Name two examples of special equipment that use motor reversal and dynamic braking operations.
What will be an ideal response?
Reversal of motors and dynamic braking are operations used in special equipment such as cranes, hoists, railway cars, and elevators.
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60°?C = ?
A. ?33.3°?F B. ?65.3°?F C. ?108°?F D. ?140°?F
Which of the following statements about the use of turnbuckles is correct?
a. Hook-and-hook turnbuckles are preferred over eye-and-eye turnbuckles for rigging. b. Turnbuckles are used to adjust the length of rigging connections. c. Turnbuckles are best tightened with a pipe wrench at least 24" (61 cm) in length. d. When using multi-legged slings or hitches, two turnbuckles should be used on each leg.
Which of the following components measures the volume and density of the incoming air?
A) Manifold Absolute Pressure Sensor B) Oxygen Sensor C) Mass Airflow Sensor D) Throttle Position Sensor
The opposition to the changes in current flow is identified as ____.
A. electromotive force B. counter electromotive force C. rate of change D. inertia