Which act or organization regulates air conditioning refrigerant?
A) Code of Federal Regulations (CFR) B) MSDS
C) WHMIS D) Clean Air Act (CCA)
D
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On what principal do series motors operate?
What will be an ideal response?
A DPDT switch contact configuration would have two poles, two NC contacts, and two NO contacts
Indicate whether the statement is true or false
Which of the following information is not provided by P&ID symbols and tag numbers?
A. identifies the function of the instrument B. shows how the instrument is mounted C. identifies the loop number where it performs its operation D. identifies the measured variable controlled by the loop E. none of the above
The purpose of an externally equalized thermostatic expansion valve is to ____.
A. compensate for excessive evaporator pressure drop B. allow system to equalize faster C. prevent the expansion valve from frosting up D. allow refrigerant to expand in the compressor