Why is water control so important to the effectiveness of a PEM fuel cell?
What will be an ideal response?
The membrane must be kept wet but the water can freeze in cold weather. The ice can deter the function of the membrane or destroy. Plus water collected in the exhaust of the fuel cell can freeze and cause a plugged exhaust system.
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A certain gas is described by the equation of state
What will be an ideal response?
Here, b is a constant and ? is a function of T only. For this gas, determine expressions for the isothermal compressibility ? and the thermal pressure coefficient (?P /?T ) V . These expressions should contain only T, P, ?, d?/dT, and constants.
A(n) ____________________ is the product of two or more equal factors.
Fill in the blank(s) with the appropriate word(s).
Black smoke from the exhaust pipe is usually caused by coolant mixing in the combustion chamber.
Answer the following statement true (T) or false (F)
Which device protects the air pump from reverse exhaust pressure?
A) PCV valve B) Check valve C) EGR valve D) IAC valve