Using the diagram, determine the measure of ?1. ![]()
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Fill in the blank(s) with the appropriate word(s).
90°55'
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A 2,150 sq. ft. house uses a 9,632 sq. ft. horizontal heat exchange bed for its geothermal heat pump system. What is the ratio of bed area to house area?
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. DC motors are generally operated at or above normal speed. 2. DC motors used in industry are never controlled by solid-state controllers. 3. A shunt field power supply converts direct current into alternating current with a rectifier. 4. Shunt field power supplies intended for motors that operate above normal speed must be capable of delivering less than rated voltage. 5. Silicon-controlled rectifiers (SCRs) control voltage by turning on at different times during the waveform.
If the base current increases, ________
A) the collector current increases and the emitter current increases B) the collector current increases and the emitter current decreases C) the collector current increases and the emitter current does not change D) the collector current decreases and the emitter current decreases
The ____________________ cycle of something is the length of time the device is turned on compared to the time it is off.
Fill in the blank(s) with the appropriate word(s).