A cross section of an aluminum bar in the shape of a trapezoid is shown. All the dimensions are in inches. Find the cross-sectional area of the bar.
What will be an ideal response?
Area = 1/2 x (top base + bottom base) x height = 1/2 x (5.25 + 2.25) x 6 = 22.5 sq in
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Motors that used a centrifugal switch to disconnect the start windings cannot be used with variable voltage control.
Answer the following statement true (T) or false (F)
The ____ system, also called the International System of Units (SI), is used in virtually all countries around the world.
a. standard b. conventional c. customary d. metric
What is the purpose of a suction line accumulator in heat pump systems?
A) to protect the compressor by separating oil out of the returning refrigerant B) to provide a safe way for technicians to charge liquid into the system C) to accumulate debris and prevent it from entering the compressor D) to catch any liquid refrigerant that has not evaporated before it reaches the compressor
In the circuit shown in Figure P12.14:
Vo = 10 V Vripple = 10% = 1 V
Io = 650 mA vline = 170 cos ?t
? = 2,513 rad/s
Analysis:
