EGEE 420 Exam 2 2025 Questions and Answers

EGEE 420 Exam 2 2025 Questions and
Answers

In PEMFC the electrodes are separated by




-anion exchange membrane




-electron exchange membrane




-cation exchange membrane - ....ANSWER ...-cation exchange membrane


SOFC systems exist in




-one configuration




-three configurations




-two configurations - ....ANSWER ...-two configurations


The operating temperature of SOFC is




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,700 - 1000 oC




150 - 200 oC




50 - 100 oC - ....ANSWER ...-700 - 1000 oC


In SOFC the ion-conducting electrolyte is




ZrO2




YSZ




Y2O3 - ....ANSWER ...-YSZ


The operational temperature of MCFC is around




190 °C




100 °C




650 °C - ....ANSWER ...-650 °C


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,An advantage of SOFC is




-both of these




-high efficiency




-solid electrolyte - ....ANSWER ...-both of these


The temperature range which is not covered by any of the fuel cell technologies is




150 - 250 °C




600 - 950 °C




250 - 600 °C - ....ANSWER ...-250 - 600 °C


A disadvantage of PEMFC is




-both of these




-expensive catalyst




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, -sensitive to fuel impurities - ....ANSWER ...-both of these


Which is the fuel used in DMFC?




-methanol aqueous solution




-hydrogen




-natural gas - ....ANSWER ...-methanol aqueous solution


In SOFC, the efficiency of converting fuel to electricity is around




30 - 40%




80 - 85 %




50 - 60 % - ....ANSWER ...-50 - 60 %


In H2/O2 PEMFC the catalyst is usually




Ni




Cu


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