerative steam employing three closed feed heaters the steam is supplied to the turbine at 42 bar and 503 tt
question 1three forces of magnitudes p 100 n and 200 n are acting at a point o as shown in figdetermine the magnitude
a certain high-speed temperature probe having a recovery factor of 098plusmn001 is used to measure the temperature of
a certain thermocouple has a time constant of 12 s design a compensation network like that shown in fig 834 having a
a platinum resistance thermometer is placed in a duct to measure the temperature of an airflow stream the thermometer
a radiant energy measurement is made to determine the temperature of a hot block of metal the emitted energy from the
a radiometer is used to measure the radiant energy flux from a material having a temperature of 280plusmn05c the
it is desired to measure a temperature differential of 5f using copper-constantan thermocouples at a temperature level
consider a thin thermocouple that behaves like iron having dimensions of 05 times 01 times 0005 in calculate the time
the following junctions are connected in series copper-constantan at 20c constantan-iron at 100c iron-constantan at 60c
the radiation from a metal part is measured with a pyrometer which indicates a temperature of 300c the actual part
athermometer having an emissivity of 09 is placed in a large room and indicates a temperature of 25cthe walls of the
a thermocouple sensor is enclosed in a metal sheath having a surface emissivity of 07 and placed in a large oven the
a thermopile is constructed of chromel-constantan wire with 15 junction pairs what will be the voltage output from the
what are some of the considerations that must be applied for gas and liquid thermal conductivity that are not important
repeat prob 869 for 08 plusmn 004prob 869the temperature of a surface is to be measured with a radiometer at
the temperature of a surface is to be measured with a radiometer at temperature levels of 350 and 600 k the emissivity
a loschmidt apparatus is used to measure the diffusion coefficient for benzene in airat 25c the diffusion coefficient
the viscosity of an oil having a density of 519 lbmft3 is measured as 200 saybolt seconds determine the dynamic
the viscosity of a gas is to be determined by measuring the flow rate and pressure drop through a capillary tube the
the tolerance limits on the radii of the inner and outer cylinders of fig 99 exert a strong influence on the accuracy