The current feedback loop provides __________ control.
A. torque
B. speed
C. position
Answer: A
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What was the relationship between the French Revolution and American domestic politics in the 1790s?
What will be an ideal response?
Identify the correct order for the Lockout/Tagout procedure:
____ Shut down any auxiliary systems, such as lube oil and seal flush systems. ____ Close the pump suction and discharge so liquid does not enter the pump. ____ Lock and/or tag the valves and breaker for the motor or valves on the turbine ____ De-energize the driver by opening the breaker to the motor or blocking the inlet and exhaust steam valves on the turbine. ____ Flush/purge the pump to clear the pump of the chemical contained in the pump. ____ Drain the pump to the designated collection system.
A 2-in-diameter spherical ball whose surface is maintained at a temperature of 170°F is suspended in the middle of a room at 70°F. If the convection heat transfer coefficient is 15?Btu/h•ft2•°F and the emissivity of the surface is 0.8, determine the total rate of heat transfer from the ball.
What will be an ideal response?
NEC Article 430, Part VII covers _____
A) motor controllers B) the criteria for selecting the type of enclosure to use for controllers in classified locations C) motor and controller circuit overload protection D) motor circuits involving special equipment and hazardous locations