In conditional guard locking, which of the following is not one of the conditions that must be satisfied for the guard to be opened?
A) Preset interval has elapsed. B) Trapped key-lock clicks off.
C) Machine power contactor is off. D) Dangerous motion has ceased.
B
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Explain why masonry is frequently used in passive solar design.
What will be an ideal response?
Why should an AC generator never be operated open-circuit?
A. It could overcharge the battery B. It could burn out electronic components C. It could damage the AC generator stator D. None of the above
?A blower motor placed in high speed mode has low airflow. A voltmeter placed across the motor reads 4 volts. Technician A says there may be excessive resistance in the ground circuit. Technician B says there may be excessive resistance in the power circuit. Who is correct?
A. ?Technician A only B. ??Technician B only C. ?Both A and B D. ?Neither A nor B
The silicon diode shown in Figure P9.32 is in series with two voltage sources and a resistor, where:
R = 2.2 k? VS2 = 3 V Vr = 0.7 V
Determine the minimum value of VS1 at which the diode will be forward-biased and conduct charge.
