?The improved electron emission of the ____ allows it to carry approximately 20% more current than pure tungsten.
A. ?lanthanum tungsten
B. ?thoriated tungsten
C. ?zirconium tungsten
D. ?cerium tungsten
Answer: B
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What type of sealing arrangement for pumps is composed of two flat surfaces, one stationary and one rotating with the shaft, that are in close contact with each other to create a seal and prevent leakage?
A. Mechanical packing B. Mechanical seal C. Physical seal D. Physical packing
How could cyclic lighting be used to save electricity for a crop of kalanchoe normally lighted between 10 pm and 2 am?
What will be an ideal response?
What could happen to an analog meter if a voltage is tested that exceeds the setting on the meter?
A) The meter will protect itself by not reading the voltage, and no reading will be displayed. B) The meter can be damaged. C) The meter will display "OL" to indicate the reading is out of range. D) A coded series of beeps will indicate to the technician that the reading exceeds the meter setting.
Textbooks recommend a steel pusher be used:
What will be an ideal response?