In the above diagram if a is 8 bricks and b is 9 bricks, what is the measurement of e to the nearest whole inch?
What will be an ideal response?
28
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Temporary hydrotest spools are installed to _____.
a. isolate the section of the piping b. make the piping longer c. provide a seat for the pipefitter d. replace the nearest hanger
____________________ bones, like ribs, protect vital organs.
Fill in the blank(s) with the appropriate word(s).
A heat pump defrost control must do three things: Turn on auxiliary heat, turn off the condensor fan motor, and:
A) Turn off the indoor blower fan B) Shift the reversing valve from heat to cool C) Turn off the compressor D) Deactivate the thermostat
Answer the following statement(s) true (T) or false (F)
1. When the SCR is used for voltage control, if current is to flow to the load, it must pass through the SCR, which is connected across the positive and negative points of the bridge rectifier. 2. Most AC inductive loads such as motors or transformers have a high wire resistance. 3. If DC voltage is applied to a pure resistance, adverse conditions can occur. 4. Thyristor devices such as the SCR and triac control the voltage by chopping the waveform. 5. When variable AC voltage is to be connected to an induction motor to perform the job of speed control, both halves of the AC waveform are not required to be conducted to the stator of the motor.