What is the advantage of PMDC motors for smaller motor requirements over wound rotor and wound stator motors?
What will be an ideal response?
PMDC motors are simple and have high starting torque, which is useful for moving slow-moving collectors.
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In humid regions most rainwater that soaks into the soil and is not used by plants eventually flows into rivers and streams
Indicate whether the statement is true or false
A store replaced 65 of its 150-watt incandescent light bulbs with new 45-watt compact fluorescent light bulbs. The light output is the same; the difference in wattage is the difference in heat output by the bulbs. If 1 watt is equal to 3.41 Btu for each hour the light is on, how much less heat must be removed by the air conditioner each hour because of changing the light bulbs?
Fill in the blank(s) with the appropriate word(s).
In order to make accurate measurements of reference voltages, the voltmeter must have an input impedance of at least:
A. 100 ? B. 1 M? C. 10 M? D. 100 M?
Some drum brakes have a form of self-adjuster to move the brake shoes outward as they wear.
Answer the following statement true (T) or false (F)