How can the presence of non-condensables be detected in a refrigerant cylinder?
What will be an ideal response?
Measure the cylinder pressure and temperature and compare them on a pressure-temperature char. Non- condensables will cause the cylinder pressure to be considerably above the pressure on the chart for the measured temperature.
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The maximum presumptive bearing capacity value of bedrock provided by the International Building Code is
A) 12.0 ksf. B) 18.0 ksf. C) 16.5 ksf. D) 15.0 ksf. E) none of the above.
A 10% duty cycle indicates that the load is turned on 1/10th of the time.
Answer the following statement true (T) or false (F)
Technician A says leaking valves could cause noticeable popping noises from the engine. Technician B says worn piston rings could cause a lack of power. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
What do all post-2007 diesel particulate filters (DPFs) require periodically?
A. Filter replacement. B. Bench testing to meet EPA standards. C. Service intervention to remove ash residues. D. Pressure testing to check for leaks.