Describe why start-up is critical for MCFC systems.
What will be an ideal response?
Start-up for MCFC systems is critical because it sets the system seals and determines overall electrolyte distribution. Unlike other fuel cell systems, failing to exercise a fine degree of control during start-up can be disastrous to MCFC systems. The same is true of a shutdown cycle. Proper operations and maintenance protocols are extremely important to fuel cells systems, and while computer controls can limit bad choices, they cannot entirely eliminate unwise and even unsafe behavior. Using MCFC systems as an example, the liquid electrolyte is well over 1,000°F and, if during start-up or shutdown the ceramic holding the molten material cracks, hot liquid may leak.
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Answer the following statement(s) true (T) or false (F)
1. Most of the pressure switches used for air conditioning are operated by a bellows. 2. In a high-pressure switch, the bellows is connected to the suction side of the compressor. 3. The low-pressure switch is connected to the discharge side of the compressor. 4. Most of the pressure switches used for commercial or industrial systems are adjustable. 5. The pressure settings are different for different types of refrigerant.
Habituation is learning to respond without thinking
Indicate whether this statement is true or false.
A ________________ is acable or group of insulated wires put together in one sealed assembly.
Fill in the blank(s) with the appropriate word(s).
Which term describes the PCM using oxygen sensor feedback to control fuel delivery?
A) Open loop mode B) Closed loop mode C) Starting mode D) Clear flood mode