The earliest recorded timber shortage was in which country, and when did it occur?
What will be an ideal response?
China about 5,000 years ago.
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The shaded-pole motor has a low starting torque and ____.
a. running torque b. rotation c. linear acceleration d. mass
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What is the step-down turns ratio of a transformer with 200 turns in the primary and 100 turns in the secondary?
a. 1:2 b. 2:1 c. 2:2 d. 3:4
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What is the main goal of grounding in hospitals?
What will be an ideal response?
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During a performance test of an air conditioning system how long should you let the unit run and stabilize before taking a vent temperature reading?
A. 2 to 3 minutes B. 3 to 4 minutes C. 5 to 10 minutes D. 15 to 20 minutes
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