Which of the following refrigerant safety designations indicate the refrigerant is hazardous at levels of 400 parts per million or less?
A) B1 B) A3 C) A1 D) A2
A
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A Texas chemical company had to file for bankruptcy because of a nationwide phase-out of methyl tertiary butyl ether (MTBE). The company is in the planning phase of reorganizing and expects to invest $50 million in a new ethanol production facility. Determine the revenue necessary each month to recover its investment in 3 years, plus interest at a rate of 2% per month, compounded continuously. Solve by (a) formula, and (b) spreadsheet function.
What will be an ideal response?
What is the PEL for asbestos?
What will be an ideal response?
Some hybrid air conditioning systems use an electrically driven compressor that uses a special lubricant. What precaution should be taken when servicing these systems?
A) A separate recycling machine for the HEV B) Extra refrigerant filters C) A special gauge set D) Low pressure pump
The start capacitor is removed from the circuit of a CSR compressor by:
A) A high pressure switch. B) A centrifugal switch. C) A potential starting relay. D) The start capacitor does not drop out on a CSR compressor.