At a permanent magnet motor's no-load speed, the motor torque is
A. negative
B. very small since the connected load is resisting with a large torque and the shaft is not turning
C. so large that the motor comes to a stop
D. maximum
E. zero
Answer: E
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One method of elevating system liquid pressure is to:
A) Control the vibration of the condenser fan motors. B) Control the pressure of the condenser fan motors. C) Control the operation of the condenser fan motors. D) Control the temperature of the condenser fan motors.
The least effective preventive measure for overcoming potential pressure hazards is proper design.
The input to the circuit of Figure P14.1 is a square wave having a period of 2 s, maximum value of 5 V, and minimum value of 0 V. Assume all flip-flops are initially in the reset state.
a. Explain what the circuit does.
b. Sketch the timing diagram, including the input and all four outputs.
Equipment protection techniques may include explosionproof junction boxes, dusttight enclosures, heremetic sealing and ____.
A. polycoating material B. non-flammable paint C. nonincendive wiring D. damping technique