To lower and narrow a valve seat that has been cut at a 45-degree angle, use a cutter or stone of what angle?
A) 45 degrees B) 15 degrees C) 60 degrees D) 30 degrees
D
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Using the diagram from problem 7 what is the length A, in centimeters? Carry the answer to three decimal places.
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To minimize corrosion in a steam boiler, the P-alkalinity of the boiler water should be maintained between _____.
a. 50 and 100 ppm b. 100 and 200 ppm c. 200 and 300 ppm d. 300 and 700 ppm
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In a parallel circuit, ET = 277 V, R = 56 k?, and XL = 68 k?. What is the phase angle (angle theta)?
A. 34.56° B. 39.47° C. 50.53° D. 90°
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High head pressure in a window air conditioner is an indication of ____.
A. a dirty or blocked condenser B. a dirty evaporator C. a refrigerant undercharge D. low outside air temperature
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