What types of things may damage a fuel cell?
What will be an ideal response?
There is a long list of things that can damage the cells themselves, including most oils, any particulates at all such as dirt, sand, rust, or dust, metal shavings, fingernails, paint thinner, hand cleaner, gasoline, blood, pipe dope, and sweat. In particular, anything containing rare earth elements (there are many of these) must be avoided, since these elements will react vigorously with hydrogen. Care should also be taken when dealing with any lubrication oils since many systems use specific oils that will not vaporize and thus contaminate any air stream within the fuel cell or reformer.
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What may be the difference in liability of an owner if the prime contractor injures (a) a passerby and (b) a subcontractor’s employee?
What will be an ideal response?
In a delta-connected alternator, the line voltage is equal to ____ times the phase voltage.
A. 1.0 B. 1.25 C. 1.73 D. 2.0
A "fin comb" is used to ________
A) Straighten and align cooling fins on a condenser or radiator B) Tighten an accessory drive belt. C) Fix the fins on the water pump D) Clean debris from a dash vent
Factors that worked in Rome’s favor during its wars with Carthage include
a. Rome’s superior navy and maritime trade. b. Rome’s stable government and superior financial resources. c. Carthage’s reliance on mercenaries and plantation agriculture. d. Carthage’s focus on maritime trade and neglect of its navy.