Exam 15: Forward-Reverse Control, Jogging and Inching
Exam 1: General Principles of Motor Control, Symbols and Schematic Diagrams11 Questions
Exam 2: Manual Starters and Overload Relays13 Questions
Exam 3: The Control Transformer, Relays, Contactors, and Motor Starters13 Questions
Exam 4: Timing Relays, Pressure Switches and Sensors15 Questions
Exam 5: Float Switches, Flow Switches and Sensors11 Questions
Exam 6: Limit Switches and Phase Failure Relays13 Questions
Exam 7: Temperature Sensing, Devices M Solenoid and Motor Operated Valves12 Questions
Exam 8: Hall Effect Sensors and Proximity Detectors12 Questions
Exam 9: Basic Control Circuits and Photodetectors14 Questions
Exam 10: Schematics, Wiring Diagrams Circuit (1), Timed Starting for Three Motors Circuit (2)10 Questions
Exam 11: Float Switch Control of a Pump and Pilot Lights Circuit (3), Developing a Wiring Diagram Circuit (1)8 Questions
Exam 12: Developing a Wiring Diagram Circuit (2) and Developing a Wiring Diagram Circuit (3)6 Questions
Exam 13: Installing Control Systems and Reading Large Schematic Diagrams13 Questions
Exam 14: Multiple Push Button Stations and Hand-Off-Automatic Controls13 Questions
Exam 15: Forward-Reverse Control, Jogging and Inching14 Questions
Exam 16: Dc Motors and Sequence Control14 Questions
Exam 17: Solid-State Dc Drives and Starting Methods for DC Motors13 Questions
Exam 18: Stepping Motors, the Motor and Starting Methods14 Questions
Exam 19: Autotransformer Starting , Resistor and Reactor Starting for Ac Motors14 Questions
Exam 20: Wye-Delta Starting, Part Winding Starters9 Questions
Exam 21: Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches14 Questions
Exam 22: Variable Frequency Control14 Questions
Exam 23: Troubleshooting, Motor Installation and Developing Control Circuits19 Questions
Exam 51: Digital Logic and the Bounceless Switch14 Questions
Exam 25: Programmable Logic Controllers and Start-Stop Push Button Control14 Questions
Exam 26: Programming a PLC and Analog Sensing for Programmable Controllers10 Questions
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____________________ prevents some action from taking place until some other action has been performed.
Free
(Short Answer)
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Correct Answer:
Interlocking
The term inching actually means to start a motor with short jabs of power at full voltage.
Free
(True/False)
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Correct Answer:
False
How do jogging circuits work?
Free
(Essay)
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Correct Answer:
As with many other types of control circuits, there are different ways in which jogging can be accomplished but, basically, jogging is accomplished by preventing the holding contact from sealing the circuit around the start push button when the motor starter energizes. It should also be noted that jogging circuits require special motor starters rated for jogging duty.
The addition of a(n) ____ to the jog circuit eliminates the problem of the holding contacts making connection before the normally closed section of the jog push button reconnects.
(Multiple Choice)
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A(n) ____________________ switch can be employed to provide jogging. The switch is used to break the connection to the holding contacts.
(Short Answer)
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Because the motor is connected to the power line regardless of which direction it operates, ____ contactor(s) is (are) needed for each direction.
(Multiple Choice)
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True reversing controllers contain two separate contactors and _____ overload relay(s).
(Multiple Choice)
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The term jogging means to start a motor with short jabs of power at reduced voltage.
(True/False)
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How can you reverse the direction of rotation of a single-phase split-phase motor?
(Essay)
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If only one motor is in operation, only one overload relay is needed to protect the motor.
(True/False)
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____________________ can be used to reduce the amount of voltage applied to the motor during inching, or reactors or resistors can be connected in series with the motor to reduce the current supplied by the power line.
(Short Answer)
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Most reversing controllers contain ____________________ interlocks as well as electrical interlocks.
(Short Answer)
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