____ stairs are the simplest design.
A. Straight
B. L-shaped
C. Spiral
D. U-shaped
Answer: A
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?Technician A says that a broken flexplate can result if an alignment bushing is missing and the engine and transmission are not in alignment. Technician B says that forcing an engine into alignment with its mounts can result in a distorted cylinder bore. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
?What happens if the standoff distance becomes too close?
A. ?The working life of the nozzle tip is reduced. B. ?The plasma stream becomes too cool to continue the cut due to the lower arc voltage. C. ?As long as the arc keeps going, the cut will be better and can be cut faster. D. ?On sheet metal the plate can be overheated and begin to distort from the heat.
Schedule ____ for a pipe is often considered a standard strength.
A. 10 B. 40 C. 80 D. 180
Repeat Problem 9.53 for the following specifications:
Vz = 12 V rz = 11.5 ? Prated = 400 mW
At the knee of the curve:
Izk = 0.25 mA rzk = 700 ?
Problem 9.53
The Zener diode in the simple voltage regulator shown in Figure P9.53 is a 1N5231B. The source voltage is obtained from a DC power supply. It has DC and ripple components: vS = VS + vr where:
VS = 20 V |vr| = 250 mV
R = 220 ? |io|avg = 65 mA |vo|avg = 5.1 V
Vz = 5.1 V rz = 17 ? Prated = 0.5W
|iz| min = 10 mA
Determine the maximum rated current the diode can handle without exceeding its power limitation.
