What is an oxidation inhibitor?
What will be an ideal response?
Oxidation inhibitors are additives that slow the rate of a lubricant's natural tendency to oxidize.
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What substance has been genetically engineered into "golden" rice to provide vitamin A, and where does it come from?
What will be an ideal response?
Valve stem-to-guide clearance is usually ________ for an exhaust valve
A) 0.05 to 0.1 mm B) 0.001 to 0.003 inch C) 3 to 5 mm D) None of these
Variable refrigerant flow systems use:
A) Scroll compressors and electronic expansion valves. B) Inverter driven systems and thermostatic expansion valves. C) Inverter driven systems and electronic expansion valves. D) Scroll compressors and thermostatic expansion valves.
The subsequent problems deal with the figure and table below
For a Type J (Iron-Constantan) thermocouple configuration (as shown above) with a 0°C reference (Tref):
where Vemf is the voltage difference produced by the junction pair (Vemf = VA ? VB in the figure).Assume that nodes A and B are at the same temperature, unless indicated otherwise. Assume that the op amp is ideal.If the reference temperature is 0°C, R1=1k?, R2=10k?, and the temperature to be measured is 20°C what is the output voltage Vout?
A. 8.2 mV B. 0 mV C. 9.2 mV D. 10.2 mV E. 11.2 mV