All of the following organizations rate motor oil EXCEPT:
A. SAE
B. EPA
C. API
D. ILSAC
Answer: B
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Loss of P to groundwater is likely to be most significant for which type of soil?
A) highly weathered tropical soils B) silt loam soils formed in windblown loess C) cultivated organic peat soils D) calcareous soils E) sandy soils under pine forests (Spodosols)
Safety concerns are of critical importance with regard to work in a manhole due to the increased threat of:
A) water seepage B) things to trip on in the dark C) toxic gases D) insufficient oxygen E) both a and c F) both c and d
A material constant G is equal to 0.055 V-m/N for quartz in compressive stress and 0.22 V-m/N for polyvinylidene fluoride in axial stress.
a. A force sensor uses a piezoelectric quartz crystal as the sensing element. The quartz element is 0.25 in thick and has a rectangular cross section of 0.09 in2. The sensing element is compressed, and the output voltage is measured across the thickness. What is the output of the sensor in volts per newton? b. A polyvinylidene fluoride film is used as a piezoelectric load sensor. The film is 30 ?m thick, 1.5 cm wide, and 2.5 cm in the axial direction. It is stretched by the load in the axial direction, and the output voltage is measured across the thickness. What is the output of the sensor in volts per newton?
What option would a technician have to increase NPSH available when it is too low?
a. Decease the pressure above the liquid b. Decrease the liquid level c. Increase the pressure above the liquid d. Increase the liquid temperature